---
_id: '17649'
abstract:
- lang: eng
text: Weak lensing convergence peaks are a promising tool to probe nonlinear structure
evolution at late times, providing additional cosmological information beyond
second-order statistics. Previous theoretical and observational studies have shown
that the cosmological constraints on Ωm and σ8 are improved by a factor of up
to ~ 2 when peak counts and second-order statistics are combined, compared to
using the latter alone. We study the origin of lensing peaks using observational
data from the 154 deg2 Canada-France-Hawaii Telescope Lensing Survey. We found
that while high peaks (with height κ >3.5 σκ, where σκ is the r.m.s. of the convergence
κ) are typically due to one single massive halo of ~1015M⊙, low peaks (κ <~ σκ)
are associated with constellations of 2-8 smaller halos (<~1013M⊙). In addition,
halos responsible for forming low peaks are found to be significantly offset from
the line-of-sight towards the peak center (impact parameter >~ their virial radii),
compared with ~0.25 virial radii for halos linked with high peaks, hinting that
low peaks are more immune to baryonic processes whose impact is confined to the
inner regions of the dark matter halos. Our findings are in good agreement with
results from the simulation work by Yang el al. (2011).
article_number: '043533'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jia
full_name: Liu, Jia
last_name: Liu
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Liu J, Haiman Z. Origin of weak lensing convergence peaks. Physical Review
D. 2016;94(4). doi:10.1103/physrevd.94.043533
apa: Liu, J., & Haiman, Z. (2016). Origin of weak lensing convergence peaks.
Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.94.043533
chicago: Liu, Jia, and Zoltán Haiman. “Origin of Weak Lensing Convergence Peaks.”
Physical Review D. American Physical Society, 2016. https://doi.org/10.1103/physrevd.94.043533.
ieee: J. Liu and Z. Haiman, “Origin of weak lensing convergence peaks,” Physical
Review D, vol. 94, no. 4. American Physical Society, 2016.
ista: Liu J, Haiman Z. 2016. Origin of weak lensing convergence peaks. Physical
Review D. 94(4), 043533.
mla: Liu, Jia, and Zoltán Haiman. “Origin of Weak Lensing Convergence Peaks.” Physical
Review D, vol. 94, no. 4, 043533, American Physical Society, 2016, doi:10.1103/physrevd.94.043533.
short: J. Liu, Z. Haiman, Physical Review D 94 (2016).
date_created: 2024-09-06T07:28:02Z
date_published: 2016-08-26T00:00:00Z
date_updated: 2024-09-24T12:59:05Z
day: '26'
doi: 10.1103/physrevd.94.043533
extern: '1'
external_id:
arxiv:
- '1606.01318'
intvolume: ' 94'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.1606.01318'
month: '08'
oa: 1
oa_version: Preprint
publication: Physical Review D
publication_identifier:
issn:
- 2470-0010
- 2470-0029
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Origin of weak lensing convergence peaks
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 94
year: '2016'
...
---
_id: '17654'
abstract:
- lang: eng
text: We explore the formation of massive high-redshift Population III (Pop III)
galaxies through photoionization feedback. We consider dark matter haloes formed
from progenitors that have undergone no star formation as a result of early reionization
and photoevaporation caused by a nearby galaxy. Once such a halo reaches ≈109 M⊙,
corresponding to the Jeans mass of the photoheated intergalactic medium at z ≈
7, pristine gas is able to collapse into the halo, potentially producing a massive
Pop III starburst. We suggest that this scenario may explain the recent observation
of strong He ii 1640 Å line emission in CR 7, which is consistent with ∼107 M⊙
of young Pop III stars. Such a large mass of Pop III stars is unlikely without
the photoionization feedback scenario, because star formation is expected to inject
metals into haloes above the atomic cooling threshold (∼108 M⊙ at z ≈ 7). We use
merger trees to analytically estimate the abundance of observable Pop III galaxies
formed through this channel, and find a number density of ≈10−7 Mpc−3 at z = 6.6
(the redshift of CR 7). This is approximately a factor of 10 lower than the density
of Ly α emitters as bright as CR 7.
article_processing_charge: No
article_type: original
author:
- first_name: Eli
full_name: Visbal, Eli
last_name: Visbal
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Greg L.
full_name: Bryan, Greg L.
last_name: Bryan
citation:
ama: 'Visbal E, Haiman Z, Bryan GL. Formation of massive Population III galaxies
through photoionization feedback: A possible explanation for CR 7. Monthly
Notices of the Royal Astronomical Society: Letters. 2016;460(1):L59-L63. doi:10.1093/mnrasl/slw071'
apa: 'Visbal, E., Haiman, Z., & Bryan, G. L. (2016). Formation of massive Population
III galaxies through photoionization feedback: A possible explanation for CR 7.
