---
_id: '4259'
abstract:
- lang: eng
text: 'We extend current multilocus models to describe the effects of migration,
recombination, selection, and nonrandom mating on sets of genes in diploids with
varied modes of inheritance, allowing us to consider the patterns of nuclear and
cytonuclear associations (disequilibria) under various models of migration. We
show the relationship between the multilocus notation recently presented by Kirkpatrick,
Johnson, and Barton (developed from previous work by Barton and Turelli) and the
cytonuclear parameterization of Asmussen, Arnold, and Avise and extend this notation
to describe associations between cytoplasmic elements and multiple nuclear genes.
Under models with sexual symmetry, both nuclear-nuclear and cytonuclear disequilibria
are equivalent. They differ, however, in cases involving some type of sexual asymmetry,
which is then reflected in the asymmetric inheritance of cytoplasmic markers.
An example given is the case of different migration rates in males and females;
simulations using 2, 3, 4, or 5 unlinked autosomal markers with a maternally inherited
cytoplasmic marker illustrate how nuclear-nuclear and cytonuclear associations
can be used to separately estimate female and male migration rates. The general
framework developed here allows us to investigate conditions where associations
between loci with different modes of inheritance are not equivalent and to use
this nonequivalence to test for deviations from simple models of admixture. '
acknowledgement: The authors thank Toby Johnson for his helpful comments on this manuscript.
This work was supported by a National Science Foundation NATO postdoctoral fellowship
and National Science Foundation grants DEB-9813335 and DEB-0108242 to M.E.O.; N.H.B.
gratefully acknowledges the support of the Darwin Trust of Edinburgh and the National
Environmental Research Council.
article_processing_charge: No
article_type: original
author:
- first_name: Maria
full_name: Orive, Maria
last_name: Orive
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Orive M, Barton NH. Associations between cytoplasmic and nuclear loci in hybridizing
populations. Genetics. 2002;162(3):1469-1485. doi:10.1093/genetics/162.3.1469
apa: Orive, M., & Barton, N. H. (2002). Associations between cytoplasmic and
nuclear loci in hybridizing populations. Genetics. Genetics Society of
America. https://doi.org/10.1093/genetics/162.3.1469
chicago: Orive, Maria, and Nicholas H Barton. “Associations between Cytoplasmic
and Nuclear Loci in Hybridizing Populations.” Genetics. Genetics Society
of America, 2002. https://doi.org/10.1093/genetics/162.3.1469.
ieee: M. Orive and N. H. Barton, “Associations between cytoplasmic and nuclear loci
in hybridizing populations,” Genetics, vol. 162, no. 3. Genetics Society
of America, pp. 1469–1485, 2002.
ista: Orive M, Barton NH. 2002. Associations between cytoplasmic and nuclear loci
in hybridizing populations. Genetics. 162(3), 1469–1485.
mla: Orive, Maria, and Nicholas H. Barton. “Associations between Cytoplasmic and
Nuclear Loci in Hybridizing Populations.” Genetics, vol. 162, no. 3, Genetics
Society of America, 2002, pp. 1469–85, doi:10.1093/genetics/162.3.1469.
short: M. Orive, N.H. Barton, Genetics 162 (2002) 1469–1485.
date_created: 2018-12-11T12:07:54Z
date_published: 2002-11-01T00:00:00Z
date_updated: 2023-06-06T12:19:54Z
day: '01'
doi: 10.1093/genetics/162.3.1469
extern: '1'
external_id:
pmid:
- '12454089'
intvolume: ' 162'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1462324/
month: '11'
oa: 1
oa_version: Published Version
page: 1469 - 1485
pmid: 1
publication: Genetics
publication_identifier:
issn:
- 0016-6731
publication_status: published
publisher: Genetics Society of America
publist_id: '1836'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Associations between cytoplasmic and nuclear loci in hybridizing populations
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 162
year: '2002'
...
---
_id: '4260'
abstract:
- lang: eng
text: 'We calculate the fixation probability of a beneficial allele that arises
as the result of a unique mutation in an asexual population that is subject to
recurrent deleterious mutation at rate U. Our analysis is an extension of previous
works, which make a biologically restrictive assumption that selection against
deleterious alleles is stronger than that on the beneficial allele of interest.
We show that when selection against deleterious alleles is weak, beneficial alleles
that confer a selective advantage that is small relative to U have greatly reduced
probabilities of fixation. We discuss the consequences of this effect for the
distribution of effects of alleles fixed during adaptation. We show that a selective
sweep will increase the fixation probabilities of other beneficial mutations arising
during some short interval afterward. We use the calculated fixation probabilities
to estimate the expected rate of fitness improvement in an asexual population
when beneficial alleles arise continually at some low rate proportional to U.
We estimate the rate of mutation that is optimal in the sense that it maximizes
this rate of fitness improvement. Again, this analysis relaxes the assumption
made previously that selection against deleterious alleles is stronger than on
beneficial alleles. '
acknowledgement: "We thank Brian Charlesworth, Arcadi Navarro, Allen Orr, Sally Otto,
Mario Pineda-Krch, Rosie Redfield, Olivier Tenaillon, and two anonymous reviewers
for discussions and/or helpful comments on the\r\nmanuscript. T.J. is supported
by Wellcome Trust International Prize Travelling Research Fellowship no. 061530.
N.B. is supported by the Biotechnology and Biological Sciences Research Council
and by the Natural Environment Research Council."
article_processing_charge: No
article_type: original
author:
- first_name: Toby
full_name: Johnson, Toby
last_name: Johnson
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Johnson T, Barton NH. The effect of deleterious alleles on adaptation in asexual
populations. Genetics. 2002;162(1):395-411. doi:10.1093/genetics/162.1.395
apa: Johnson, T., & Barton, N. H. (2002). The effect of deleterious alleles
on adaptation in asexual populations. Genetics. Genetics Society of America.
https://doi.org/10.1093/genetics/162.1.395
chicago: Johnson, Toby, and Nicholas H Barton. “The Effect of Deleterious Alleles
on Adaptation in Asexual Populations.” Genetics. Genetics Society of America,
2002. https://doi.org/10.1093/genetics/162.1.395.
ieee: T. Johnson and N. H. Barton, “The effect of deleterious alleles on adaptation
in asexual populations,” Genetics, vol. 162, no. 1. Genetics Society of
America, pp. 395–411, 2002.
ista: Johnson T, Barton NH. 2002. The effect of deleterious alleles on adaptation
in asexual populations. Genetics. 162(1), 395–411.
mla: Johnson, Toby, and Nicholas H. Barton. “The Effect of Deleterious Alleles on
Adaptation in Asexual Populations.” Genetics, vol. 162, no. 1, Genetics
Society of America, 2002, pp. 395–411, doi:10.1093/genetics/162.1.395.
short: T. Johnson, N.H. Barton, Genetics 162 (2002) 395–411.
date_created: 2018-12-11T12:07:54Z
date_published: 2002-09-01T00:00:00Z
date_updated: 2023-06-06T11:45:48Z
day: '01'
doi: 10.1093/genetics/162.1.395
extern: '1'
external_id:
pmid:
- '12242249'
intvolume: ' 162'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1462245/
month: '09'
oa: 1
oa_version: None
page: 395 - 411
pmid: 1
publication: Genetics
publication_identifier:
issn:
- 0016-6731
publication_status: published
publisher: Genetics Society of America
publist_id: '1833'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The effect of deleterious alleles on adaptation in asexual populations
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 162
year: '2002'
...
---
_id: '4261'
abstract:
- lang: eng
text: Until recently, it was impracticable to identify the genes that are responsible
for variation in continuous traits, or to directly observe the effects of their
different alleles. Now, the abundance of genetic markers has made it possible
to identify quantitative trait loci (QTL) — the regions of a chromosome or, ideally,
individual sequence variants that are responsible for trait variation. What kind
of QTL do we expect to find and what can our observations of QTL tell us about
how organisms evolve? The key to understanding the evolutionary significance of
QTL is to understand the nature of inherited variation, not in the immediate mechanistic
sense of how genes influence phenotype, but, rather, to know what evolutionary
forces maintain genetic variability.
article_processing_charge: No
article_type: original
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Peter
full_name: Keightley, Peter
last_name: Keightley
citation:
ama: Barton NH, Keightley P. Understanding quantitative genetic variation. Nature
Reviews Genetics. 2002;3:11-21. doi:10.1038/nrg700
apa: Barton, N. H., & Keightley, P. (2002). Understanding quantitative genetic
variation. Nature Reviews Genetics. Nature Publishing Group. https://doi.org/10.1038/nrg700
chicago: Barton, Nicholas H, and Peter Keightley. “Understanding Quantitative Genetic
Variation.” Nature Reviews Genetics. Nature Publishing Group, 2002. https://doi.org/10.1038/nrg700.
ieee: N. H. Barton and P. Keightley, “Understanding quantitative genetic variation,”
Nature Reviews Genetics, vol. 3. Nature Publishing Group, pp. 11–21, 2002.
ista: Barton NH, Keightley P. 2002. Understanding quantitative genetic variation.
Nature Reviews Genetics. 3, 11–21.
mla: Barton, Nicholas H., and Peter Keightley. “Understanding Quantitative Genetic
Variation.” Nature Reviews Genetics, vol. 3, Nature Publishing Group, 2002,
pp. 11–21, doi:10.1038/nrg700.
short: N.H. Barton, P. Keightley, Nature Reviews Genetics 3 (2002) 11–21.
date_created: 2018-12-11T12:07:55Z
date_published: 2002-01-01T00:00:00Z
date_updated: 2023-06-06T10:07:00Z
day: '01'
doi: 10.1038/nrg700
extern: '1'
external_id:
pmid:
- '11823787'
intvolume: ' 3'
language:
- iso: eng
month: '01'
oa_version: None
page: 11 - 21
pmid: 1
publication: Nature Reviews Genetics
publication_identifier:
issn:
- 1471-0056
publication_status: published
publisher: Nature Publishing Group
publist_id: '1831'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Understanding quantitative genetic variation
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 3
year: '2002'
...
---
_id: '4262'
abstract:
- lang: eng
text: Natural populations are structured spatially into local populations and genetically
into diverse ‘genetic backgrounds’ defined by different combinations of selected
alleles. If selection maintains genetic backgrounds at constant frequency then
neutral diversity is enhanced. By contrast, if background frequencies fluctuate
then diversity is reduced. Provided that the population size of each background
is large enough, these effects can be described by the structured coalescent process.
Almost all the extant results based on the coalescent deal with a single selected
locus. Yet we know that very large numbers of genes are under selection and that
any substantial effects are likely to be due to the cumulative effects of many
loci. Here, we set up a general framework for the extension of the coalescent
to multilocus scenarios and we use it to study the simplest model, where strong
balancing selection acting on a set of n loci maintains 2n backgrounds at constant
frequencies and at linkage equilibrium. Analytical results show that the expected
linked neutral diversity increases exponentially with the number of selected loci
and can become extremely large. However, simulation results reveal that the structured
coalescent approach breaks down when the number of backgrounds approaches the
population size, because of stochastic fluctuations in background frequencies.
A new method is needed to extend the structured coalescent to cases with large
numbers of backgrounds.
acknowledgement: "We thank B. Charlesworth, D. Charlesworth and F. Depaulis for valuable
discussion and criticism. We are also\r\ngrateful to an anonymous reviewer, who
pointed out an imprecision in the original manuscript. This work was\r\nsupported
by the BBSRC."
article_processing_charge: No
article_type: original
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Arcadio
full_name: Navarro, Arcadio
last_name: Navarro
citation:
ama: 'Barton NH, Navarro A. Extending the coalescent to multilocus systems: the
case of balancing selection. Genetical Research. 2002;79(2):129-139. doi:10.1017/S0016672301005493'
apa: 'Barton, N. H., & Navarro, A. (2002). Extending the coalescent to multilocus
systems: the case of balancing selection. Genetical Research. Cambridge
University Press. https://doi.org/10.1017/S0016672301005493'
chicago: 'Barton, Nicholas H, and Arcadio Navarro. “Extending the Coalescent to
Multilocus Systems: The Case of Balancing Selection.” Genetical Research.
