---
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_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_place: repository
OA_type: green
_id: '17816'
abstract:
- lang: eng
text: The lifetime of the luminous phase of quasars is constrained by current observations
to be 10^6 ≲ tQ ≲ 10^8 yr but is otherwise unknown. We model the quasar luminosity
function in detail in the optical and X-ray bands using the Press-Schechter formalism
and show that the expected clustering of quasars depends strongly on their assumed
lifetime tQ. We quantify this dependence and find that existing measurements of
the correlation length of quasars are consistent with the range 10^6 ≲ tQ ≲ 10^8
yr. We then show that future measurements of the power spectrum of quasars out
to z ~ 3, from the Anglo-Australian Telescope Two-Degree Field or Sloan Digital
Sky Survey, can significantly improve this constraint and in principle allow a
precise determination of tQ. We estimate the systematic errors introduced by uncertainties
in the modeling of the quasar-halo relationship, as well as by the possible existence
of obscured quasars.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Lam
full_name: Hui, Lam
last_name: Hui
citation:
ama: Haiman Z, Hui L. Constraining the lifetime of quasars from their spatial clustering.
The Astrophysical Journal. 2001;547(1):27-38. doi:10.1086/318330
apa: Haiman, Z., & Hui, L. (2001). Constraining the lifetime of quasars from
their spatial clustering. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/318330
chicago: Haiman, Zoltán, and Lam Hui. “Constraining the Lifetime of Quasars from
Their Spatial Clustering.” The Astrophysical Journal. American Astronomical
Society, 2001. https://doi.org/10.1086/318330.
ieee: Z. Haiman and L. Hui, “Constraining the lifetime of quasars from their spatial
clustering,” The Astrophysical Journal, vol. 547, no. 1. American Astronomical
Society, pp. 27–38, 2001.
ista: Haiman Z, Hui L. 2001. Constraining the lifetime of quasars from their spatial
clustering. The Astrophysical Journal. 547(1), 27–38.
mla: Haiman, Zoltán, and Lam Hui. “Constraining the Lifetime of Quasars from Their
Spatial Clustering.” The Astrophysical Journal, vol. 547, no. 1, American
Astronomical Society, 2001, pp. 27–38, doi:10.1086/318330.
short: Z. Haiman, L. Hui, The Astrophysical Journal 547 (2001) 27–38.
date_created: 2024-09-06T11:44:44Z
date_published: 2001-01-20T00:00:00Z
date_updated: 2024-11-12T12:22:49Z
day: '20'
doi: 10.1086/318330
extern: '1'
external_id:
arxiv:
- astro-ph/0002190
intvolume: ' 547'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0002190
month: '01'
oa: 1
oa_version: Preprint
page: 27-38
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 lifetime of quasars from their spatial clustering
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 547
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17824'
abstract:
- lang: eng
text: The ubiquity of supermassive black holes (SMBHs) at the centers of nearby
luminous galaxies can arise from the multiple mergers experienced by dark matter
halos in hierarchical structure formation models, even if only a small fraction
of these galaxies harbor SMBHs at high redshifts. We illustrate this possibility
using cosmological Monte Carlo simulations of the merger history of dark matter
halos and their associated SMBHs. In our most extreme models, in order to populate
nearly every bright galaxy with an SMBH at z = 0, only a few percent of the halos
with virial temperatures above 104 K are required to harbor an SMBH at high redshift.
This possibility must be included in studies of the luminosity function and the
clustering properties of quasars. We predict the number of SMBH merger events
that are detectable by the gravitational wave experiment Laser Interferometer
Space Antenna (LISA), as a function of redshift, out to z = 5. Although the event
rates can be significantly reduced in scenarios with rare SMBHs, a minimum of
~10 detectable merger events per year is predicted if SMBH binaries coalesce efficiently.
The observed distribution of events with redshift could yield valuable information
on the SMBH formation process. If SMBH binaries do not coalesce, we find that
at least several SMBH slingshot ejections probably occurred from z = 5 to the
present in each galaxy more massive than ~1011 M☉ at z = 0. Although our results
are sensitive to the minimum cooling mass assumed for the formation of SMBHs,
we expect the qualitative predictions of our models to be robust.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Kristen
full_name: Menou, Kristen
last_name: Menou
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Vijay K.
full_name: Narayanan, Vijay K.
last_name: Narayanan
citation:
ama: Menou K, Haiman Z, Narayanan VK. The merger history of supermassive black holes
in galaxies. The Astrophysical Journal. 2001;558(2):535-542. doi:10.1086/322310
apa: Menou, K., Haiman, Z., & Narayanan, V. K. (2001). The merger history of
supermassive black holes in galaxies. The Astrophysical Journal. American
Astronomical Society. https://doi.org/10.1086/322310
chicago: Menou, Kristen, Zoltán Haiman, and Vijay K. Narayanan. “The Merger History
of Supermassive Black Holes in Galaxies.” The Astrophysical Journal. American
Astronomical Society, 2001. https://doi.org/10.1086/322310.
ieee: K. Menou, Z. Haiman, and V. K. Narayanan, “The merger history of supermassive
black holes in galaxies,” The Astrophysical Journal, vol. 558, no. 2. American
Astronomical Society, pp. 535–542, 2001.
ista: Menou K, Haiman Z, Narayanan VK. 2001. The merger history of supermassive
black holes in galaxies. The Astrophysical Journal. 558(2), 535–542.
mla: Menou, Kristen, et al. “The Merger History of Supermassive Black Holes in Galaxies.”
The Astrophysical Journal, vol. 558, no. 2, American Astronomical Society,
2001, pp. 535–42, doi:10.1086/322310.
short: K. Menou, Z. Haiman, V.K. Narayanan, The Astrophysical Journal 558 (2001)
535–542.
date_created: 2024-09-06T11:57:11Z
date_published: 2001-09-10T00:00:00Z
date_updated: 2024-11-12T12:47:14Z
day: '10'
doi: 10.1086/322310
extern: '1'
external_id:
arxiv:
- astro-ph/0101196
intvolume: ' 558'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0101196
month: '09'
oa: 1
oa_version: Preprint
page: 535-542
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: The merger history of supermassive black holes in galaxies
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 558
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17826'
abstract:
- lang: eng
text: The hardness of the ionizing continuum from the first sources of UV radiation
plays a crucial role in the reionization of the intergalactic medium (IGM). While
usual stellar populations have soft spectra, miniquasars or metal-free stars with
high effective temperatures may emit hard photons, capable of doubly ionizing
helium and increasing the IGM temperature. Absorption within the source and in
the intervening IGM will render the ionizing continuum of high-redshift sources
inaccessible to direct observation. Here we show that He recombination lines from
the first luminous objects are potentially detectable by the Next Generation Space
Telescope. Together with measurements of the Hα emission line, this detection
can be used to infer the ratio of He II to H I ionizing photons, [mathematical
formula]. A measurement of this ratio would shed light on the nature and emission
mechanism of the first luminous sources, with important astrophysical consequences
for the reheating and reionization of the IGM.
article_processing_charge: No
article_type: original
arxiv: 1
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
orcid: 0000-0003-3633-5403
- first_name: Martin J.
full_name: Rees, Martin J.
last_name: Rees
citation:
ama: Oh SP, Haiman Z, Rees MJ. He II recombination lines from the first luminous
objects. The Astrophysical Journal. 2001;553(1):73-77. doi:10.1086/320650
apa: Oh, S. P., Haiman, Z., & Rees, M. J. (2001). He II recombination lines
from the first luminous objects. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/320650
chicago: Oh, S. Peng, Zoltán Haiman, and Martin J. Rees. “He II Recombination Lines
from the First Luminous Objects.” The Astrophysical Journal. American Astronomical
Society, 2001. https://doi.org/10.1086/320650.
ieee: S. P. Oh, Z. Haiman, and M. J. Rees, “He II recombination lines from the first
luminous objects,” The Astrophysical Journal, vol. 553, no. 1. American
Astronomical Society, pp. 73–77, 2001.
ista: Oh SP, Haiman Z, Rees MJ. 2001. He II recombination lines from the first luminous
objects. The Astrophysical Journal. 553(1), 73–77.
mla: Oh, S. Peng, et al. “He II Recombination Lines from the First Luminous Objects.”
The Astrophysical Journal, vol. 553, no. 1, American Astronomical Society,
2001, pp. 73–77, doi:10.1086/320650.
short: S.P. Oh, Z. Haiman, M.J. Rees, The Astrophysical Journal 553 (2001) 73–77.
date_created: 2024-09-06T11:58:39Z
date_published: 2001-05-20T00:00:00Z
date_updated: 2024-11-12T12:54:57Z
day: '20'
doi: 10.1086/320650
extern: '1'
external_id:
arxiv:
- astro-ph/0007351
intvolume: ' 553'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0007351
month: '05'
oa: 1
oa_version: Preprint
page: 73-77
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: He II recombination lines from the first luminous objects
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 553
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17829'
abstract:
- lang: eng
text: The early stage in the formation of a galaxy inevitably involves a spatially
extended distribution of infalling, cold gas. If a central luminous quasar turned
on during this phase, it would result in significant extended Lyα emission, possibly
accompanied by other lines. For halos condensing at redshifts 3 ≲ z ≲ 8 and having
virial temperatures 2 × 105 K ≲ Tvir ≲ 2 × 106 K, this emission results in a "fuzz"
of characteristic angular diameter of a few arcseconds and surface brightness
~10-18 to 10-16 ergs s-1 cm-2 arcsec-2. The fuzz around bright, high-redshift
quasars could be detected in deep narrowband imaging with current telescopes,
providing a direct constraint on galaxy formation models. The absence of detectable
fuzz might suggest that most of the protogalaxy's gas settles to a self-gravitating
disk before a quasar turns on. However, continued gas infall from large radii,
or an on-going merger spreading cold gas over a large solid angle, during the
luminous quasar phase could also result in extended Lyα emission, and can be constrained
by deep narrowband imaging.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Martin J.
full_name: Rees, Martin J.
last_name: Rees
citation:
ama: 'Haiman Z, Rees MJ. Extended Lyα emission around young quasars: A constraint
on galaxy formation. The Astrophysical Journal. 2001;556(1):87-92. doi:10.1086/321567'
apa: 'Haiman, Z., & Rees, M. J. (2001). Extended Lyα emission around young quasars:
A constraint on galaxy formation. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/321567'
chicago: 'Haiman, Zoltán, and Martin J. Rees. “Extended Lyα Emission around Young
Quasars: A Constraint on Galaxy Formation.” The Astrophysical Journal.
American Astronomical Society, 2001. https://doi.org/10.1086/321567.'
ieee: 'Z. Haiman and M. J. Rees, “Extended Lyα emission around young quasars: A
constraint on galaxy formation,” The Astrophysical Journal, vol. 556, no.
1. American Astronomical Society, pp. 87–92, 2001.'
ista: 'Haiman Z, Rees MJ. 2001. Extended Lyα emission around young quasars: A constraint
on galaxy formation. The Astrophysical Journal. 556(1), 87–92.'
mla: 'Haiman, Zoltán, and Martin J. Rees. “Extended Lyα Emission around Young Quasars:
A Constraint on Galaxy Formation.” The Astrophysical Journal, vol. 556,
no. 1, American Astronomical Society, 2001, pp. 87–92, doi:10.1086/321567.'
short: Z. Haiman, M.J. Rees, The Astrophysical Journal 556 (2001) 87–92.
date_created: 2024-09-06T12:09:20Z
date_published: 2001-07-01T00:00:00Z
date_updated: 2024-11-13T07:17:10Z
day: '01'
doi: 10.1086/321567
extern: '1'
external_id:
arxiv:
- astro-ph/0101174
intvolume: ' 556'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0101174
month: '07'
oa: 1
oa_version: Preprint
page: 87-92
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: 'Extended Lyα emission around young quasars: A constraint on galaxy formation'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 556
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17831'
abstract:
- lang: eng
text: The recent discoveries of luminous quasars at high redshifts imply that black
holes more massive than a few billion solar masses were already assembled when
the universe was less than a billion years old. We show that the existence of
these black holes is not surprising in popular hierarchical models of structure
formation. For example, the black hole needed to power the quasar SDSS 1044-0125
at z = 5.8 could arise naturally from the growth of stellar-mass seeds forming
at z > 10, when typical values are assumed for the radiative accretion efficiency
(~0.1) and the bolometric accretion luminosity in Eddington units (~1). Nevertheless,
SDSS 1044-0125 yields a nontrivial constraint on a combination of these parameters.
Extrapolating our model to future surveys, we derive the highest plausible redshift
for quasars that are not lensed or beamed, as a function of their apparent magnitude.
We find that at a limiting magnitude of K ~ 20, quasar surveys can yield strong
constraints on the growth of supermassive black holes out to z ~ 10.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Abraham
full_name: Loeb, Abraham
last_name: Loeb
citation:
ama: Haiman Z, Loeb A. What is the highest plausible redshift of luminous quasars?
The Astrophysical Journal. 2001;552(2):459-463. doi:10.1086/320586
apa: Haiman, Z., & Loeb, A. (2001). What is the highest plausible redshift of
luminous quasars? The Astrophysical Journal. American Astronomical Society.
https://doi.org/10.1086/320586
chicago: Haiman, Zoltán, and Abraham Loeb. “What Is the Highest Plausible Redshift
of Luminous Quasars?” The Astrophysical Journal. American Astronomical
Society, 2001. https://doi.org/10.1086/320586.
ieee: Z. Haiman and A. Loeb, “What is the highest plausible redshift of luminous
quasars?,” The Astrophysical Journal, vol. 552, no. 2. American Astronomical
Society, pp. 459–463, 2001.
ista: Haiman Z, Loeb A. 2001. What is the highest plausible redshift of luminous
quasars? The Astrophysical Journal. 552(2), 459–463.
mla: Haiman, Zoltán, and Abraham Loeb. “What Is the Highest Plausible Redshift of
Luminous Quasars?” The Astrophysical Journal, vol. 552, no. 2, American
Astronomical Society, 2001, pp. 459–63, doi:10.1086/320586.
short: Z. Haiman, A. Loeb, The Astrophysical Journal 552 (2001) 459–463.
date_created: 2024-09-06T12:10:38Z
date_published: 2001-05-10T00:00:00Z
date_updated: 2024-11-13T07:21:28Z
day: '10'
doi: 10.1086/320586
extern: '1'
external_id:
arxiv:
- astro-ph/0011529
intvolume: ' 552'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0011529
month: '05'
oa: 1
oa_version: Preprint
page: 459-463
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: What is the highest plausible redshift of luminous quasars?