Cambridge University Press, 2002. https://doi.org/10.1017/S0016672301005493.'
ieee: 'N. H. Barton and A. Navarro, “Extending the coalescent to multilocus systems:
the case of balancing selection,” Genetical Research, vol. 79, no. 2. Cambridge
University Press, pp. 129–139, 2002.'
ista: 'Barton NH, Navarro A. 2002. Extending the coalescent to multilocus systems:
the case of balancing selection. Genetical Research. 79(2), 129–139.'
mla: 'Barton, Nicholas H., and Arcadio Navarro. “Extending the Coalescent to Multilocus
Systems: The Case of Balancing Selection.” Genetical Research, vol. 79,
no. 2, Cambridge University Press, 2002, pp. 129–39, doi:10.1017/S0016672301005493.'
short: N.H. Barton, A. Navarro, Genetical Research 79 (2002) 129–139.
date_created: 2018-12-11T12:07:55Z
date_published: 2002-05-23T00:00:00Z
date_updated: 2023-06-06T11:23:19Z
day: '23'
doi: 10.1017/S0016672301005493
extern: '1'
external_id:
pmid:
- '12073551'
intvolume: ' 79'
issue: '2'
language:
- iso: eng
month: '05'
oa_version: None
page: 129 - 139
pmid: 1
publication: Genetical Research
publication_identifier:
issn:
- 0016-6723
publication_status: published
publisher: Cambridge University Press
publist_id: '1832'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Extending the coalescent to multilocus systems: the case of balancing selection'
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 79
year: '2002'
...
---
_id: '4263'
abstract:
- lang: eng
text: 'We introduce a general recursion for the probability of identity in state
of two individuals sampled from a population subject to mutation, migration, and
random drift in a two-dimensional continuum. The recursion allows for the interactions
induced by density-dependent regulation of the population, which are inevitable
in a continuous population. We give explicit series expansions for large neighbourhood
size and for low mutation rates respectively and investigate the accuracy of the
classical Malécot formula for these general models. When neighbourhood size is
small, this formula does not give the identity even over large scales. However,
for large neighbourhood size, it is an accurate approximation which summarises
the local population structure in terms of three quantities: the effective dispersal
rate, σe; the effective population density, ρe; and a local scale, κ, at which
local interactions become significant. The results are illustrated by simulations.'
acknowledgement: This work was supported by grants from the EPSRC (GR/L10048 and an
advanced fellowship for A.M.E.) and NERC (GR3/11635) and by the Darwin Trust of
Edinburgh. We thank Anja Sturm for her assistance with the project and anonymous
reviewers for helpful comments. This paper is dedicated to Charlotte, A.M.E.’s daughter
born during the gestation of the manuscript.
article_processing_charge: No
article_type: original
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Frantz
full_name: Depaulis, Frantz
last_name: Depaulis
- first_name: Alison
full_name: Etheridge, Alison
last_name: Etheridge
citation:
ama: Barton NH, Depaulis F, Etheridge A. Neutral evolution in spatially continuous
populations. Theoretical Population Biology. 2002;61(1):31-48. doi:10.1006/tpbi.2001.1557
apa: Barton, N. H., Depaulis, F., & Etheridge, A. (2002). Neutral evolution
in spatially continuous populations. Theoretical Population Biology. Academic
Press. https://doi.org/10.1006/tpbi.2001.1557
chicago: Barton, Nicholas H, Frantz Depaulis, and Alison Etheridge. “Neutral Evolution
in Spatially Continuous Populations.” Theoretical Population Biology. Academic
Press, 2002. https://doi.org/10.1006/tpbi.2001.1557.
ieee: N. H. Barton, F. Depaulis, and A. Etheridge, “Neutral evolution in spatially
continuous populations,” Theoretical Population Biology, vol. 61, no. 1.
Academic Press, pp. 31–48, 2002.
ista: Barton NH, Depaulis F, Etheridge A. 2002. Neutral evolution in spatially continuous
populations. Theoretical Population Biology. 61(1), 31–48.
mla: Barton, Nicholas H., et al. “Neutral Evolution in Spatially Continuous Populations.”
Theoretical Population Biology, vol. 61, no. 1, Academic Press, 2002, pp.
31–48, doi:10.1006/tpbi.2001.1557.
short: N.H. Barton, F. Depaulis, A. Etheridge, Theoretical Population Biology 61
(2002) 31–48.
date_created: 2018-12-11T12:07:55Z
date_published: 2002-02-01T00:00:00Z
date_updated: 2023-06-06T09:57:49Z
day: '01'
doi: 10.1006/tpbi.2001.1557
extern: '1'
external_id:
pmid:
- '11895381'
intvolume: ' 61'
issue: '1'
language:
- iso: eng
month: '02'
oa_version: None
page: 31 - 48
pmid: 1
publication: Theoretical Population Biology
publication_identifier:
issn:
- 0040-5809
publication_status: published
publisher: Academic Press
publist_id: '1830'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Neutral evolution in spatially continuous populations
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 61
year: '2002'
...
---
_id: '1737'
abstract:
- lang: eng
text: A new solvent-free composite polymer electrolyte consisting of high-molecular
mass polyethylene oxide (PEO) filled with titanium oxide and containing LiI and
I2 was developed. The introduction of the inorganic filler (TiO2 Degussa P25)
into the polymer matrix produces dramatic morphological changes to the host polymer
structure. Upon addition of the inorganic oxide, the surface roughness increases,
with respect to the original polymer and in parallel, the fractal dimension decreases.
Both the thermograms and the atomic force microscope (AFM) pictures confirm the
amorphicity of the composite electrolyte. The polymer sub-units are held together
in a parallel orientation, forming straight long chains of about 500 nm in width,
along which TiO2 spherical particles of about 20-25 nm in diameter are distributed.
The polymer chains separated by the titania particles are arranged in a three-dimensional,
mechanically stable network, that creates free space and voids into which the
iodide/triodide anions can easily migrate. All solid-state dye-sensitized solar
cells fabricated using this composite electrolyte present high efficiencies (typical
maximum incident photon to current efficiency (IPCE) as high as 40% at 520 nm
and overall conversion efficiency (η) of 0.96% (Voc = 0.67 V, Jsc = 2.050 mA/cm2,
FF = 39%) under direct solar irradiation. Further improvement of the photovoltaic
performance is expected by optimization of the electrolyte parameters and of the
cell assembly.
acknowledgement: Financial support from NCSR “Demokritos” (Dimoerevna 598 project),
Empeirikeion Foundation and General Secretariat for Research and Technology of Greece
(EPET II, Greece–France and Greece–Czech Republic bilateral collaboration projects)
is also greatly acknowledged. G. Katsaros thanks the Greek State Scholarships Foundation
(IKY) for fellowship allowance
article_processing_charge: No
author:
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
- first_name: Thomas
full_name: Stergiopoulos, Thomas
last_name: Stergiopoulos
- first_name: Iannis
full_name: Arabatzis, Iannis
last_name: Arabatzis
- first_name: Kyriaki
full_name: Papadokostaki, Kyriaki
last_name: Papadokostaki
- first_name: Polycarpos
full_name: Falaras, Polycarpos
last_name: Falaras
citation:
ama: 'Katsaros G, Stergiopoulos T, Arabatzis I, Papadokostaki K, Falaras P. A solvent-free
composite polymer/inorganic oxide electrolyte for high efficiency solid-state
dye-sensitized solar cells. Journal of Photochemistry and Photobiology A: Chemistry.
2002;149(1-3):191-198. doi:10.1016/S1010-6030(02)00027-8'
apa: 'Katsaros, G., Stergiopoulos, T., Arabatzis, I., Papadokostaki, K., & Falaras,
P. (2002). A solvent-free composite polymer/inorganic oxide electrolyte for high
efficiency solid-state dye-sensitized solar cells. Journal of Photochemistry
and Photobiology A: Chemistry. Elsevier. https://doi.org/10.1016/S1010-6030(02)00027-8'
chicago: 'Katsaros, Georgios, Thomas Stergiopoulos, Iannis Arabatzis, Kyriaki Papadokostaki,
and Polycarpos Falaras. “A Solvent-Free Composite Polymer/Inorganic Oxide Electrolyte
for High Efficiency Solid-State Dye-Sensitized Solar Cells.” Journal of Photochemistry
and Photobiology A: Chemistry. Elsevier, 2002. https://doi.org/10.1016/S1010-6030(02)00027-8.'
ieee: 'G. Katsaros, T. Stergiopoulos, I. Arabatzis, K. Papadokostaki, and P. Falaras,
“A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency
solid-state dye-sensitized solar cells,” Journal of Photochemistry and Photobiology
A: Chemistry, vol. 149, no. 1–3. Elsevier, pp. 191–198, 2002.'
ista: 'Katsaros G, Stergiopoulos T, Arabatzis I, Papadokostaki K, Falaras P. 2002.
A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency
solid-state dye-sensitized solar cells. Journal of Photochemistry and Photobiology
A: Chemistry. 149(1–3), 191–198.'
mla: 'Katsaros, Georgios, et al. “A Solvent-Free Composite Polymer/Inorganic Oxide
Electrolyte for High Efficiency Solid-State Dye-Sensitized Solar Cells.” Journal
of Photochemistry and Photobiology A: Chemistry, vol. 149, no. 1–3, Elsevier,
2002, pp. 191–98, doi:10.1016/S1010-6030(02)00027-8.'
short: 'G. Katsaros, T. Stergiopoulos, I. Arabatzis, K. Papadokostaki, P. Falaras,
Journal of Photochemistry and Photobiology A: Chemistry 149 (2002) 191–198.'
date_created: 2018-12-11T11:53:44Z
date_published: 2002-06-28T00:00:00Z
date_updated: 2023-07-26T08:56:55Z
day: '28'
doi: 10.1016/S1010-6030(02)00027-8
extern: '1'
intvolume: ' 149'
issue: 1-3
language:
- iso: eng
month: '06'
oa_version: None
page: 191 - 198
publication: 'Journal of Photochemistry and Photobiology A: Chemistry'
publication_identifier:
issn:
- 1010-6030
publication_status: published
publisher: Elsevier
publist_id: '5387'
status: public
title: A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency
solid-state dye-sensitized solar cells
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 149
year: '2002'
...