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 552
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17832'
abstract:
- lang: eng
text: We study the constraints that high-redshift structure formation in the universe
places on warm dark matter (WDM) dominated cosmological models. We modify the
extended Press-Schechter formalism to derive the halo mass function in WDM models.
We show that our predictions agree with recent numerical simulations at low redshift
over the halo masses of interest. Applying our model to galaxy formation at high
redshift, we find that the loss of power on small scales, together with the delayed
collapse of low-mass objects, results in strong limits on the root-mean-square
velocity dispersion vrms,0 of the WDM particles at redshift zero. For fermions
decoupling while relativistic, these limits are equivalent to constraints on the
mass mX of the particles. The presence of a ≈4 × 109 M☉ supermassive black hole
at redshift 5.8, believed to power the quasar SDSS 1044-1215, implies mX ≳ 0.5
keV (or vrms,0 ≲ 0.10 km s-1), assuming that the quasar is unlensed and radiating
at or below the Eddington limit. Reionization by redshift 5.8 also implies a limit
on mX. If high-redshift galaxies produce ionizing photons with an efficiency similar
to their redshift-three counterparts, we find mX ≳ 1.2 keV (or vrms,0 ≲ 0.03 s-1).
However, given the uncertainties in current measurements from the proximity effect
of the ionizing background at redshift three, values of mX as low as 0.75 keV
(or vrms,0 = 0.06 s-1) are not ruled out. The limit weakens further to mX ≳ 0.4
keV (or vrms,0 ≲ 0.14 s-1), if, instead, the ionizing-photon production efficiency
is 10 times greater at high redshift, but this limit will tighten considerably
if reionization is shown in the future to have occurred at higher redshifts. WDM
models with mX ≲ 1 keV (or vrms,0 ≳ 0.04 s-1) produce a low-luminosity cutoff
in the high-redshift galaxy luminosity function that is directly detectable with
the Next Generation Space Telescope, and which serves as a direct constraint on
mX.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Rennan
full_name: Barkana, Rennan
last_name: Barkana
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Jeremiah P.
full_name: Ostriker, Jeremiah P.
last_name: Ostriker
citation:
ama: Barkana R, Haiman Z, Ostriker JP. Constraints on warm dark matter from cosmological
reionization. The Astrophysical Journal. 2001;558(2):482-496. doi:10.1086/322393
apa: Barkana, R., Haiman, Z., & Ostriker, J. P. (2001). Constraints on warm
dark matter from cosmological reionization. The Astrophysical Journal.
American Astronomical Society. https://doi.org/10.1086/322393
chicago: Barkana, Rennan, Zoltán Haiman, and Jeremiah P. Ostriker. “Constraints
on Warm Dark Matter from Cosmological Reionization.” The Astrophysical Journal.
American Astronomical Society, 2001. https://doi.org/10.1086/322393.
ieee: R. Barkana, Z. Haiman, and J. P. Ostriker, “Constraints on warm dark matter
from cosmological reionization,” The Astrophysical Journal, vol. 558, no.
2. American Astronomical Society, pp. 482–496, 2001.
ista: Barkana R, Haiman Z, Ostriker JP. 2001. Constraints on warm dark matter from
cosmological reionization. The Astrophysical Journal. 558(2), 482–496.
mla: Barkana, Rennan, et al. “Constraints on Warm Dark Matter from Cosmological
Reionization.” The Astrophysical Journal, vol. 558, no. 2, American Astronomical
Society, 2001, pp. 482–96, doi:10.1086/322393.
short: R. Barkana, Z. Haiman, J.P. Ostriker, The Astrophysical Journal 558 (2001)
482–496.
date_created: 2024-09-06T12:11:23Z
date_published: 2001-09-10T00:00:00Z
date_updated: 2024-11-13T07:23:48Z
day: '10'
doi: 10.1086/322393
extern: '1'
external_id:
arxiv:
- astro-ph/0102304
intvolume: ' 558'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0102304
month: '09'
oa: 1
oa_version: Preprint
page: 482-496
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: Constraints on warm dark matter from cosmological reionization
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 558
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17840'
abstract:
- lang: eng
text: The large-scale structure of high-redshift galaxies produces correlated anisotropy
in the far-infrared background (FIRB). In regions of the sky where the thermal
emission from Galactic dust is well below average, these high-redshift correlations
may be the most significant source of angular fluctuation power over a wide range
of angular scales, from ~7' to ~3°, and frequencies, from ~400 to ~1000 GHz. The
strength of this signal should allow detailed studies of the statistics of the
FIRB fluctuations, including the shape of the angular power spectrum at a given
frequency and the degree of coherence between FIRB maps at different frequencies.
The FIRB correlations depend on and hence constrain the redshift-dependent spectral
energy distributions, number counts, and clustering bias of the galaxies and active
nuclei that contribute to the background. We quantify the accuracy to which Planck
and a newly proposed balloon-borne mission, Explorer of Diffuse Galactic Emissions,
could constrain models of the high-redshift universe through the measurement of
FIRB fluctuations. We conclude that the average bias of high-redshift galaxies
could be measured to an accuracy of ≲1% or, for example, separated into four redshift
bins with ~10% accuracy.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Lloyd
full_name: Knox, Lloyd
last_name: Knox
- first_name: Asantha
full_name: Cooray, Asantha
last_name: Cooray
- first_name: Daniel
full_name: Eisenstein, Daniel
last_name: Eisenstein
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
citation:
ama: Knox L, Cooray A, Eisenstein D, Haiman Z. Probing early structure formation
with far‐infrared background correlations. The Astrophysical Journal. 2001;550(1):7-20.
doi:10.1086/319732
apa: Knox, L., Cooray, A., Eisenstein, D., & Haiman, Z. (2001). Probing early
structure formation with far‐infrared background correlations. The Astrophysical
Journal. American Astronomical Society. https://doi.org/10.1086/319732
chicago: Knox, Lloyd, Asantha Cooray, Daniel Eisenstein, and Zoltán Haiman. “Probing
Early Structure Formation with Far‐infrared Background Correlations.” The Astrophysical
Journal. American Astronomical Society, 2001. https://doi.org/10.1086/319732.
ieee: L. Knox, A. Cooray, D. Eisenstein, and Z. Haiman, “Probing early structure
formation with far‐infrared background correlations,” The Astrophysical Journal,
vol. 550, no. 1. American Astronomical Society, pp. 7–20, 2001.
ista: Knox L, Cooray A, Eisenstein D, Haiman Z. 2001. Probing early structure formation
with far‐infrared background correlations. The Astrophysical Journal. 550(1),
7–20.
mla: Knox, Lloyd, et al. “Probing Early Structure Formation with Far‐infrared Background
Correlations.” The Astrophysical Journal, vol. 550, no. 1, American Astronomical
Society, 2001, pp. 7–20, doi:10.1086/319732.
short: L. Knox, A. Cooray, D. Eisenstein, Z. Haiman, The Astrophysical Journal 550
(2001) 7–20.
date_created: 2024-09-06T12:17:01Z
date_published: 2001-03-20T00:00:00Z
date_updated: 2024-11-13T07:46:11Z
day: '20'
doi: 10.1086/319732
extern: '1'
external_id:
arxiv:
- astro-ph/0009151
intvolume: ' 550'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0009151
month: '03'
oa: 1
oa_version: Preprint
page: 7-20
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: Probing early structure formation with far‐infrared background correlations
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 550
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17847'
abstract:
- lang: eng
text: At the earliest epochs of structure formation in cold dark matter (CDM) cosmologies,
the smallest nonlinear objects are the numerous small halos that condense with
virial temperatures below ~104 K. Such "minihalos" are not yet resolved in large-scale
three-dimensional cosmological simulations. Here we employ a semianalytic method,
combined with three-dimensional simulations of individual minihalos, to examine
their importance during cosmological reionization. We show that, depending on
when reionization takes place, they potentially play an important role as sinks
of ionizing radiation. If reionization occurs at sufficiently high redshifts (zr
≳ 20), the intergalactic medium is heated to ~104 K and most minihalos never form.
On the other hand, if zr ≲ 20, a significant fraction (≳10%) of all baryons have
already collapsed into minihalos, and are subsequently removed from the halos
by photoevaporation as the ionizing background flux builds up. We show that this
process can require a significant budget of ionizing photons, exceeding the production
by straightforward extrapolations back in time of known quasar and galaxy populations
by a factor of up to ~10 and ~3, respectively.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Tom
full_name: Abel, Tom
last_name: Abel
- first_name: Piero
full_name: Madau, Piero
last_name: Madau
citation:
ama: Haiman Z, Abel T, Madau P. Photon consumption in minihalos during cosmological
reionization. The Astrophysical Journal. 2001;551(2):599-607. doi:10.1086/320232
apa: Haiman, Z., Abel, T., & Madau, P. (2001). Photon consumption in minihalos
during cosmological reionization. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/320232
chicago: Haiman, Zoltán, Tom Abel, and Piero Madau. “Photon Consumption in Minihalos
during Cosmological Reionization.” The Astrophysical Journal. American
Astronomical Society, 2001. https://doi.org/10.1086/320232.
ieee: Z. Haiman, T. Abel, and P. Madau, “Photon consumption in minihalos during
cosmological reionization,” The Astrophysical Journal, vol. 551, no. 2.
American Astronomical Society, pp. 599–607, 2001.
ista: Haiman Z, Abel T, Madau P. 2001. Photon consumption in minihalos during cosmological
reionization. The Astrophysical Journal. 551(2), 599–607.
mla: Haiman, Zoltán, et al. “Photon Consumption in Minihalos during Cosmological
Reionization.” The Astrophysical Journal, vol. 551, no. 2, American Astronomical
Society, 2001, pp. 599–607, doi:10.1086/320232.
short: Z. Haiman, T. Abel, P. Madau, The Astrophysical Journal 551 (2001) 599–607.
date_created: 2024-09-06T12:25:03Z
date_published: 2001-04-20T00:00:00Z
date_updated: 2024-11-13T07:51:12Z
day: '20'
doi: 10.1086/320232
extern: '1'
external_id:
arxiv:
- astro-ph/0009125
intvolume: ' 551'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0009125
month: '04'
oa: 1
oa_version: Preprint
page: 599-607
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: Photon consumption in minihalos during cosmological reionization
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 551
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17849'
abstract:
- lang: eng
text: We study the expected redshift evolution of galaxy cluster abundance between
0 ≲ z ≲ 3 in different cosmologies, including the effects of the cosmic equation
of state parameter w ≡ p/ρ. Using the halo mass function obtained in recent large-scale
numerical simulations, we model the expected cluster yields in a 12 deg2 Sunyaev-Zeldovich
effect (SZE) survey and a deep 104 deg2 X-ray survey over a wide range of cosmological
parameters. We quantify the statistical differences among cosmologies using both
the total number and redshift distribution of clusters. Provided that the local
cluster abundance is known to a few percent accuracy, we find only mild degeneracies
between w and either Ωm or h. As a result, both surveys will provide improved
constraints on Ωm and w. The Ωm-w degeneracy from both surveys is complementary
to those found either in studies of cosmic microwave background (CMB) anisotropies
or of high-redshift supernovae (SNe). As a result, combining these surveys together
with either CMB or SNe studies can reduce the statistical uncertainty on both
w and Ωm to levels below what could be obtained by combining only the latter two
data sets. Our results indicate a formal statistical uncertainty of ≈3% (68% confidence)
on both Ωm and w when the SZE survey is combined with either the CMB or SN data;
the large number of clusters in the X-ray survey further suppresses the degeneracy
between w and both Ωm and h. Systematics and internal evolution of cluster structure
at the present pose uncertainties above these levels. We briefly discuss and quantify
the relevant systematic errors. By focusing on clusters with measured temperatures
in the X-ray survey, we reduce our sensitivity to systematics such as nonstandard
evolution of internal cluster structure.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Joseph J.
full_name: Mohr, Joseph J.
last_name: Mohr
- first_name: Gilbert P.
full_name: Holder, Gilbert P.
last_name: Holder
citation:
ama: Haiman Z, Mohr JJ, Holder GP. Constraints on cosmological parameters from future
galaxy cluster surveys. The Astrophysical Journal. 2001;553(2):545-561.
doi:10.1086/320939
apa: Haiman, Z., Mohr, J. J., & Holder, G. P. (2001). Constraints on cosmological
parameters from future galaxy cluster surveys. The Astrophysical Journal.
American Astronomical Society. https://doi.org/10.1086/320939
chicago: Haiman, Zoltán, Joseph J. Mohr, and Gilbert P. Holder. “Constraints on
Cosmological Parameters from Future Galaxy Cluster Surveys.” The Astrophysical
Journal. American Astronomical Society, 2001. https://doi.org/10.1086/320939.
ieee: Z. Haiman, J. J. Mohr, and G. P. Holder, “Constraints on cosmological parameters
from future galaxy cluster surveys,” The Astrophysical Journal, vol. 553,
no. 2. American Astronomical Society, pp. 545–561, 2001.
ista: Haiman Z, Mohr JJ, Holder GP. 2001. Constraints on cosmological parameters
from future galaxy cluster surveys. The Astrophysical Journal. 553(2), 545–561.
mla: Haiman, Zoltán, et al. “Constraints on Cosmological Parameters from Future
Galaxy Cluster Surveys.” The Astrophysical Journal, vol. 553, no. 2, American
Astronomical Society, 2001, pp. 545–61, doi:10.1086/320939.
short: Z. Haiman, J.J. Mohr, G.P. Holder, The Astrophysical Journal 553 (2001) 545–561.
date_created: 2024-09-06T12:26:22Z
date_published: 2001-06-01T00:00:00Z
date_updated: 2024-11-13T07:58:34Z
day: '01'
doi: 10.1086/320939
extern: '1'
external_id:
arxiv:
- astro-ph/0002336
intvolume: ' 553'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/0002336
month: '06'
oa: 1
oa_version: Preprint
page: 545-561
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: Constraints on cosmological parameters from future galaxy cluster surveys
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 553
year: '2001'
...