---
_id: '1738'
abstract:
- lang: eng
text: New dyes of the type Ru(II)(bdmpp)(bpy) [where bdmpp is 2,6-bis(3,5-dimethyl-N-pyrazoyl)pyridine
and bpy is 2,2′-bipyridine-4,4′-dicarboxylic acid] are prepared and characterized
by infra-red (IR), mass (MS) and electrospray mass spectroscopy (ES-MS) as well
as 1H NMR (1D and 2D) spectroscopies. The compounds present broad and very high
intensity MLCT absorption bands in the visible and can be chemically anchored
on TiO2 films via ester-like linkage involving carboxylato groups. These complexes
have been tested with success as potential molecular antennas in dye-sensitized
solar cells. Both opaque and transparent nanocrystalline TiO2 thin film electrodes
obtained by a doctor blade technique sensitized by these complexes were incorporated
in a sandwich type regenerative photoelectrochemical solar cell containing 0.1M
LiI +0.01M I2 in propylene carbonate as well as a platinized conductive glass
counter electrode. The cell was characterized by Raman spectroscopy under anodic
and cathodic bias. Two new vibration bands were observed in the lower frequency
region. The first one at 112 cm-1 is due to tri-iodide formed on the photoactive
electrode, and the second one at 167 cm-1 is a sign of the dye/iodide interaction
and corresponds to a vibration in a chemically stable "DI" intermediate
species. Under direct sunlight illumination (solar irradiance of 60 mW/cm2) by
using a composite polymer solid state electrolyte, the cell ITO/TiO2/[Ru(II)(bdmpp)(bpy)(NCS)](PF6)/electrolyte/Pt-ITO
produced a continuous photocurrent as high as 4.29mA/cm2, and gave IPCE values
about half of the corresponding values obtained by the standard N3 dye under the
same conditions. The photovoltage is about 600 mV and the overall energy conversion
cell's efficiency is as high as 1.72%.
author:
- first_name: Polycarpos
full_name: Falaras, Polycarpos
last_name: Falaras
- first_name: Katerina
full_name: Chryssou, Katerina
last_name: Chryssou
- first_name: Thomas
full_name: Stergiopoulos, Thomas
last_name: Stergiopoulos
- first_name: Ioannis
full_name: Arabatzis, Ioannis M
last_name: Arabatzis
- first_name: Georgios
full_name: Georgios Katsaros
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
- first_name: Vincent
full_name: Catalano, Vincent J
last_name: Catalano
- first_name: Raif
full_name: Kurtaran, Raif
last_name: Kurtaran
- first_name: Anne
full_name: Hugot-Le Goff, Anne
last_name: Hugot Le Goff
- first_name: Marie
full_name: Bernard, Marie C
last_name: Bernard
citation:
ama: 'Falaras P, Chryssou K, Stergiopoulos T, et al. Dye-sensitization of titanium
dioxide thin films by Ru(II)-bpp-bpy complexes. In: Vol 4801. SPIE; 2002:125-135.
doi:10.1117/12.452446'
apa: Falaras, P., Chryssou, K., Stergiopoulos, T., Arabatzis, I., Katsaros, G.,
Catalano, V., … Bernard, M. (2002). Dye-sensitization of titanium dioxide thin
films by Ru(II)-bpp-bpy complexes (Vol. 4801, pp. 125–135). Presented at the Organic
Photovoltaics, SPIE. https://doi.org/10.1117/12.452446
chicago: Falaras, Polycarpos, Katerina Chryssou, Thomas Stergiopoulos, Ioannis Arabatzis,
Georgios Katsaros, Vincent Catalano, Raif Kurtaran, Anne Hugot Le Goff, and Marie
Bernard. “Dye-Sensitization of Titanium Dioxide Thin Films by Ru(II)-Bpp-Bpy Complexes,”
4801:125–35. SPIE, 2002. https://doi.org/10.1117/12.452446.
ieee: P. Falaras et al., “Dye-sensitization of titanium dioxide thin films
by Ru(II)-bpp-bpy complexes,” presented at the Organic Photovoltaics, 2002, vol.
4801, pp. 125–135.
ista: Falaras P, Chryssou K, Stergiopoulos T, Arabatzis I, Katsaros G, Catalano
V, Kurtaran R, Hugot Le Goff A, Bernard M. 2002. Dye-sensitization of titanium
dioxide thin films by Ru(II)-bpp-bpy complexes. Organic Photovoltaics vol. 4801,
125–135.
mla: Falaras, Polycarpos, et al. Dye-Sensitization of Titanium Dioxide Thin Films
by Ru(II)-Bpp-Bpy Complexes. Vol. 4801, SPIE, 2002, pp. 125–35, doi:10.1117/12.452446.
short: P. Falaras, K. Chryssou, T. Stergiopoulos, I. Arabatzis, G. Katsaros, V.
Catalano, R. Kurtaran, A. Hugot Le Goff, M. Bernard, in:, SPIE, 2002, pp. 125–135.
conference:
name: Organic Photovoltaics
date_created: 2018-12-11T11:53:45Z
date_published: 2002-01-01T00:00:00Z
date_updated: 2021-01-12T06:52:53Z
day: '01'
doi: 10.1117/12.452446
extern: 1
intvolume: ' 4801'
month: '01'
page: 125 - 135
publication_status: published
publisher: SPIE
publist_id: '5385'
quality_controlled: 0
status: public
title: Dye-sensitization of titanium dioxide thin films by Ru(II)-bpp-bpy complexes
type: conference
volume: 4801
year: '2002'
...
---
_id: '1739'
abstract:
- lang: eng
text: Poly(ethylene oxide)/titania polymer electrolyte based photoelectrochemical
cells have been fabricated with Ru(dcbpy)2(NCS)2 complex as the sensitizer and
nanoporous TiO2 films as photoanodes. The introduction of the titania filler into
the poly(ethylene oxide) matrix reduces the crystallinity of the polymer and enhances
the mobility of the 1-/13 - redox couple, resulting in outstanding overall conversion
efficiency (4.2% under direct sunlight illumination) of the corresponding dye-sensitized
nanocrystalline TiO2 solar cell, one of the best efficiencies reported to date
for a solid-state device.
acknowledgement: 'Financial support from NCSR “Demokritos” and GSRT-Greece is greatly
acknowledged. '
author:
- first_name: Thomas
full_name: Stergiopoulos, Thomas
last_name: Stergiopoulos
- first_name: Iannis
full_name: Arabatzis, Iannis M
last_name: Arabatzis
- first_name: Georgios
full_name: Georgios Katsaros
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
- first_name: Polycarpos
full_name: Falaras, Polycarpos
last_name: Falaras
citation:
ama: Stergiopoulos T, Arabatzis I, Katsaros G, Falaras P. Binary Polyethylene Oxide/Titania
Solid-State Redox Electrolyte for Highly Efficient Nanocrystalline TiO2 Photoelectrochemical
Cells. Nano Letters. 2002;2(11):1259-1261. doi:10.1021/nl025798u
apa: Stergiopoulos, T., Arabatzis, I., Katsaros, G., & Falaras, P. (2002). Binary
Polyethylene Oxide/Titania Solid-State Redox Electrolyte for Highly Efficient
Nanocrystalline TiO2 Photoelectrochemical Cells. Nano Letters. American
Chemical Society. https://doi.org/10.1021/nl025798u
chicago: Stergiopoulos, Thomas, Iannis Arabatzis, Georgios Katsaros, and Polycarpos
Falaras. “Binary Polyethylene Oxide/Titania Solid-State Redox Electrolyte for
Highly Efficient Nanocrystalline TiO2 Photoelectrochemical Cells.” Nano Letters.
American Chemical Society, 2002. https://doi.org/10.1021/nl025798u.
ieee: T. Stergiopoulos, I. Arabatzis, G. Katsaros, and P. Falaras, “Binary Polyethylene
Oxide/Titania Solid-State Redox Electrolyte for Highly Efficient Nanocrystalline
TiO2 Photoelectrochemical Cells,” Nano Letters, vol. 2, no. 11. American
Chemical Society, pp. 1259–1261, 2002.
ista: Stergiopoulos T, Arabatzis I, Katsaros G, Falaras P. 2002. Binary Polyethylene
Oxide/Titania Solid-State Redox Electrolyte for Highly Efficient Nanocrystalline
TiO2 Photoelectrochemical Cells. Nano Letters. 2(11), 1259–1261.
mla: Stergiopoulos, Thomas, et al. “Binary Polyethylene Oxide/Titania Solid-State
Redox Electrolyte for Highly Efficient Nanocrystalline TiO2 Photoelectrochemical
Cells.” Nano Letters, vol. 2, no. 11, American Chemical Society, 2002,
pp. 1259–61, doi:10.1021/nl025798u.
short: T. Stergiopoulos, I. Arabatzis, G. Katsaros, P. Falaras, Nano Letters 2 (2002)
1259–1261.
date_created: 2018-12-11T11:53:45Z
date_published: 2002-11-01T00:00:00Z
date_updated: 2021-01-12T06:52:53Z
day: '01'
doi: 10.1021/nl025798u
extern: 1
intvolume: ' 2'
issue: '11'
month: '11'
page: 1259 - 1261
publication: Nano Letters
publication_status: published
publisher: American Chemical Society
publist_id: '5386'
quality_controlled: 0
status: public
title: Binary Polyethylene Oxide/Titania Solid-State Redox Electrolyte for Highly
Efficient Nanocrystalline TiO2 Photoelectrochemical Cells
type: journal_article
volume: 2
year: '2002'
...
---
_id: '17723'
abstract:
- lang: eng
text: "The recent discovery of bright quasars around redshift z=6 suggests that
black holes (BHs) with masses in excess of 10^9 Msun have already assembled at
a very early stage in the evolution of the universe. An alternative interpretation
is that these quasars are powered by less massive BHs, but their fluxes are strongly
magnified through gravitational lensing by intervening galaxies. Here we analyze
the flux distribution of the Ly alpha emission of the quasar with the highest
known redshift, SDSS 1030+0524, at z=6.28. We show that this object could not
have been magnified by lensing by more than a factor of five. The constraint arises
from the large observed size, 30 (comoving) Mpc, of the ionized region around
this quasar, and relies crucially only on the assumption that the quasar is embedded
in a largely neutral IGM. Based on the line/continuum ratio of SDSS 1030+0524,
we argue further that this quasar also cannot be beamed by a significant factor.
We conclude that the minimum mass for its resident BH is 4 x 10^8 Msun (for magnification
by a factor of five); if the mass is this low, then the quasars had to switch
on prior to redshift z=9.\r\nFrom the size of the ionized region, we are also
able to place an absolute lower bound on the age of this quasar at t > 2 x 10^7
years."
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Renyue
full_name: Cen, Renyue
last_name: Cen
citation:
ama: Haiman Z, Cen R. A constraint on the gravitational lensing magnification and
age of the redshift z = 6.28 Quasar SDSS 1030+0524. The Astrophysical Journal.
2002;578(2):702-707. doi:10.1086/342610
apa: Haiman, Z., & Cen, R. (2002). A constraint on the gravitational lensing
magnification and age of the redshift z = 6.28 Quasar SDSS 1030+0524. The Astrophysical
Journal. American Astronomical Society. https://doi.org/10.1086/342610
chicago: Haiman, Zoltán, and Renyue Cen. “A Constraint on the Gravitational Lensing
Magnification and Age of the Redshift z = 6.28 Quasar SDSS 1030+0524.” The
Astrophysical Journal. American Astronomical Society, 2002. https://doi.org/10.1086/342610.
ieee: Z. Haiman and R. Cen, “A constraint on the gravitational lensing magnification
and age of the redshift z = 6.28 Quasar SDSS 1030+0524,” The Astrophysical
Journal, vol. 578, no. 2. American Astronomical Society, pp. 702–707, 2002.
ista: Haiman Z, Cen R. 2002. A constraint on the gravitational lensing magnification
and age of the redshift z = 6.28 Quasar SDSS 1030+0524. The Astrophysical Journal.
578(2), 702–707.
mla: Haiman, Zoltán, and Renyue Cen. “A Constraint on the Gravitational Lensing
Magnification and Age of the Redshift z = 6.28 Quasar SDSS 1030+0524.” The
Astrophysical Journal, vol. 578, no. 2, American Astronomical Society, 2002,
pp. 702–07, doi:10.1086/342610.
short: Z. Haiman, R. Cen, The Astrophysical Journal 578 (2002) 702–707.
date_created: 2024-09-06T09:11:03Z
date_published: 2002-10-20T00:00:00Z
date_updated: 2024-09-25T14:06:28Z
day: '20'
doi: 10.1086/342610
extern: '1'
intvolume: ' 578'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/342610
month: '10'
oa: 1
oa_version: Published Version
page: 702-707
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: A constraint on the gravitational lensing magnification and age of the redshift
z = 6.28 Quasar SDSS 1030+0524
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 578
year: '2002'
...