---
OA_place: repository
OA_type: green
_id: '17814'
abstract:
- lang: eng
text: In hierarchical models of structure formation, an early cosmic UV background
(UVB) is produced by the small (Tvir ≲ 10^4 K) halos that collapse before reionization.
The UVB at energies below 13.6 eV suppresses the formation of stars or black holes
inside small halos by photodissociating their only cooling agent, molecular H2.
We self-consistently compute the buildup of the early UVB in Press-Schechter models,
coupled with H2 photodissociation both in the intergalactic medium (IGM) and inside
virialized halos. We find that the intergalactic H2 has a negligible effect on
the UVB, both because its initial optical depth is small (≲0.1) and because it
is photodissociated at an early stage. If the UV sources in the first collapsed
halos are stars, then their UV flux suppresses further star formation inside small
halos. This results in a pause in the buildup of the UVB, and reionization is
delayed until larger halos (Tvir ≳ 10^4 K) collapse. If the small halos host miniquasars
with hard spectra extending to ~1 keV, then their X-rays balance the effects of
the UVB, the negative feedback does not occur, and reionization could be caused
by the small halos.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Tom
full_name: Abel, Tom
last_name: Abel
- first_name: Martin J.
full_name: Rees, Martin J.
last_name: Rees
citation:
ama: Haiman Z, Abel T, Rees MJ. The radiative feedback of the first cosmological
objects. The Astrophysical Journal. 2000;534(1):11-24. doi:10.1086/308723
apa: Haiman, Z., Abel, T., & Rees, M. J. (2000). The radiative feedback of the
first cosmological objects. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/308723
chicago: Haiman, Zoltán, Tom Abel, and Martin J. Rees. “The Radiative Feedback of
the First Cosmological Objects.” The Astrophysical Journal. American Astronomical
Society, 2000. https://doi.org/10.1086/308723.
ieee: Z. Haiman, T. Abel, and M. J. Rees, “The radiative feedback of the first cosmological
objects,” The Astrophysical Journal, vol. 534, no. 1. American Astronomical
Society, pp. 11–24, 2000.
ista: Haiman Z, Abel T, Rees MJ. 2000. The radiative feedback of the first cosmological
objects. The Astrophysical Journal. 534(1), 11–24.
mla: Haiman, Zoltán, et al. “The Radiative Feedback of the First Cosmological Objects.”
The Astrophysical Journal, vol. 534, no. 1, American Astronomical Society,
2000, pp. 11–24, doi:10.1086/308723.
short: Z. Haiman, T. Abel, M.J. Rees, The Astrophysical Journal 534 (2000) 11–24.
date_created: 2024-09-06T11:43:22Z
date_published: 2000-05-01T00:00:00Z
date_updated: 2024-11-12T12:17:03Z
day: '01'
doi: 10.1086/308723
extern: '1'
external_id:
arxiv:
- astro-ph/9903336
intvolume: ' 534'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9903336
month: '05'
oa: 1
oa_version: Preprint
page: 11-24
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: The radiative feedback of the first cosmological objects
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 534
year: '2000'
...
---
OA_place: repository
OA_type: green
_id: '17817'
abstract:
- lang: eng
text: Recent observations of Type Ia supernovae (SNe) at redshifts 0 < z < 1 reveal
a progressive dimming that has been interpreted as evidence for a cosmological
constant of ΩΛ ~ 0.7. An alternative explanation of the SN results is an open
universe with ΩΛ = 0 and the presence of ≳0.1 μm dust grains with a mass density
of Ωdust ~ a few × 10-5 in the intergalactic (IG) medium. The same dust that dims
the SNe absorbs the cosmic UV/optical background radiation around ~1 μm, and reemits
it at far-infrared (FIR) wavelengths. Here we compare the FIR emission from IG
dust with observations of the cosmic microwave (CMB) and cosmic far-infrared backgrounds
(FIRB) by the DIRBE/FIRAS instruments. We find that the emission would not lead
to measurable distortion of the CMB, but would represent a substantial fraction
(≳75%) of the measured value of the FIRB in the 300-1000 μm range. This contribution
would be marginally consistent with the present unresolved fraction of the observed
FIRB in an open universe. However, we find that IG dust probably could not reconcile
the standard Ω = 1 CDM model with the SN observations, even if the necessary quantity
of dust existed. Future observations, capable of reliably resolving the FIRB to
a flux limit of ~0.5 mJy, along with a more precise measure of the coarse-grained
FIRB, will provide a definitive test of the IG dust hypothesis in all cosmologies.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Anthony
full_name: Aguirre, Anthony
last_name: Aguirre
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
citation:
ama: Aguirre A, Haiman Z. Cosmological constant or intergalactic dust? Constraints
from the cosmic far‐infrared background. The Astrophysical Journal. 2000;532(1):28-36.
doi:10.1086/308557
apa: Aguirre, A., & Haiman, Z. (2000). Cosmological constant or intergalactic
dust? Constraints from the cosmic far‐infrared background. The Astrophysical
Journal. American Astronomical Society. https://doi.org/10.1086/308557
chicago: Aguirre, Anthony, and Zoltán Haiman. “Cosmological Constant or Intergalactic
Dust? Constraints from the Cosmic Far‐infrared Background.” The Astrophysical
Journal. American Astronomical Society, 2000. https://doi.org/10.1086/308557.
ieee: A. Aguirre and Z. Haiman, “Cosmological constant or intergalactic dust? Constraints
from the cosmic far‐infrared background,” The Astrophysical Journal, vol.
532, no. 1. American Astronomical Society, pp. 28–36, 2000.
ista: Aguirre A, Haiman Z. 2000. Cosmological constant or intergalactic dust? Constraints
from the cosmic far‐infrared background. The Astrophysical Journal. 532(1), 28–36.
mla: Aguirre, Anthony, and Zoltán Haiman. “Cosmological Constant or Intergalactic
Dust? Constraints from the Cosmic Far‐infrared Background.” The Astrophysical
Journal, vol. 532, no. 1, American Astronomical Society, 2000, pp. 28–36,
doi:10.1086/308557.
short: A. Aguirre, Z. Haiman, The Astrophysical Journal 532 (2000) 28–36.
date_created: 2024-09-06T11:45:26Z
date_published: 2000-03-20T00:00:00Z
date_updated: 2024-11-12T12:25:50Z
day: '20'
doi: 10.1086/308557
extern: '1'
external_id:
arxiv:
- astro-ph/9907039
intvolume: ' 532'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9907039
month: '03'
oa: 1
oa_version: Preprint
page: 28-36
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: Cosmological constant or intergalactic dust? Constraints from the cosmic far‐infrared
background
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 532
year: '2000'
...