---
_id: '17739'
abstract:
- lang: eng
text: An extensive sample of galaxy clusters will be available in the coming years,
detected through their Sunyaev-Zeldovich effect (SZE). We use a semianalytic model
to study the scientific yield of combining SZE data with X-ray and optical follow-up
observations. If clusters at a given redshift z0 can be identified with virialized,
spherical halos, they populate a well-defined "fundamental plane" (FP) in the
parameter space of the three observables virial temperature (T), total Sunyaev-Zeldovich
flux decrement (ΔSν), and angular size (θ). The location and orientation of the
FP, as well as its redshift evolution, are sensitive to both the internal evolution
of clusters and to the underlying cosmological parameters. We show that if clusters
are not standard candles (e.g., because of feedback or energy injection), then
this can be inferred from the FP. Likewise, we study the dependence of the FP
on the cosmological parameters h, σ8, and Ω0, and quantify future constraints
on these parameters. We also show that in the absence of any nongravitational
effects, the scatter in the (ΔSν,T)-plane is significantly smaller than in either
the (θ,T) or the (θ,ΔSν) planes. As a result, the ΔSν-T relation can be an exceptionally
sensitive probe of both cluster physics and cosmological parameters. A comparison
of the amount of scatter in these three scaling relations will test the origin
(cosmological vs. stochastic) of the scatter.
article_processing_charge: No
article_type: original
author:
- first_name: Licia
full_name: Verde, Licia
last_name: Verde
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: David N.
full_name: Spergel, David N.
last_name: Spergel
citation:
ama: Verde L, Haiman Z, Spergel DN. Are clusters standard candles? Galaxy cluster
scaling relations with the Sunyaev‐Zeldovich effect. The Astrophysical Journal.
2002;581(1):5-19. doi:10.1086/344134
apa: Verde, L., Haiman, Z., & Spergel, D. N. (2002). Are clusters standard candles?
Galaxy cluster scaling relations with the Sunyaev‐Zeldovich effect. The Astrophysical
Journal. American Astronomical Society. https://doi.org/10.1086/344134
chicago: Verde, Licia, Zoltán Haiman, and David N. Spergel. “Are Clusters Standard
Candles? Galaxy Cluster Scaling Relations with the Sunyaev‐Zeldovich Effect.”
The Astrophysical Journal. American Astronomical Society, 2002. https://doi.org/10.1086/344134.
ieee: L. Verde, Z. Haiman, and D. N. Spergel, “Are clusters standard candles? Galaxy
cluster scaling relations with the Sunyaev‐Zeldovich effect,” The Astrophysical
Journal, vol. 581, no. 1. American Astronomical Society, pp. 5–19, 2002.
ista: Verde L, Haiman Z, Spergel DN. 2002. Are clusters standard candles? Galaxy
cluster scaling relations with the Sunyaev‐Zeldovich effect. The Astrophysical
Journal. 581(1), 5–19.
mla: Verde, Licia, et al. “Are Clusters Standard Candles? Galaxy Cluster Scaling
Relations with the Sunyaev‐Zeldovich Effect.” The Astrophysical Journal,
vol. 581, no. 1, American Astronomical Society, 2002, pp. 5–19, doi:10.1086/344134.
short: L. Verde, Z. Haiman, D.N. Spergel, The Astrophysical Journal 581 (2002) 5–19.
date_created: 2024-09-06T09:22:05Z
date_published: 2002-12-10T00:00:00Z
date_updated: 2024-09-26T14:09:02Z
day: '10'
doi: 10.1086/344134
extern: '1'
intvolume: ' 581'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/344134
month: '12'
oa: 1
oa_version: Published Version
page: 5-19
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Are clusters standard candles? Galaxy cluster scaling relations with the Sunyaev‐Zeldovich
effect
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 581
year: '2002'
...
---
_id: '17746'
abstract:
- lang: eng
text: For a source of Lyα radiation embedded in a neutral intergalactic medium (IGM)
prior to the reionization epoch, the Lyα emission line is strongly suppressed
by the intervening IGM. The damping wing of the so-called Gunn-Peterson trough
can extend to the red side of the emission line and erase a significant fraction
of the total line flux. However, the transmitted fraction increases with the size
of the local cosmological H II region surrounding the source, and therefore with
the ionizing luminosity and age of the source. Motivated by the recent discovery
of a Lyα-emitting galaxy at a redshift z = 6.56 (Hu et al.), possibly prior to
the reionization of the IGM, we revisit the effects of a neutral IGM on the Lyα
emission line. We show that for faint sources with little or even no ionizing
continuum, a sufficiently broad (Δv ≳ 300 km s^-1) emission line can still remain
observable. In particular, the line detected by Hu et al. is consistent with a
source embedded in a neutral IGM. We provide characterizations of the asymmetry
and total transmitted flux of the Lyα line as functions of the ionizing emissivity
of its source. We argue that a statistical sample of Lyα emitters extending beyond
the reionization redshift can be a useful probe of reionization.
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Haiman Z. The detectability of high-redshift Lyα emission lines prior to the
reionization of the universe. The Astrophysical Journal. 2002;576(1):L1-L4.
doi:10.1086/343101
apa: Haiman, Z. (2002). The detectability of high-redshift Lyα emission lines prior
to the reionization of the universe. The Astrophysical Journal. American
Astronomical Society. https://doi.org/10.1086/343101
chicago: Haiman, Zoltán. “The Detectability of High-Redshift Lyα Emission Lines
Prior to the Reionization of the Universe.” The Astrophysical Journal.
American Astronomical Society, 2002. https://doi.org/10.1086/343101.
ieee: Z. Haiman, “The detectability of high-redshift Lyα emission lines prior to
the reionization of the universe,” The Astrophysical Journal, vol. 576,
no. 1. American Astronomical Society, pp. L1–L4, 2002.
ista: Haiman Z. 2002. The detectability of high-redshift Lyα emission lines prior
to the reionization of the universe. The Astrophysical Journal. 576(1), L1–L4.
mla: Haiman, Zoltán. “The Detectability of High-Redshift Lyα Emission Lines Prior
to the Reionization of the Universe.” The Astrophysical Journal, vol. 576,
no. 1, American Astronomical Society, 2002, pp. L1–4, doi:10.1086/343101.
short: Z. Haiman, The Astrophysical Journal 576 (2002) L1–L4.
date_created: 2024-09-06T09:34:46Z
date_published: 2002-07-31T00:00:00Z
date_updated: 2024-09-26T14:51:17Z
day: '31'
doi: 10.1086/343101
extern: '1'
intvolume: ' 576'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/343101
month: '07'
oa: 1
oa_version: Published Version
page: L1-L4
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: The detectability of high-redshift Lyα emission lines prior to the reionization
of the universe
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 576
year: '2002'
...
---
_id: '17779'
abstract:
- lang: eng
text: The first generation of stars is thought to have formed in low-mass halos
with Tvir < 10^4 K where H2 cooling is paramount. However, the efficiency of H2
formation and cooling in these halos may have been severely limited by feedback
processes. In this paper we investigate the radiative cooling and collapse of
halos with virial temperatures Tvir > 10^4 K, i.e., those that can cool in the
absence of H2 via neutral atomic lines. The evolution of these halos differs from
their less massive counterparts. Efficient atomic line radiation allows rapid
cooling to ~8000 K; subsequently the gas can contract nearly isothermally at this
temperature. In the absence of H2 molecules, the gas would likely settle into
a locally stable disk, and only disks with unusually low spin would be unstable.
However, we find that the initial atomic line cooling leaves a large, out-of-equilibrium
residual free electron fraction. This allows the molecular fraction to build up
to a universal value of x ≈ 10^-3, almost independently of initial density and
temperature. We show that this is a nonequilibrium freeze-out value that can be
understood in terms of timescale arguments. Unlike in less massive halos, H2 formation
and cooling is largely impervious to feedback from external UV fields, due to
the high initial densities achieved by atomic cooling. The newly formed molecules
cool the gas further to ~100 K and allow the gas to fragment on scales of a few
times 100 M☉. We investigate the importance of various feedback effects such as
H2 photodissociation from internal UV fields and radiation pressure due to Lyα
photon trapping, which are likely to regulate the efficiency of star formation.
article_processing_charge: No
article_type: original
author:
- first_name: S. Peng
full_name: Oh, S. Peng
last_name: Oh
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Oh SP, Haiman Z. Second‐generation objects in the universe: Radiative cooling
and collapse of halos with virial temperatures above 10^4 K. The Astrophysical
Journal. 2002;569(2):558-572. doi:10.1086/339393'
apa: 'Oh, S. P., & Haiman, Z. (2002). Second‐generation objects in the universe:
Radiative cooling and collapse of halos with virial temperatures above 10^4 K.
The Astrophysical Journal. American Astronomical Society. https://doi.org/10.1086/339393'
chicago: 'Oh, S. Peng, and Zoltán Haiman. “Second‐generation Objects in the Universe:
Radiative Cooling and Collapse of Halos with Virial Temperatures above 10^4 K.”
The Astrophysical Journal. American Astronomical Society, 2002. https://doi.org/10.1086/339393.'
ieee: 'S. P. Oh and Z. Haiman, “Second‐generation objects in the universe: Radiative
cooling and collapse of halos with virial temperatures above 10^4 K,” The Astrophysical
Journal, vol. 569, no. 2. American Astronomical Society, pp. 558–572, 2002.'
ista: 'Oh SP, Haiman Z. 2002. Second‐generation objects in the universe: Radiative
cooling and collapse of halos with virial temperatures above 10^4 K. The Astrophysical
Journal. 569(2), 558–572.'
mla: 'Oh, S. Peng, and Zoltán Haiman. “Second‐generation Objects in the Universe:
Radiative Cooling and Collapse of Halos with Virial Temperatures above 10^4 K.”
The Astrophysical Journal, vol. 569, no. 2, American Astronomical Society,
2002, pp. 558–72, doi:10.1086/339393.'
short: S.P. Oh, Z. Haiman, The Astrophysical Journal 569 (2002) 558–572.
date_created: 2024-09-06T10:14:24Z
date_published: 2002-04-20T00:00:00Z
date_updated: 2024-09-30T12:04:29Z
day: '20'
doi: 10.1086/339393
extern: '1'
intvolume: ' 569'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1086/339393
month: '04'
oa: 1
oa_version: Published Version
page: 558-572
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Second‐generation objects in the universe: Radiative cooling and collapse
of halos with virial temperatures above 10^4 K'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 569
year: '2002'
...
---
OA_type: free access
_id: '17798'
abstract:
- lang: eng
text: Recent discoveries by the Sloan Digital Sky Survey (SDSS) of four bright z
~ 6 quasars could constrain the mechanism by which the supermassive black holes
powering these sources are assembled. Here we compute the probability that the
fluxes of the quasars are strongly amplified by gravitational lensing and therefore
the likelihood that the black hole masses are overestimated when they are inferred
assuming Eddington luminosities. The poorly constrained shape of the intrinsic
quasar luminosity function (LF) at redshift ~6 results in a large range of possible
lensing probabilities. If the LF is either steep or extends to faint magnitudes,
the probability for amplification by a factor μ ≳ 10 (and with only one image
detectable by SDSS) can reach essentially 100%. We show that future observations,
in particular, of either the current four quasars at the high angular resolution
provided by the Hubble Space Telescope or an increased sample of ~20 z ~ 6 quasars
at the current angular resolution, should either discover several gravitational
lenses or else provide interesting new constraints on the shape of the z ~ 6 quasar
LF.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Julia M.
full_name: Comerford, Julia M.
last_name: Comerford
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Joop
full_name: Schaye, Joop
last_name: Schaye
citation:
ama: Comerford JM, Haiman Z, Schaye J. Constraining the Redshift z ~ 6 quasar luminosity
function using gravitational lensing. The Astrophysical Journal. 2002;580:63-72.
doi:10.1086/343116
apa: Comerford, J. M., Haiman, Z., & Schaye, J. (2002). Constraining the Redshift
z ~ 6 quasar luminosity function using gravitational lensing. The Astrophysical
Journal. American Astronomical Society. https://doi.org/10.1086/343116
chicago: Comerford, Julia M., Zoltán Haiman, and Joop Schaye. “Constraining the
Redshift z ~ 6 Quasar Luminosity Function Using Gravitational Lensing.” The
Astrophysical Journal. American Astronomical Society, 2002. https://doi.org/10.1086/343116.
ieee: J. M. Comerford, Z. Haiman, and J. Schaye, “Constraining the Redshift z ~
6 quasar luminosity function using gravitational lensing,” The Astrophysical
Journal, vol. 580. American Astronomical Society, pp. 63–72, 2002.
ista: Comerford JM, Haiman Z, Schaye J. 2002. Constraining the Redshift z ~ 6 quasar
luminosity function using gravitational lensing. The Astrophysical Journal. 580,
63–72.
mla: Comerford, Julia M., et al. “Constraining the Redshift z ~ 6 Quasar Luminosity
Function Using Gravitational Lensing.” The Astrophysical Journal, vol.