---
OA_place: repository
OA_type: green
_id: '17830'
abstract:
- lang: eng
text: We compute the expected angular power spectrum of the cosmic far infrared
background (FIRB). We find that the signal due to source correlations dominates
the shot noise for l ≲ 1000 and results in anisotropies with rms amplitudes [l(l
+ 1)Cl/2π]1/2 between 5% and 10% of the mean for l ≳ 150. The angular power spectrum
depends on several unknown quantities, such as the UV flux density evolution,
optical properties of the dust, biasing of the sources of the FIRB, and cosmological
parameters. However, when we require our models to reproduce the observed direct
current level of the FIRB, we find that the anisotropy is at least a few percent
in all cases. This anisotropy is detectable with proposed instruments, and its
measurement will provide strong constraints on models of galaxy evolution and
large-scale structure at redshifts up to at least z ~ 5.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Lloyd
full_name: Knox, Lloyd
last_name: Knox
citation:
ama: Haiman Z, Knox L. Correlations in the far‐infrared background. The Astrophysical
Journal. 2000;530(1):124-132. doi:10.1086/308374
apa: Haiman, Z., & Knox, L. (2000). Correlations in the far‐infrared background.
The Astrophysical Journal. American Astronomical Society. https://doi.org/10.1086/308374
chicago: Haiman, Zoltán, and Lloyd Knox. “Correlations in the Far‐infrared Background.”
The Astrophysical Journal. American Astronomical Society, 2000. https://doi.org/10.1086/308374.
ieee: Z. Haiman and L. Knox, “Correlations in the far‐infrared background,” The
Astrophysical Journal, vol. 530, no. 1. American Astronomical Society, pp.
124–132, 2000.
ista: Haiman Z, Knox L. 2000. Correlations in the far‐infrared background. The Astrophysical
Journal. 530(1), 124–132.
mla: Haiman, Zoltán, and Lloyd Knox. “Correlations in the Far‐infrared Background.”
The Astrophysical Journal, vol. 530, no. 1, American Astronomical Society,
2000, pp. 124–32, doi:10.1086/308374.
short: Z. Haiman, L. Knox, The Astrophysical Journal 530 (2000) 124–132.
date_created: 2024-09-06T12:09:57Z
date_published: 2000-02-10T00:00:00Z
date_updated: 2024-11-13T07:19:17Z
day: '10'
doi: 10.1086/308374
extern: '1'
external_id:
arxiv:
- astro-ph/9906399
intvolume: ' 530'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9906399
month: '02'
oa: 1
oa_version: Preprint
page: 124-132
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: Correlations in the far‐infrared background
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 530
year: '2000'
...
---
OA_place: repository
OA_type: green
_id: '17833'
abstract:
- lang: eng
text: 'We consider a class of models for the redshift evolution (between 0 ≲ z ≲
4) of the observed optical and X-ray quasar luminosity functions (LFs), with the
following assumptions: (1) the mass function of dark matter halos follows the
Press-Schechter theory, (2) the black hole (BH) mass scales linearly with the
halo mass, (3) quasars have a constant universal lifetime, and (4) a thin accretion
disk provides the optical luminosity of quasars, while the X-ray/optical flux
ratio is calibrated from a sample of observed quasars. The mass accretion rate,
, onto quasar BHs is a free parameter of the models, which we constrain using
the observed LFs. The accretion rate inferred from either the optical or X-ray
data under these assumptions generally decreases as a function of cosmic time
from z ≃ 4 to z ≃ 0. We find that a comparable accretion rate is inferred from
the X-ray and optical LF only if the X-ray/optical flux ratio decreases with BH
mass. Near z ≃ 0, drops to substantially sub-Eddington values at which advection-dominated
accretion flows (ADAFs) exist. Such a decline of M, possibly followed by a transition
to radiatively inefficient ADAFs, could explain both the absence of bright quasars
in the local universe and the faintness of accreting BHs at the centers of nearby
galaxies. We argue that a decline of the accretion rate of the quasar population
is indeed expected in cosmological structure formation models.'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Kristen
full_name: Menou, Kristen
last_name: Menou
citation:
ama: Haiman Z, Menou K. On the cosmological evolution of the luminosity function
and the accretion rate of quasars. The Astrophysical Journal. 2000;531(1):42-51.
doi:10.1086/308468
apa: Haiman, Z., & Menou, K. (2000). On the cosmological evolution of the luminosity
function and the accretion rate of quasars. The Astrophysical Journal.
American Astronomical Society. https://doi.org/10.1086/308468
chicago: Haiman, Zoltán, and Kristen Menou. “On the Cosmological Evolution of the
Luminosity Function and the Accretion Rate of Quasars.” The Astrophysical Journal.
American Astronomical Society, 2000. https://doi.org/10.1086/308468.
ieee: Z. Haiman and K. Menou, “On the cosmological evolution of the luminosity function
and the accretion rate of quasars,” The Astrophysical Journal, vol. 531,
no. 1. American Astronomical Society, pp. 42–51, 2000.
ista: Haiman Z, Menou K. 2000. On the cosmological evolution of the luminosity function
and the accretion rate of quasars. The Astrophysical Journal. 531(1), 42–51.
mla: Haiman, Zoltán, and Kristen Menou. “On the Cosmological Evolution of the Luminosity
Function and the Accretion Rate of Quasars.” The Astrophysical Journal,
vol. 531, no. 1, American Astronomical Society, 2000, pp. 42–51, doi:10.1086/308468.
short: Z. Haiman, K. Menou, The Astrophysical Journal 531 (2000) 42–51.
date_created: 2024-09-06T12:12:11Z
date_published: 2000-03-01T00:00:00Z
date_updated: 2024-11-13T07:27:11Z
day: '01'
doi: 10.1086/308468
extern: '1'
external_id:
arxiv:
- astro-ph/9810426
intvolume: ' 531'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9810426
month: '03'
oa: 1
oa_version: Preprint
page: 42-51
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: On the cosmological evolution of the luminosity function and the accretion
rate of quasars
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 531
year: '2000'
...
---
OA_place: repository
OA_type: green
_id: '17815'
abstract:
- lang: eng
text: The redshift at which the universe was reionized is currently unknown. We
examine the optimal strategy for extracting this redshift, zreion, from the spectra
of early sources. For a source located at a redshift zs beyond but close to the
reionization redshift, (1 + zreion) < (1 + zs) < 32/27(1 + zreion), the Gunn-Peterson
trough splits into disjoint Lyα, Lyβ, and possibly higher Lyman series troughs,
with some transmitted flux between these troughs. We show that although the transmitted
flux is suppressed considerably by the dense Lyα forest at high redshifts, it
could still be detectable as long as zreion ≲ 8. If the ionizing sources are bright
and have a short duty cycle (e.g., if they are miniquasars or starbursts with
a lifetime ≲106 yr), then breakthrough occurs shortly after the H II regions around
them overlap, and the transmitted flux provides a measurement of zreion. The Next
Generation Space Telescope will reach the spectroscopic sensitivity required for
such a measurement.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Abraham
full_name: Loeb, Abraham
last_name: Loeb
citation:
ama: Haiman Z, Loeb A. Determining the redshift of reionization from the spectra
of high‐redshift sources. The Astrophysical Journal. 1999;519(2):479-485.
doi:10.1086/307393
apa: Haiman, Z., & Loeb, A. (1999). Determining the redshift of reionization
from the spectra of high‐redshift sources. The Astrophysical Journal. American
Astronomical Society. https://doi.org/10.1086/307393
chicago: Haiman, Zoltán, and Abraham Loeb. “Determining the Redshift of Reionization
from the Spectra of High‐redshift Sources.” The Astrophysical Journal.