580, American Astronomical Society, 2002, pp. 63–72, doi:10.1086/343116.
short: J.M. Comerford, Z. Haiman, J. Schaye, The Astrophysical Journal 580 (2002)
63–72.
date_created: 2024-09-06T10:29:51Z
date_published: 2002-11-20T00:00:00Z
date_updated: 2024-11-12T09:40:33Z
day: '20'
doi: 10.1086/343116
extern: '1'
external_id:
arxiv:
- astro-ph/0206441
intvolume: ' 580'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0206441
month: '11'
oa: 1
oa_version: Preprint
page: 63-72
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Constraining the Redshift z ~ 6 quasar luminosity function using gravitational
lensing
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 580
year: '2002'
...
---
OA_type: free access
_id: '17799'
abstract:
- lang: eng
text: The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey
that will eventually cover approximately one-quarter of the celestial sphere and
collect spectra of ≈106 galaxies, 100,000 quasars, 30,000 stars, and 30,000 serendipity
targets. In 2001 June, the SDSS released to the general astronomical community
its early data release, roughly 462 deg2 of imaging data including almost 14 million
detected objects and 54,008 follow-up spectra. The imaging data were collected
in drift-scan mode in five bandpasses (u, g, r, i, and z); our 95% completeness
limits for stars are 22.0, 22.2, 22.2, 21.3, and 20.5, respectively. The photometric
calibration is reproducible to 5%, 3%, 3%, 3%, and 5%, respectively. The spectra
are flux- and wavelength-calibrated, with 4096 pixels from 3800 to 9200 Å at R
≈ 1800. We present the means by which these data are distributed to the astronomical
community, descriptions of the hardware used to obtain the data, the software
used for processing the data, the measured quantities for each observed object,
and an overview of the properties of this data set.
article_processing_charge: No
article_type: original
author:
- first_name: Chris
full_name: Stoughton, Chris
last_name: Stoughton
- first_name: Robert H.
full_name: Lupton, Robert H.
last_name: Lupton
- first_name: Mariangela
full_name: Bernardi, Mariangela
last_name: Bernardi
- first_name: Michael R.
full_name: Blanton, Michael R.
last_name: Blanton
- first_name: Scott
full_name: Burles, Scott
last_name: Burles
- first_name: Francisco J.
full_name: Castander, Francisco J.
last_name: Castander
- first_name: A. J.
full_name: Connolly, A. J.
last_name: Connolly
- first_name: Daniel J.
full_name: Eisenstein, Daniel J.
last_name: Eisenstein
- first_name: Joshua A.
full_name: Frieman, Joshua A.
last_name: Frieman
- first_name: G. S.
full_name: Hennessy, G. S.
last_name: Hennessy
- first_name: Robert B.
full_name: Hindsley, Robert B.
last_name: Hindsley
- first_name: Željko
full_name: Ivezić, Željko
last_name: Ivezić
- first_name: Stephen
full_name: Kent, Stephen
last_name: Kent
- first_name: Peter Z.
full_name: Kunszt, Peter Z.
last_name: Kunszt
- first_name: Brian C.
full_name: Lee, Brian C.
last_name: Lee
- first_name: Avery
full_name: Meiksin, Avery
last_name: Meiksin
- first_name: Jeffrey A.
full_name: Munn, Jeffrey A.
last_name: Munn
- first_name: Heidi Jo
full_name: Newberg, Heidi Jo
last_name: Newberg
- first_name: R. C.
full_name: Nichol, R. C.
last_name: Nichol
- first_name: Tom
full_name: Nicinski, Tom
last_name: Nicinski
- first_name: Jeffrey R.
full_name: Pier, Jeffrey R.
last_name: Pier
- first_name: Gordon T.
full_name: Richards, Gordon T.
last_name: Richards
- first_name: Michael W.
full_name: Richmond, Michael W.
last_name: Richmond
- first_name: David J.
full_name: Schlegel, David J.
last_name: Schlegel
- first_name: J. Allyn
full_name: Smith, J. Allyn
last_name: Smith
- first_name: Michael A.
full_name: Strauss, Michael A.
last_name: Strauss
- first_name: Mark
full_name: SubbaRao, Mark
last_name: SubbaRao
- first_name: Alexander S.
full_name: Szalay, Alexander S.
last_name: Szalay
- first_name: Aniruddha R.
full_name: Thakar, Aniruddha R.
last_name: Thakar
- first_name: Douglas L.
full_name: Tucker, Douglas L.
last_name: Tucker
- first_name: Daniel E.
full_name: Vanden Berk, Daniel E.
last_name: Vanden Berk
- first_name: Brian
full_name: Yanny, Brian
last_name: Yanny
- first_name: Jennifer K.
full_name: Adelman, Jennifer K.
last_name: Adelman
- first_name: John E.
full_name: Anderson, Jr., John E.
last_name: Anderson, Jr.
- first_name: Scott F.
full_name: Anderson, Scott F.
last_name: Anderson
- first_name: James
full_name: Annis, James
last_name: Annis
- first_name: Neta A.
full_name: Bahcall, Neta A.
last_name: Bahcall
- first_name: J. A.
full_name: Bakken, J. A.
last_name: Bakken
- first_name: Matthias
full_name: Bartelmann, Matthias
last_name: Bartelmann
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full_name: Bastian, Steven
last_name: Bastian
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full_name: Bauer, Amanda
last_name: Bauer
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full_name: Berman, Eileen
last_name: Berman
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full_name: Böhringer, Hans
last_name: Böhringer
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full_name: Boroski, William N.
last_name: Boroski
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full_name: Bracker, Steve
last_name: Bracker
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full_name: Briegel, Charlie
last_name: Briegel
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last_name: Briggs
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full_name: Brinkmann, J.
last_name: Brinkmann
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full_name: Brunner, Robert
last_name: Brunner
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last_name: Carey
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last_name: Colestock
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full_name: Csabai, István
last_name: Csabai
- first_name: Paul C.
full_name: Czarapata, Paul C.
last_name: Czarapata
- first_name: Julianne
full_name: Dalcanton, Julianne
last_name: Dalcanton
- first_name: Arthur F.
full_name: Davidsen, Arthur F.
last_name: Davidsen
- first_name: John Eric
full_name: Davis, John Eric
last_name: Davis
- first_name: Walter
full_name: Dehnen, Walter
last_name: Dehnen
- first_name: Scott
full_name: Dodelson, Scott
last_name: Dodelson
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full_name: Doi, Mamoru
last_name: Doi
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full_name: Dombeck, Tom
last_name: Dombeck
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full_name: Donahue, Megan
last_name: Donahue
- first_name: Nancy
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last_name: Ellman
- first_name: Brian R.
full_name: Elms, Brian R.
last_name: Elms
- first_name: Michael L.
full_name: Evans, Michael L.
last_name: Evans
- first_name: Laurent
full_name: Eyer, Laurent
last_name: Eyer
- first_name: Xiaohui
full_name: Fan, Xiaohui
last_name: Fan
- first_name: Glenn R.
full_name: Federwitz, Glenn R.
last_name: Federwitz
- first_name: Scott
full_name: Friedman, Scott
last_name: Friedman
- first_name: Masataka
full_name: Fukugita, Masataka
last_name: Fukugita
- first_name: Roy
full_name: Gal, Roy
last_name: Gal
- first_name: Bruce
full_name: Gillespie, Bruce
last_name: Gillespie
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full_name: Glazebrook, Karl
last_name: Glazebrook
- first_name: Jim
full_name: Gray, Jim
last_name: Gray
- first_name: Eva K.
full_name: Grebel, Eva K.
last_name: Grebel
- first_name: Bruce
full_name: Greenawalt, Bruce
last_name: Greenawalt
- first_name: Gretchen
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last_name: Greene
- first_name: James E.
full_name: Gunn, James E.
last_name: Gunn
- first_name: Ernst
full_name: de Haas, Ernst
last_name: de Haas
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Merle
full_name: Haldeman, Merle
last_name: Haldeman
- first_name: Patrick B.
full_name: Hall, Patrick B.
last_name: Hall
- first_name: Masaru
full_name: Hamabe, Masaru
last_name: Hamabe
- first_name: Brad
full_name: Hansen, Brad
last_name: Hansen
- first_name: Frederick H.
full_name: Harris, Frederick H.
last_name: Harris
- first_name: Hugh
full_name: Harris, Hugh
last_name: Harris
- first_name: Michael
full_name: Harvanek, Michael
last_name: Harvanek
- first_name: Suzanne L.
full_name: Hawley, Suzanne L.
last_name: Hawley
- first_name: J. J. E.
full_name: Hayes, J. J. E.
last_name: Hayes
- first_name: Timothy M.
full_name: Heckman, Timothy M.
last_name: Heckman
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full_name: Helmi, Amina
last_name: Helmi
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full_name: Henden, Arne
last_name: Henden
- first_name: Craig J.
full_name: Hogan, Craig J.
last_name: Hogan
- first_name: David W.
full_name: Hogg, David W.
last_name: Hogg
- first_name: Donald J.
full_name: Holmgren, Donald J.
last_name: Holmgren
- first_name: Jon
full_name: Holtzman, Jon
last_name: Holtzman
- first_name: Chih-Hao
full_name: Huang, Chih-Hao
last_name: Huang
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last_name: Hull
- first_name: Shin-Ichi
full_name: Ichikawa, Shin-Ichi
last_name: Ichikawa
- first_name: Takashi
full_name: Ichikawa, Takashi
last_name: Ichikawa
- first_name: David E.
full_name: Johnston, David E.
last_name: Johnston
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full_name: Kauffmann, Guinevere
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full_name: Kim, Rita S. J.
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full_name: Kimball, Tim
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- first_name: D. Q.
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- first_name: R. French
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last_name: Loomis
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last_name: Loveday
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- first_name: P. M.
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- first_name: Bruce
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- first_name: H. J.
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- first_name: David G.
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- first_name: Osamu
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- first_name: Vijay K.
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last_name: Nash
- first_name: Eric H.
full_name: Neilsen, Jr., Eric H.
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- first_name: Peter R.
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last_name: Newman
- first_name: Atsuko
full_name: Nitta, Atsuko
last_name: Nitta
- first_name: Michael
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- first_name: Sadanori
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- first_name: Jeremiah P.
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- first_name: Russell
full_name: Owen, Russell
last_name: Owen
- first_name: A. George
full_name: Pauls, A. George
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- first_name: John
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- first_name: R. S.
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- first_name: Donald
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- first_name: Adrian
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- first_name: Thomas R.
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- first_name: Ron
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- first_name: Claudio H.
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- first_name: Hans-Walter
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- first_name: Constance M.
full_name: Rockosi, Constance M.
last_name: Rockosi
- first_name: Robert
full_name: Rosner, Robert
last_name: Rosner
- first_name: Kurt
full_name: Ruthmansdorfer, Kurt
last_name: Ruthmansdorfer
- first_name: Dale
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last_name: Sandford
- first_name: Donald P.
full_name: Schneider, Donald P.
last_name: Schneider
- first_name: Ryan
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- first_name: Maki
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- first_name: Stephanie A.
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full_name: Stebbins, Albert
last_name: Stebbins
- first_name: Christopher
full_name: Stubbs, Christopher
last_name: Stubbs
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full_name: Szapudi, István
last_name: Szapudi
- first_name: Paula
full_name: Szkody, Paula
last_name: Szkody
- first_name: Gyula P.
full_name: Szokoly, Gyula P.
last_name: Szokoly
- first_name: Serge
full_name: Tabachnik, Serge
last_name: Tabachnik
- first_name: Zlatan
full_name: Tsvetanov, Zlatan
last_name: Tsvetanov
- first_name: Alan
full_name: Uomoto, Alan
last_name: Uomoto
- first_name: Michael S.
full_name: Vogeley, Michael S.
last_name: Vogeley
- first_name: Wolfgang
full_name: Voges, Wolfgang
last_name: Voges
- first_name: Patrick
full_name: Waddell, Patrick
last_name: Waddell
- first_name: René
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last_name: Walterbos
- first_name: Shu-i
full_name: Wang, Shu-i
last_name: Wang
- first_name: Masaru
full_name: Watanabe, Masaru
last_name: Watanabe
- first_name: David H.
full_name: Weinberg, David H.
last_name: Weinberg
- first_name: Richard L.
full_name: White, Richard L.
last_name: White
- first_name: Simon D. M.
full_name: White, Simon D. M.
last_name: White
- first_name: Brian
full_name: Wilhite, Brian
last_name: Wilhite
- first_name: David
full_name: Wolfe, David
last_name: Wolfe
- first_name: Naoki
full_name: Yasuda, Naoki
last_name: Yasuda
- first_name: Donald G.
full_name: York, Donald G.
last_name: York
- first_name: Idit
full_name: Zehavi, Idit
last_name: Zehavi
- first_name: Wei
full_name: Zheng, Wei
last_name: Zheng
citation:
ama: 'Stoughton C, Lupton RH, Bernardi M, et al. Sloan digital sky survey: Early
data release. The Astronomical Journal. 2002;123(1):485-548. doi:10.1086/324741'
apa: 'Stoughton, C., Lupton, R. H., Bernardi, M., Blanton, M. R., Burles, S., Castander,
F. J., … Zheng, W. (2002). Sloan digital sky survey: Early data release. The
Astronomical Journal. American Astronomical Society. https://doi.org/10.1086/324741'
chicago: 'Stoughton, Chris, Robert H. Lupton, Mariangela Bernardi, Michael R. Blanton,
Scott Burles, Francisco J. Castander, A. J. Connolly, et al. “Sloan Digital Sky
Survey: Early Data Release.” The Astronomical Journal. American Astronomical
Society, 2002. https://doi.org/10.1086/324741.'
ieee: 'C. Stoughton et al., “Sloan digital sky survey: Early data release,”
The Astronomical Journal, vol. 123, no. 1. American Astronomical Society,
pp. 485–548, 2002.'
ista: 'Stoughton C et al. 2002. Sloan digital sky survey: Early data release. The
Astronomical Journal. 123(1), 485–548.'
mla: 'Stoughton, Chris, et al. “Sloan Digital Sky Survey: Early Data Release.” The
Astronomical Journal, vol. 123, no. 1, American Astronomical Society, 2002,
pp. 485–548, doi:10.1086/324741.'
short: C. Stoughton, R.H. Lupton, M. Bernardi, M.R. Blanton, S. Burles, F.J. Castander,
A.J. Connolly, D.J. Eisenstein, J.A. Frieman, G.S. Hennessy, R.B. Hindsley, Ž.
Ivezić, S. Kent, P.Z. Kunszt, B.C. Lee, A. Meiksin, J.A. Munn, H.J. Newberg, R.C.
Nichol, T. Nicinski, J.R. Pier, G.T. Richards, M.W. Richmond, D.J. Schlegel, J.A.
Smith, M.A. Strauss, M. SubbaRao, A.S. Szalay, A.R. Thakar, D.L. Tucker, D.E.
Vanden Berk, B. Yanny, J.K. Adelman, J.E. Anderson, Jr., S.F. Anderson, J. Annis,
N.A. Bahcall, J.A. Bakken, M. Bartelmann, S. Bastian, A. Bauer, E. Berman, H.
Böhringer, W.N. Boroski, S. Bracker, C. Briegel, J.W. Briggs, J. Brinkmann, R.
Brunner, L. Carey, M.A. Carr, B. Chen, D. Christian, P.L. Colestock, J.H. Crocker,
I. Csabai, P.C. Czarapata, J. Dalcanton, A.F. Davidsen, J.E. Davis, W. Dehnen,
S. Dodelson, M. Doi, T. Dombeck, M. Donahue, N. Ellman, B.R. Elms, M.L. Evans,
L. Eyer, X. Fan, G.R. Federwitz, S. Friedman, M. Fukugita, R. Gal, B. Gillespie,
K. Glazebrook, J. Gray, E.K. Grebel, B. Greenawalt, G. Greene, J.E. Gunn, E. de
Haas, Z. Haiman, M. Haldeman, P.B. Hall, M. Hamabe, B. Hansen, F.H. Harris, H.
Harris, M. Harvanek, S.L. Hawley, J.J.E. Hayes, T.M. Heckman, A. Helmi, A. Henden,
C.J. Hogan, D.W. Hogg, D.J. Holmgren, J. Holtzman, C.-H. Huang, C. Hull, S.-I.
Ichikawa, T. Ichikawa, D.E. Johnston, G. Kauffmann, R.S.J. Kim, T. Kimball, E.
Kinney, M. Klaene, S.J. Kleinman, A. Klypin, G.R. Knapp, J. Korienek, J. Krolik,
R.G. Kron, J. Krzesiński, D.Q. Lamb, R.F. Leger, S. Limmongkol, C. Lindenmeyer,
D.C. Long, C. Loomis, J. Loveday, B. MacKinnon, E.J. Mannery, P.M. Mantsch, B.
Margon, P. McGehee, T.A. McKay, B. McLean, K. Menou, A. Merelli, H.J. Mo, D.G.
Monet, O. Nakamura, V.K. Narayanan, T. Nash, E.H. Neilsen, Jr., P.R. Newman, A.
Nitta, M. Odenkirchen, N. Okada, S. Okamura, J.P. Ostriker, R. Owen, A.G. Pauls,
J. Peoples, R.S. Peterson, D. Petravick, A. Pope, R. Pordes, M. Postman, A. Prosapio,
T.R. Quinn, R. Rechenmacher, C.H. Rivetta, H.-W. Rix, C.M. Rockosi, R. Rosner,
K. Ruthmansdorfer, D. Sandford, D.P. Schneider, R. Scranton, M. Sekiguchi, G.
Sergey, R. Sheth, K. Shimasaku, S. Smee, S.A. Snedden, A. Stebbins, C. Stubbs,
I. Szapudi, P. Szkody, G.P. Szokoly, S. Tabachnik, Z. Tsvetanov, A. Uomoto, M.S.
Vogeley, W. Voges, P. Waddell, R. Walterbos, S. Wang, M. Watanabe, D.H. Weinberg,
R.L. White, S.D.M. White, B. Wilhite, D. Wolfe, N. Yasuda, D.G. York, I. Zehavi,
W. Zheng, The Astronomical Journal 123 (2002) 485–548.
date_created: 2024-09-06T10:32:06Z
date_published: 2002-01-01T00:00:00Z
date_updated: 2024-11-12T09:51:31Z
day: '01'
doi: 10.1086/324741
extern: '1'
intvolume: ' 123'
issue: '1'
language:
- iso: eng
month: '01'
oa_version: None
page: 485-548
publication: The Astronomical Journal
publication_identifier:
eissn:
- 1538-3881
issn:
- 0004-6256
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
related_material:
link:
- relation: erratum
url: https://doi.org/10.1086/340314
scopus_import: '1'
status: public
title: 'Sloan digital sky survey: Early data release'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 123
year: '2002'
...
---
OA_place: repository
OA_type: free access
_id: '17802'
abstract:
- lang: eng
text: The Sloan Digital Sky Survey has confirmed the existence of populations of
broad absorption line (BAL) quasars with various unusual properties. We present
and discuss 23 such objects and consider the implications of their wide range
of properties for models of BAL outflows and quasars in general. We have discovered
one BAL quasar with a record number of absorption lines. Two other similarly complex
objects with many narrow troughs show broad Mg II absorption extending longward
of their systemic host galaxy redshifts. This can be explained as absorption of
an extended continuum source by the rotation-dominated base of a disk wind. Five
other objects have absorption that removes an unprecedented ∼90% of all flux shortward
of Mg II. The absorption in one of them has varied across the ultraviolet with
an amplitude and rate of change as great as ever seen. This same object may also
show broad Hβ absorption. Numerous reddened BAL quasars have been found, including
at least one reddened mini-BAL quasar with very strong Fe II emission. The five
reddest objects have continuum reddenings of E(B-V) ≃ 0.5, and in two of them
we find strong evidence that the reddening curve is even steeper than that of
the SMC. We have found at least one object with absorption from Fe III but not
Fe II. This may be due to a high column density of moderately high ionization
gas, but the Fe III level populations must also be affected by some sort of resonance.
Finally, we have found two luminous, probably reddened high-redshift objects that
may be BAL quasars whose troughs partially cover different regions of the continuum
source as a function of velocity.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Patrick B.
full_name: Hall, Patrick B.
last_name: Hall
- first_name: Scott F.
full_name: Anderson, Scott F.
last_name: Anderson
- first_name: Michael A.
full_name: Strauss, Michael A.
last_name: Strauss
- first_name: Donald G.
full_name: York, Donald G.
last_name: York
- first_name: Gordon T.
full_name: Richards, Gordon T.
last_name: Richards
- first_name: Xiaohui
full_name: Fan, Xiaohui
last_name: Fan
- first_name: G. R.
full_name: Knapp, G. R.
last_name: Knapp
- first_name: Donald P.
full_name: Schneider, Donald P.
last_name: Schneider
- first_name: Daniel E.
full_name: Vanden Berk, Daniel E.
last_name: Vanden Berk
- first_name: T. R.
full_name: Geballe, T. R.
last_name: Geballe
- first_name: Amanda E.
full_name: Bauer, Amanda E.
last_name: Bauer
- first_name: Robert H.
full_name: Becker, Robert H.
last_name: Becker
- first_name: Marc
full_name: Davis, Marc
last_name: Davis
- first_name: Hans‐Walter
full_name: Rix, Hans‐Walter
last_name: Rix
- first_name: R. C.
full_name: Nichol, R. C.
last_name: Nichol
- first_name: Neta A.
full_name: Bahcall, Neta A.
last_name: Bahcall
- first_name: J.
full_name: Brinkmann, J.
last_name: Brinkmann
- first_name: Robert
full_name: Brunner, Robert
last_name: Brunner
- first_name: A. J.
full_name: Connolly, A. J.
last_name: Connolly
- first_name: Istvan
full_name: Csabai, Istvan
last_name: Csabai
- first_name: Mamoru
full_name: Doi, Mamoru
last_name: Doi
- first_name: Masataka
full_name: Fukugita, Masataka
last_name: Fukugita
- first_name: James E.
full_name: Gunn, James E.
last_name: Gunn
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Michael
full_name: Harvanek, Michael
last_name: Harvanek
- first_name: Timothy M.
full_name: Heckman, Timothy M.
last_name: Heckman
- first_name: G. S.
full_name: Hennessy, G. S.
last_name: Hennessy
- first_name: Naohisa
full_name: Inada, Naohisa
last_name: Inada
- first_name: Željko
full_name: Ivezić, Željko
last_name: Ivezić
- first_name: David
full_name: Johnston, David
last_name: Johnston
- first_name: S.
full_name: Kleinman, S.
last_name: Kleinman
- first_name: Julian H.
full_name: Krolik, Julian H.
last_name: Krolik
- first_name: Jurek
full_name: Krzesinski, Jurek
last_name: Krzesinski
- first_name: Peter Z.
full_name: Kunszt, Peter Z.
last_name: Kunszt
- first_name: D. Q.
full_name: Lamb, D. Q.
last_name: Lamb
- first_name: Daniel C.
full_name: Long, Daniel C.
last_name: Long
- first_name: Robert H.
full_name: Lupton, Robert H.
last_name: Lupton
- first_name: Gajus
full_name: Miknaitis, Gajus
last_name: Miknaitis
- first_name: Jeffrey A.
full_name: Munn, Jeffrey A.
last_name: Munn
- first_name: Vijay K.
full_name: Narayanan, Vijay K.
last_name: Narayanan
- first_name: Eric
full_name: Neilsen, Eric
last_name: Neilsen
- first_name: P. R.
full_name: Newman, P. R.
last_name: Newman
- first_name: Atsuko
full_name: Nitta, Atsuko
last_name: Nitta
- first_name: Sadanori
full_name: Okamura, Sadanori
last_name: Okamura
- first_name: Laura
full_name: Pentericci, Laura
last_name: Pentericci
- first_name: Jeffrey R.
full_name: Pier, Jeffrey R.
last_name: Pier
- first_name: David J.
full_name: Schlegel, David J.
last_name: Schlegel
- first_name: S.
full_name: Snedden, S.
last_name: Snedden
- first_name: Alexander S.
full_name: Szalay, Alexander S.
last_name: Szalay
- first_name: Anirudda R.
full_name: Thakar, Anirudda R.
last_name: Thakar
- first_name: Zlatan
full_name: Tsvetanov, Zlatan
last_name: Tsvetanov
- first_name: Richard L.
full_name: White, Richard L.
last_name: White
- first_name: Wei
full_name: Zheng, Wei
last_name: Zheng
citation:
ama: Hall PB, Anderson SF, Strauss MA, et al. Unusual broad absorption line quasars
from the sloan digital sky survey. The Astrophysical Journal Supplement Series.