American Astronomical Society, 1999. https://doi.org/10.1086/307393.
ieee: Z. Haiman and A. Loeb, “Determining the redshift of reionization from the
spectra of high‐redshift sources,” The Astrophysical Journal, vol. 519,
no. 2. American Astronomical Society, pp. 479–485, 1999.
ista: Haiman Z, Loeb A. 1999. Determining the redshift of reionization from the
spectra of high‐redshift sources. The Astrophysical Journal. 519(2), 479–485.
mla: Haiman, Zoltán, and Abraham Loeb. “Determining the Redshift of Reionization
from the Spectra of High‐redshift Sources.” The Astrophysical Journal,
vol. 519, no. 2, American Astronomical Society, 1999, pp. 479–85, doi:10.1086/307393.
short: Z. Haiman, A. Loeb, The Astrophysical Journal 519 (1999) 479–485.
date_created: 2024-09-06T11:44:04Z
date_published: 1999-07-10T00:00:00Z
date_updated: 2024-11-12T12:19:49Z
day: '10'
doi: 10.1086/307393
extern: '1'
external_id:
arxiv:
- astro-ph/9807070
intvolume: ' 519'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9807070
month: '07'
oa: 1
oa_version: Preprint
page: 479-485
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: Determining the redshift of reionization from the spectra of high‐redshift
sources
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 519
year: '1999'
...
---
OA_place: repository
OA_type: green
_id: '17835'
abstract:
- lang: eng
text: Models are presented for the Lyα emission of dusty high-redshift galaxies
by combining the Press-Schechter formalism with a treatment of the inhomogeneous
dust distribution inside galaxies. It is found that the amount of Lyα radiation
escaping from the galaxies strongly depends on the time over which the dust is
produced through stellar activity and on the ambient inhomogeneity of the H II
regions that surround the ionizing OB stars. Good agreement is found with recent
observations, as well as with previous nondetections. Although a detailed determination
of the individual model parameters is precluded by uncertainties, we find that
(1) the dust content in primordial galaxies builds up in no more than ~5 × 108
yr, (2) the galactic H II regions are inhomogeneous with a cloud-covering factor
of order unity, and (3) the overall star formation efficiency is at least ~5%.
It is predicted that future observations can detect these Lyα galaxies up to redshifts
of ~8. If the universe is reionized at zr ≲ 8, the corresponding decline in the
number of Lyα emitters at z ≳ zr could prove to be a useful probe of the reionization
epoch.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Marco
full_name: Spaans, Marco
last_name: Spaans
citation:
ama: Haiman Z, Spaans M. Models for dusty Lyα emitters at high redshift. The
Astrophysical Journal. 1999;518(1):138-144. doi:10.1086/307276
apa: Haiman, Z., & Spaans, M. (1999). Models for dusty Lyα emitters at high
redshift. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.1086/307276
chicago: Haiman, Zoltán, and Marco Spaans. “Models for Dusty Lyα Emitters at High
Redshift.” The Astrophysical Journal. American Astronomical Society, 1999.
https://doi.org/10.1086/307276.
ieee: Z. Haiman and M. Spaans, “Models for dusty Lyα emitters at high redshift,”
The Astrophysical Journal, vol. 518, no. 1. American Astronomical Society,
pp. 138–144, 1999.
ista: Haiman Z, Spaans M. 1999. Models for dusty Lyα emitters at high redshift.
The Astrophysical Journal. 518(1), 138–144.
mla: Haiman, Zoltán, and Marco Spaans. “Models for Dusty Lyα Emitters at High Redshift.”
The Astrophysical Journal, vol. 518, no. 1, American Astronomical Society,
1999, pp. 138–44, doi:10.1086/307276.
short: Z. Haiman, M. Spaans, The Astrophysical Journal 518 (1999) 138–144.
date_created: 2024-09-06T12:13:30Z
date_published: 1999-06-10T00:00:00Z
date_updated: 2024-11-13T07:30:03Z
day: '10'
doi: 10.1086/307276
extern: '1'
external_id:
arxiv:
- astro-ph/9809223
intvolume: ' 518'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9809223
month: '06'
oa: 1
oa_version: Preprint
page: 138-144
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: Models for dusty Lyα emitters at high redshift
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 518
year: '1999'
...
---
OA_place: repository
OA_type: green
_id: '17837'
abstract:
- lang: eng
text: High-resolution, deep-imaging surveys are instrumental in setting constraints
on semianalytical structure formation models in cold dark matter (CDM) cosmologies.
We show here that the lack of unresolved B-band "dropouts" with V>25 mag in the
Hubble Deep Field appears to be inconsistent with the number of "miniquasars"
expected if massive black holes form with a constant universal efficiency in all
CDM halos. To reconcile the models with the data, a mechanism is needed that suppresses
the formation of active nuclei in halos with circular velocities vcirc≲50-75 km
s-1. This feedback naturally arises because of the photoionization heating of
the gas by the UV background. We consider several alternative effects that would
help reducing the number of miniquasars and find that these cannot alone account
for the observed lack of detections. If reddening by dust can be neglected at
early epochs, consistency with the optical data also requires that the luminous
extent of dwarf galaxies at high redshifts be larger than a few percent of the
virial radii of their dark matter halos, in order not to overpredict the number
of pointlike B-band dropouts. Future deep observations in the J and H bands with
NICMOS might reveal several z≳5 objects per field or provide even stronger constraints
on the models than existing B, V, and I data.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Piero
full_name: Madau, Piero
last_name: Madau
- first_name: Abraham
full_name: Loeb, Abraham
last_name: Loeb
citation:
ama: Haiman Z, Madau P, Loeb A. Constraints from the Hubble deep field on high‐redshift
quasar models. The Astrophysical Journal. 1999;514(2):535-543. doi:10.1086/306969
apa: Haiman, Z., Madau, P., & Loeb, A. (1999). Constraints from the Hubble deep
field on high‐redshift quasar models. The Astrophysical Journal. American
Astronomical Society. https://doi.org/10.1086/306969
chicago: Haiman, Zoltán, Piero Madau, and Abraham Loeb. “Constraints from the Hubble
Deep Field on High‐redshift Quasar Models.” The Astrophysical Journal.