2002;141(2):267-309. doi:10.1086/340546
apa: Hall, P. B., Anderson, S. F., Strauss, M. A., York, D. G., Richards, G. T.,
Fan, X., … Zheng, W. (2002). Unusual broad absorption line quasars from the sloan
digital sky survey. The Astrophysical Journal Supplement Series. American
Astronomical Society. https://doi.org/10.1086/340546
chicago: Hall, Patrick B., Scott F. Anderson, Michael A. Strauss, Donald G. York,
Gordon T. Richards, Xiaohui Fan, G. R. Knapp, et al. “Unusual Broad Absorption
Line Quasars from the Sloan Digital Sky Survey.” The Astrophysical Journal
Supplement Series. American Astronomical Society, 2002. https://doi.org/10.1086/340546.
ieee: P. B. Hall et al., “Unusual broad absorption line quasars from the
sloan digital sky survey,” The Astrophysical Journal Supplement Series,
vol. 141, no. 2. American Astronomical Society, pp. 267–309, 2002.
ista: Hall PB, Anderson SF, Strauss MA, York DG, Richards GT, Fan X, Knapp GR, Schneider
DP, Vanden Berk DE, Geballe TR, Bauer AE, Becker RH, Davis M, Rix H, Nichol RC,
Bahcall NA, Brinkmann J, Brunner R, Connolly AJ, Csabai I, Doi M, Fukugita M,
Gunn JE, Haiman Z, Harvanek M, Heckman TM, Hennessy GS, Inada N, Ivezić Ž, Johnston
D, Kleinman S, Krolik JH, Krzesinski J, Kunszt PZ, Lamb DQ, Long DC, Lupton RH,
Miknaitis G, Munn JA, Narayanan VK, Neilsen E, Newman PR, Nitta A, Okamura S,
Pentericci L, Pier JR, Schlegel DJ, Snedden S, Szalay AS, Thakar AR, Tsvetanov
Z, White RL, Zheng W. 2002. Unusual broad absorption line quasars from the sloan
digital sky survey. The Astrophysical Journal Supplement Series. 141(2), 267–309.
mla: Hall, Patrick B., et al. “Unusual Broad Absorption Line Quasars from the Sloan
Digital Sky Survey.” The Astrophysical Journal Supplement Series, vol.
141, no. 2, American Astronomical Society, 2002, pp. 267–309, doi:10.1086/340546.
short: P.B. Hall, S.F. Anderson, M.A. Strauss, D.G. York, G.T. Richards, X. Fan,
G.R. Knapp, D.P. Schneider, D.E. Vanden Berk, T.R. Geballe, A.E. Bauer, R.H. Becker,
M. Davis, H. Rix, R.C. Nichol, N.A. Bahcall, J. Brinkmann, R. Brunner, A.J. Connolly,
I. Csabai, M. Doi, M. Fukugita, J.E. Gunn, Z. Haiman, M. Harvanek, T.M. Heckman,
G.S. Hennessy, N. Inada, Ž. Ivezić, D. Johnston, S. Kleinman, J.H. Krolik, J.
Krzesinski, P.Z. Kunszt, D.Q. Lamb, D.C. Long, R.H. Lupton, G. Miknaitis, J.A.
Munn, V.K. Narayanan, E. Neilsen, P.R. Newman, A. Nitta, S. Okamura, L. Pentericci,
J.R. Pier, D.J. Schlegel, S. Snedden, A.S. Szalay, A.R. Thakar, Z. Tsvetanov,
R.L. White, W. Zheng, The Astrophysical Journal Supplement Series 141 (2002) 267–309.
date_created: 2024-09-06T11:30:40Z
date_published: 2002-08-01T00:00:00Z
date_updated: 2024-11-12T10:02:25Z
day: '01'
doi: 10.1086/340546
extern: '1'
external_id:
arxiv:
- astro-ph/0203252
intvolume: ' 141'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0203252
month: '08'
oa: 1
oa_version: Preprint
page: 267-309
publication: The Astrophysical Journal Supplement Series
publication_identifier:
eissn:
- 1538-4365
issn:
- 0067-0049
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Unusual broad absorption line quasars from the sloan digital sky survey
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 141
year: '2002'
...
---
OA_place: repository
OA_type: free access
_id: '17803'
abstract:
- lang: eng
text: We reassess constraints on the cosmological baryon density from observations
of the mean decrement and power spectrum of the Lyα forest, taking into account
uncertainties in all free parameters in the simplest gravitational instability
model. The uncertainty is dominated by that of the photoionizing background, but
incomplete knowledge of the thermal state of the intergalactic medium also contributes
significantly to the error budget. While current estimates of the baryon fraction
from the forest do prefer values that are somewhat higher than the big bang nucleosynthesis
value of Ωb h2 = 0.02 ± 0.001, the discrepancy is at most about 3 σ. For instance,
assuming the highest estimate of the ionizing background, as indicated by recent
measurements of a large escape fraction from Lyman break galaxies by Steidel,
Pettini, & Adelberger, we find Ωbh2 = 0.045 ± 0.008. A recent measurement of the
ionizing background from the proximity effect by Scott et al., on the other hand,
implies Ωbh2 = 0.03 ± 0.01. We provide an expression from which future likelihoods
for Ωb h2 can be derived as measurements of the ionizing background improve—consistency
among constraints from the forest, nucleosynthesis, and the microwave background
will provide a powerful test of the gravitational instability model for the forest
and for large-scale structure in general. We also develop a formalism that treats
lower bounds on the baryon density in a statistical manner, which is appropriate
if only a lower bound on the ionizing background is known. Finally, we discuss
the implications of the escape fraction measurement for the age, structure, and
stellar content of Lyman break galaxies. We show that the observed hard spectrum
from Lyman break galaxies requires a very young age (less than about 1 million
years) and/or a top-heavy initial mass function. We also build a model in which
an extended (non-disk-like) gas distribution allows a large escape fraction.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Lam
full_name: Hui, Lam
last_name: Hui
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Matias
full_name: Zaldarriaga, Matias
last_name: Zaldarriaga
- first_name: Tal
full_name: Alexander, Tal
last_name: Alexander
citation:
ama: Hui L, Haiman Z, Zaldarriaga M, Alexander T. Connections between the cosmic
baryon fraction, the extragalactic ionizing background, and Lyman break galaxies.
The Astrophysical Journal. 2002;564(2):525-533. doi:10.1086/324401
apa: Hui, L., Haiman, Z., Zaldarriaga, M., & Alexander, T. (2002). Connections
between the cosmic baryon fraction, the extragalactic ionizing background, and
Lyman break galaxies. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/324401
chicago: Hui, Lam, Zoltán Haiman, Matias Zaldarriaga, and Tal Alexander. “Connections
between the Cosmic Baryon Fraction, the Extragalactic Ionizing Background, and
Lyman Break Galaxies.” The Astrophysical Journal. American Astronomical
Society, 2002. https://doi.org/10.1086/324401.
ieee: L. Hui, Z. Haiman, M. Zaldarriaga, and T. Alexander, “Connections between
the cosmic baryon fraction, the extragalactic ionizing background, and Lyman break
galaxies,” The Astrophysical Journal, vol. 564, no. 2. American Astronomical
Society, pp. 525–533, 2002.
ista: Hui L, Haiman Z, Zaldarriaga M, Alexander T. 2002. Connections between the
cosmic baryon fraction, the extragalactic ionizing background, and Lyman break
galaxies. The Astrophysical Journal. 564(2), 525–533.
mla: Hui, Lam, et al. “Connections between the Cosmic Baryon Fraction, the Extragalactic
Ionizing Background, and Lyman Break Galaxies.” The Astrophysical Journal,
vol. 564, no. 2, American Astronomical Society, 2002, pp. 525–33, doi:10.1086/324401.
short: L. Hui, Z. Haiman, M. Zaldarriaga, T. Alexander, The Astrophysical Journal
564 (2002) 525–533.
date_created: 2024-09-06T11:31:53Z
date_published: 2002-01-10T00:00:00Z
date_updated: 2024-11-12T10:08:42Z
day: '10'
doi: 10.1086/324401
extern: '1'
external_id:
arxiv:
- astro-ph/0104442
intvolume: ' 564'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0104442
month: '01'
oa: 1
oa_version: Preprint
page: 525-533
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Connections between the cosmic baryon fraction, the extragalactic ionizing
background, and Lyman break galaxies
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 564
year: '2002'
...
---
OA_type: closed access
_id: '18369'
article_processing_charge: No
article_type: letter_note
author:
- first_name: Michael M.
full_name: Bronstein, Michael M.
last_name: Bronstein
- first_name: Alexander
full_name: Bronstein, Alexander
id: 58f3726e-7cba-11ef-ad8b-e6e8cb3904e6
last_name: Bronstein
orcid: 0000-0001-9699-8730
citation:
ama: Bronstein MM, Bronstein AM. Biometrics was no match for hair-raising tricks.
Nature. 2002;420(6917):739-739. doi:10.1038/420739a
apa: Bronstein, M. M., & Bronstein, A. M. (2002). Biometrics was no match for
hair-raising tricks. Nature. Springer Nature. https://doi.org/10.1038/420739a
chicago: Bronstein, Michael M., and Alex M. Bronstein. “Biometrics Was No Match
for Hair-Raising Tricks.” Nature. Springer Nature, 2002. https://doi.org/10.1038/420739a.
ieee: M. M. Bronstein and A. M. Bronstein, “Biometrics was no match for hair-raising
tricks,” Nature, vol. 420, no. 6917. Springer Nature, pp. 739–739, 2002.
ista: Bronstein MM, Bronstein AM. 2002. Biometrics was no match for hair-raising
tricks. Nature. 420(6917), 739–739.
mla: Bronstein, Michael M., and Alex M. Bronstein. “Biometrics Was No Match for
Hair-Raising Tricks.” Nature, vol. 420, no. 6917, Springer Nature, 2002,
pp. 739–739, doi:10.1038/420739a.
short: M.M. Bronstein, A.M. Bronstein, Nature 420 (2002) 739–739.
date_created: 2024-10-15T11:20:54Z
date_published: 2002-12-19T00:00:00Z
date_updated: 2024-10-21T09:06:34Z
day: '19'
doi: 10.1038/420739a
extern: '1'
external_id:
pmid:
- '12490915'
intvolume: ' 420'
issue: '6917'
language:
- iso: eng
month: '12'
oa_version: None
page: 739-739
pmid: 1
publication: Nature
publication_identifier:
issn:
- 0028-0836
- 1476-4687
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Biometrics was no match for hair-raising tricks
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 420
year: '2002'
...
---
_id: '18382'
abstract:
- lang: eng
text: Detection of high-energy photons emitted as the result of positron decay is
one of the most important low-level stages in PET imaging. In this paper we consider
a detector based on the Anger scintillation camera. Incident high-energy gamma
quanta, generated due to positron decay, produce scintillation effect in the crystal.
As a result, a shower of low energy photons in the visible and UV spectra is emitted.
These photons are collected by an array of photo-multipliers (PMTs), optically
coupled to the scintillation crystal, and invoke electric impulses in them. The
PMT responses are utilized in estimation of the scintillation point coordinates.
Our work incorporates side information on the photon incidence angle into the
process of position estimation. We use localized, asymptotically optimal, nonlinear
estimators, implemented by feedforward and radial basis function (RBF) neural
networks. As a byproduct, we get accurate position estimation over the entire
area of the detector including the edges. This is difficult to obtain with centroid
arithmetic algorithms. We present a comparison of algorithms on a Monte Carlo
simulation and discuss the prospects for practical implementation.
article_processing_charge: No
author:
- first_name: Alexander
full_name: Bronstein, Alexander
id: 58f3726e-7cba-11ef-ad8b-e6e8cb3904e6
last_name: Bronstein
orcid: 0000-0001-9699-8730
- first_name: M.M.
full_name: Bronstein, M.M.
last_name: Bronstein
- first_name: M.
full_name: Zibulevsky, M.
last_name: Zibulevsky
- first_name: Y.Y.
full_name: Zeevi, Y.Y.
last_name: Zeevi
citation:
ama: 'Bronstein AM, Bronstein MM, Zibulevsky M, Zeevi YY. Optimal non-linear line-of-flight
estimation in positron emission tomography. In: The 22nd Convention on Electrical
and Electronics Engineers in Israel. Vol 2002-January. IEEE; 2002:341-344.
doi:10.1109/eeei.2002.1178493'
apa: 'Bronstein, A. M., Bronstein, M. M., Zibulevsky, M., & Zeevi, Y. Y. (2002).
Optimal non-linear line-of-flight estimation in positron emission tomography.
In The 22nd Convention on Electrical and Electronics Engineers in Israel
(Vol. 2002–January, pp. 341–344). Tel-Aviv, Israel: IEEE. https://doi.org/10.1109/eeei.2002.1178493'
chicago: Bronstein, Alex M., M.M. Bronstein, M. Zibulevsky, and Y.Y. Zeevi. “Optimal
Non-Linear Line-of-Flight Estimation in Positron Emission Tomography.” In The
22nd Convention on Electrical and Electronics Engineers in Israel, 2002–January:341–44.
IEEE, 2002. https://doi.org/10.1109/eeei.2002.1178493.
ieee: A. M. Bronstein, M. M. Bronstein, M. Zibulevsky, and Y. Y. Zeevi, “Optimal
non-linear line-of-flight estimation in positron emission tomography,” in The
22nd Convention on Electrical and Electronics Engineers in Israel, Tel-Aviv,
Israel, 2002, vol. 2002–January, pp. 341–344.
ista: Bronstein AM, Bronstein MM, Zibulevsky M, Zeevi YY. 2002. Optimal non-linear
line-of-flight estimation in positron emission tomography. The 22nd Convention
on Electrical and Electronics Engineers in Israel. Convention on Electrical and
Electronics Engineers vol. 2002–January, 341–344.
mla: Bronstein, Alex M., et al. “Optimal Non-Linear Line-of-Flight Estimation in
Positron Emission Tomography.” The 22nd Convention on Electrical and Electronics
Engineers in Israel, vol. 2002–January, IEEE, 2002, pp. 341–44, doi:10.1109/eeei.2002.1178493.
short: A.M. Bronstein, M.M. Bronstein, M. Zibulevsky, Y.Y. Zeevi, in:, The 22nd
Convention on Electrical and Electronics Engineers in Israel, IEEE, 2002, pp.
341–344.
conference:
end_date: 2002-12-01
location: Tel-Aviv, Israel
name: Convention on Electrical and Electronics Engineers
start_date: 2002-12-01
date_created: 2024-10-15T11:20:54Z
date_published: 2002-12-01T00:00:00Z
date_updated: 2024-11-12T08:08:44Z
day: '01'
doi: 10.1109/eeei.2002.1178493
extern: '1'
language:
- iso: eng
month: '12'
oa_version: None
page: 341-344
publication: The 22nd Convention on Electrical and Electronics Engineers in Israel
publication_identifier:
isbn:
- '0780376935'
publication_status: published
publisher: IEEE
quality_controlled: '1'
scopus_import: '1'
status: public
title: Optimal non-linear line-of-flight estimation in positron emission tomography
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2002-January
year: '2002'
...
---
_id: '18383'
article_processing_charge: No
author:
- first_name: M.M.
full_name: Bronstein, M.M.
last_name: Bronstein
- first_name: Alexander
full_name: Bronstein, Alexander
id: 58f3726e-7cba-11ef-ad8b-e6e8cb3904e6
last_name: Bronstein
orcid: 0000-0001-9699-8730
- first_name: M.
full_name: Zibulevsky, M.
last_name: Zibulevsky
- first_name: H.
full_name: Azhari, H.
last_name: Azhari
citation:
ama: 'Bronstein MM, Bronstein AM, Zibulevsky M, Azhari H. Application of the NUFFT
for reconstruction problems in diffraction tomography. In: The 22nd Convention
on Electrical and Electronics Engineers in Israel. Vol 2002-January. IEEE;
2002:345-347. doi:10.1109/eeei.2002.1178495'
apa: 'Bronstein, M. M., Bronstein, A. M., Zibulevsky, M., & Azhari, H. (2002).
Application of the NUFFT for reconstruction problems in diffraction tomography.
In The 22nd Convention on Electrical and Electronics Engineers in Israel
(Vol. 2002–January, pp. 345–347). Tel-Aviv, Israel: IEEE. https://doi.org/10.1109/eeei.2002.1178495'
chicago: Bronstein, M.M., Alex M. Bronstein, M. Zibulevsky, and H. Azhari. “Application
of the NUFFT for Reconstruction Problems in Diffraction Tomography.” In The
22nd Convention on Electrical and Electronics Engineers in Israel, 2002–January:345–47.
IEEE, 2002. https://doi.org/10.1109/eeei.2002.1178495.
ieee: M. M. Bronstein, A. M. Bronstein, M. Zibulevsky, and H. Azhari, “Application
of the NUFFT for reconstruction problems in diffraction tomography,” in The
22nd Convention on Electrical and Electronics Engineers in Israel, Tel-Aviv,
Israel, 2002, vol. 2002–January, pp. 345–347.
ista: Bronstein MM, Bronstein AM, Zibulevsky M, Azhari H. 2002. Application of the
NUFFT for reconstruction problems in diffraction tomography. The 22nd Convention
on Electrical and Electronics Engineers in Israel. Convention on Electrical and
Electronics Engineers vol. 2002–January, 345–347.
mla: Bronstein, M. M., et al. “Application of the NUFFT for Reconstruction Problems
in Diffraction Tomography.” The 22nd Convention on Electrical and Electronics
Engineers in Israel, vol. 2002–January, IEEE, 2002, pp. 345–47, doi:10.1109/eeei.2002.1178495.
short: M.M. Bronstein, A.M. Bronstein, M. Zibulevsky, H. Azhari, in:, The 22nd Convention
on Electrical and Electronics Engineers in Israel, IEEE, 2002, pp. 345–347.
conference:
end_date: 2002-12-01
location: Tel-Aviv, Israel
name: Convention on Electrical and Electronics Engineers
start_date: 2002-12-01
date_created: 2024-10-15T11:20:54Z
date_published: 2002-12-01T00:00:00Z
date_updated: 2024-11-12T07:51:57Z
day: '01'
doi: 10.1109/eeei.2002.1178495
extern: '1'
language:
- iso: eng
month: '12'
oa_version: None
page: 345-347
publication: The 22nd Convention on Electrical and Electronics Engineers in Israel
publication_identifier:
isbn:
- '0780376935'
publication_status: published
publisher: IEEE
quality_controlled: '1'
scopus_import: '1'
status: public
title: Application of the NUFFT for reconstruction problems in diffraction tomography
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2002-January
year: '2002'
...
---
_id: '18404'
abstract:
- lang: eng
text: We consider detection of high-energy photons in PET using thick scintillation
crystals. Parallax effect and multiple Compton interactions in this type of crystals
significantly reduce the accuracy of conventional detection methods. In order
to estimate the scintillation point coordinates based on photomultiplier responses,
we use asymptotically optimal nonlinear techniques, implemented by feed-forward
neural networks, radial basis functions (RBF) networks, and neuro-fuzzy systems.
Incorporation of information about angles of incidence of photons, significantly
improves accuracy of estimation. The proposed estimators are fast enough to perform
detection, using conventional computers.
article_processing_charge: No
author:
- first_name: Alexander
full_name: Bronstein, Alexander
id: 58f3726e-7cba-11ef-ad8b-e6e8cb3904e6
last_name: Bronstein
orcid: 0000-0001-9699-8730
- first_name: M.
full_name: Bronstein, M.
last_name: Bronstein
- first_name: M.
full_name: Zibulevsky, M.
last_name: Zibulevsky
- first_name: Y.Y.
full_name: Zeevi, Y.Y.
last_name: Zeevi
citation:
ama: 'Bronstein AM, Bronstein M, Zibulevsky M, Zeevi YY. Optimal nonlinear estimation
of photon coordinates in PET. In: Proceedings IEEE International Symposium
on Biomedical Imaging. Vol 2002-January. IEEE; 2002:541-544. doi:10.1109/isbi.2002.1029314'
apa: 'Bronstein, A. M., Bronstein, M., Zibulevsky, M., & Zeevi, Y. Y. (2002).
Optimal nonlinear estimation of photon coordinates in PET. In Proceedings IEEE
International Symposium on Biomedical Imaging (Vol. 2002–January, pp. 541–544).
Washington, DC, United States: IEEE. https://doi.org/10.1109/isbi.2002.1029314'
chicago: Bronstein, Alex M., M. Bronstein, M. Zibulevsky, and Y.Y. Zeevi. “Optimal
Nonlinear Estimation of Photon Coordinates in PET.” In Proceedings IEEE International
Symposium on Biomedical Imaging, 2002–January:541–44. IEEE, 2002. https://doi.org/10.1109/isbi.2002.1029314.
ieee: A. M. Bronstein, M. Bronstein, M. Zibulevsky, and Y. Y. Zeevi, “Optimal nonlinear
estimation of photon coordinates in PET,” in Proceedings IEEE International
Symposium on Biomedical Imaging, Washington, DC, United States, 2002, vol.
2002–January, pp. 541–544.
ista: 'Bronstein AM, Bronstein M, Zibulevsky M, Zeevi YY. 2002. Optimal nonlinear
estimation of photon coordinates in PET. Proceedings IEEE International Symposium
on Biomedical Imaging. ISBI: International Symposium on Biomedical Imaging vol.
2002–January, 541–544.'
mla: Bronstein, Alex M., et al. “Optimal Nonlinear Estimation of Photon Coordinates
in PET.” Proceedings IEEE International Symposium on Biomedical Imaging,
vol. 2002–January, IEEE, 2002, pp. 541–44, doi:10.1109/isbi.2002.1029314.
short: A.M. Bronstein, M. Bronstein, M. Zibulevsky, Y.Y. Zeevi, in:, Proceedings
IEEE International Symposium on Biomedical Imaging, IEEE, 2002, pp. 541–544.
conference:
end_date: 2002-07-10
location: Washington, DC, United States
name: 'ISBI: International Symposium on Biomedical Imaging'
start_date: 2002-07-07
date_created: 2024-10-15T11:20:54Z
date_published: 2002-08-01T00:00:00Z
date_updated: 2024-11-12T07:48:20Z
day: '01'
doi: 10.1109/isbi.2002.1029314
extern: '1'
language:
- iso: eng
month: '08'
oa_version: None
page: 541-544
publication: Proceedings IEEE International Symposium on Biomedical Imaging
publication_identifier:
isbn:
- 078037584X
publication_status: published
publisher: IEEE
quality_controlled: '1'
scopus_import: '1'
status: public
title: Optimal nonlinear estimation of photon coordinates in PET
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2002-January
year: '2002'
...