American Astronomical Society, 1999. https://doi.org/10.1086/306969.
ieee: Z. Haiman, P. Madau, and A. Loeb, “Constraints from the Hubble deep field
on high‐redshift quasar models,” The Astrophysical Journal, vol. 514, no.
2. American Astronomical Society, pp. 535–543, 1999.
ista: Haiman Z, Madau P, Loeb A. 1999. Constraints from the Hubble deep field on
high‐redshift quasar models. The Astrophysical Journal. 514(2), 535–543.
mla: Haiman, Zoltán, et al. “Constraints from the Hubble Deep Field on High‐redshift
Quasar Models.” The Astrophysical Journal, vol. 514, no. 2, American Astronomical
Society, 1999, pp. 535–43, doi:10.1086/306969.
short: Z. Haiman, P. Madau, A. Loeb, The Astrophysical Journal 514 (1999) 535–543.
date_created: 2024-09-06T12:14:48Z
date_published: 1999-04-01T00:00:00Z
date_updated: 2024-11-13T07:37:51Z
day: '01'
doi: 10.1086/306969
extern: '1'
external_id:
arxiv:
- astro-ph/9805258
intvolume: ' 514'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9805258
month: '04'
oa: 1
oa_version: Preprint
page: 535-543
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: Constraints from the Hubble deep field on high‐redshift quasar models
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 514
year: '1999'
...
---
OA_place: repository
OA_type: green
_id: '17839'
abstract:
- lang: eng
text: 'We study the observational signatures of a potential population of low-luminosity
quasars at high redshifts in a ΛCDM cosmology. We derive the evolution of the
quasar luminosity function at fainter luminosities and higher redshifts than currently
detected based on three assumptions: (1) the formation of dark matter halos follows
the Press-Schechter theory, (2) the ratio of central black hole mass to halo mass
is the same for all halos, and (3) the light curve of quasars, in Eddington units,
is universal. We show that a universal light curve provides an excellent fit to
the observed quasar luminosity function at redshifts 2.6 < z < 4.5. By extrapolating
the evolution of this luminosity function to higher redshifts (4.5 < z < 20),
we find that the associated early population of low-luminosity quasars reionizes
the universe at a redshift z ~ 12. The reprocessing of the UV light of these quasars
by dust from early Type II supernovae distorts the microwave background spectrum
by a Compton y-parameter y ~ 10-5, comparable to the lower limit set by COBE.
The Next Generation Space Telescope could detect tens of quasars per arcmin-2
from redshifts z > 10 with its proposed 1 nJy sensitivity at 1-3.5 μm. Absorption
spectra of several such quasars would reveal the reionization history of the universe.'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Abraham
full_name: Loeb, Abraham
last_name: Loeb
citation:
ama: Haiman Z, Loeb A. Observational signatures of the first quasars. The Astrophysical
Journal. 1998;503(2):505-517. doi:10.1086/306017
apa: Haiman, Z., & Loeb, A. (1998). Observational signatures of the first quasars.
The Astrophysical Journal. American Astronomical Society. https://doi.org/10.1086/306017
chicago: Haiman, Zoltán, and Abraham Loeb. “Observational Signatures of the First
Quasars.” The Astrophysical Journal. American Astronomical Society, 1998.
https://doi.org/10.1086/306017.
ieee: Z. Haiman and A. Loeb, “Observational signatures of the first quasars,” The
Astrophysical Journal, vol. 503, no. 2. American Astronomical Society, pp.
505–517, 1998.
ista: Haiman Z, Loeb A. 1998. Observational signatures of the first quasars. The
Astrophysical Journal. 503(2), 505–517.
mla: Haiman, Zoltán, and Abraham Loeb. “Observational Signatures of the First Quasars.”
The Astrophysical Journal, vol. 503, no. 2, American Astronomical Society,
1998, pp. 505–17, doi:10.1086/306017.
short: Z. Haiman, A. Loeb, The Astrophysical Journal 503 (1998) 505–517.
date_created: 2024-09-06T12:16:27Z
date_published: 1998-08-20T00:00:00Z
date_updated: 2024-11-13T07:43:28Z
day: '20'
doi: 10.1086/306017
extern: '1'
external_id:
arxiv:
- astro-ph/9710208
intvolume: ' 503'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9710208
month: '08'
oa: 1
oa_version: Preprint
page: 505-517
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: Observational signatures of the first quasars
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 503
year: '1998'
...
---
OA_place: repository
OA_type: green
_id: '17821'
abstract:
- lang: eng
text: We investigate the ability of primordial gas clouds to retain molecular hydrogen
(H2) during the initial phase of the reionization epoch. We find that before the
Strömgren spheres of the individual ionizing sources overlap, the UV background
below the ionization threshold is able to penetrate large clouds and suppress
their H2 abundance. The consequent lack of H2 cooling could prevent the collapse
and fragmentation of clouds with virial temperatures Tvir ≲ 10^4 K (or masses
≲10^8 M☉[(1 + zvir)/10]-^3/2). This negative feedback on structure formation arises
from the very first ionizing sources and precedes the feedback due to the photoionization
heating.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
orcid: 0000-0003-3633-5403
- first_name: Martin J.
full_name: Rees, Martin J.
last_name: Rees
- first_name: Abraham
full_name: Loeb, Abraham
last_name: Loeb
citation:
ama: Haiman Z, Rees MJ, Loeb A. Destruction of molecular hydrogen during cosmological
reionization. The Astrophysical Journal. 1997;476(2):458-463. doi:10.1086/303647
apa: Haiman, Z., Rees, M. J., & Loeb, A. (1997). Destruction of molecular hydrogen
during cosmological reionization. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1086/303647
chicago: Haiman, Zoltán, Martin J. Rees, and Abraham Loeb. “Destruction of Molecular
Hydrogen during Cosmological Reionization.” The Astrophysical Journal.
American Astronomical Society, 1997. https://doi.org/10.1086/303647.
ieee: Z. Haiman, M. J. Rees, and A. Loeb, “Destruction of molecular hydrogen during
cosmological reionization,” The Astrophysical Journal, vol. 476, no. 2.
American Astronomical Society, pp. 458–463, 1997.
ista: Haiman Z, Rees MJ, Loeb A. 1997. Destruction of molecular hydrogen during
cosmological reionization. The Astrophysical Journal. 476(2), 458–463.
mla: Haiman, Zoltán, et al. “Destruction of Molecular Hydrogen during Cosmological
Reionization.” The Astrophysical Journal, vol. 476, no. 2, American Astronomical
Society, 1997, pp. 458–63, doi:10.1086/303647.
short: Z. Haiman, M.J. Rees, A. Loeb, The Astrophysical Journal 476 (1997) 458–463.
date_created: 2024-09-06T11:51:44Z
date_published: 1997-02-20T00:00:00Z
date_updated: 2024-11-12T12:35:58Z
day: '20'
doi: 10.1086/303647
extern: '1'
external_id:
arxiv:
- astro-ph/9608130
intvolume: ' 476'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.astro-ph/9608130
month: '02'
oa: 1
oa_version: Preprint
page: 458-463
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: Destruction of molecular hydrogen during cosmological reionization
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 476
year: '1997'
...