Monthly Notices of the Royal Astronomical Society: Letters. Oxford University
Press. https://doi.org/10.1093/mnrasl/slw071'
chicago: 'Visbal, Eli, Zoltán Haiman, and Greg L. Bryan. “Formation of Massive Population
III Galaxies through Photoionization Feedback: A Possible Explanation for CR 7.”
Monthly Notices of the Royal Astronomical Society: Letters. Oxford University
Press, 2016. https://doi.org/10.1093/mnrasl/slw071.'
ieee: 'E. Visbal, Z. Haiman, and G. L. Bryan, “Formation of massive Population III
galaxies through photoionization feedback: A possible explanation for CR 7,” Monthly
Notices of the Royal Astronomical Society: Letters, vol. 460, no. 1. Oxford
University Press, pp. L59–L63, 2016.'
ista: 'Visbal E, Haiman Z, Bryan GL. 2016. Formation of massive Population III galaxies
through photoionization feedback: A possible explanation for CR 7. Monthly Notices
of the Royal Astronomical Society: Letters. 460(1), L59–L63.'
mla: 'Visbal, Eli, et al. “Formation of Massive Population III Galaxies through
Photoionization Feedback: A Possible Explanation for CR 7.” Monthly Notices
of the Royal Astronomical Society: Letters, vol. 460, no. 1, Oxford University
Press, 2016, pp. L59–63, doi:10.1093/mnrasl/slw071.'
short: 'E. Visbal, Z. Haiman, G.L. Bryan, Monthly Notices of the Royal Astronomical
Society: Letters 460 (2016) L59–L63.'
date_created: 2024-09-06T07:32:23Z
date_published: 2016-04-14T00:00:00Z
date_updated: 2024-09-24T14:19:51Z
day: '14'
doi: 10.1093/mnrasl/slw071
extern: '1'
intvolume: ' 460'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnrasl/slw071
month: '04'
oa: 1
oa_version: Published Version
page: L59-L63
publication: 'Monthly Notices of the Royal Astronomical Society: Letters'
publication_identifier:
issn:
- 1745-3925
- 1745-3933
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Formation of massive Population III galaxies through photoionization feedback:
A possible explanation for CR 7'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 460
year: '2016'
...
---
_id: '17656'
abstract:
- lang: eng
text: We explore the evolution of stellar mass black hole binaries (BHBs) which
are formed in the self-gravitating discs of active galactic nuclei (AGN). Hardening
due to three-body scattering and gaseous drag are effective mechanisms that reduce
the semimajor axis of a BHB to radii where gravitational waves take over, on time-scales
shorter than the typical lifetime of the AGN disc. Taking observationally motivated
assumptions for the rate of star formation in AGN discs, we find a rate of disc-induced
BHB mergers (| $\mathcal {R} \sim 3\ {\rm yr}^{-1}\ {\rm Gpc}^{-3}$ |, but with
large uncertainties) that is comparable with existing estimates of the field rate
of BHB mergers, and the approximate BHB merger rate implied by the recent Advanced
LIGO detection of GW150914. BHBs formed thorough this channel will frequently
be associated with luminous AGN, which are relatively rare within the sky error
regions of future gravitational wave detector arrays. This channel could also
possess a (potentially transient) electromagnetic counterpart due to super-Eddington
accretion on to the stellar mass black hole following the merger.
article_processing_charge: No
article_type: original
author:
- first_name: Nicholas C.
full_name: Stone, Nicholas C.
last_name: Stone
- first_name: Brian D.
full_name: Metzger, Brian D.
last_name: Metzger
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Stone NC, Metzger BD, Haiman Z. Assisted inspirals of stellar mass black holes
embedded in AGN discs: Solving the ‘final au problem.’ Monthly Notices of the
Royal Astronomical Society. 2016;464(1):946-954. doi:10.1093/mnras/stw2260'
apa: 'Stone, N. C., Metzger, B. D., & Haiman, Z. (2016). Assisted inspirals
of stellar mass black holes embedded in AGN discs: Solving the ‘final au problem.’
Monthly Notices of the Royal Astronomical Society. Oxford University Press.
https://doi.org/10.1093/mnras/stw2260'
chicago: 'Stone, Nicholas C., Brian D. Metzger, and Zoltán Haiman. “Assisted Inspirals
of Stellar Mass Black Holes Embedded in AGN Discs: Solving the ‘Final Au Problem.’”
Monthly Notices of the Royal Astronomical Society. Oxford University Press,
2016. https://doi.org/10.1093/mnras/stw2260.'
ieee: 'N. C. Stone, B. D. Metzger, and Z. Haiman, “Assisted inspirals of stellar
mass black holes embedded in AGN discs: Solving the ‘final au problem,’” Monthly
Notices of the Royal Astronomical Society, vol. 464, no. 1. Oxford University
Press, pp. 946–954, 2016.'
ista: 'Stone NC, Metzger BD, Haiman Z. 2016. Assisted inspirals of stellar mass
black holes embedded in AGN discs: Solving the ‘final au problem’. Monthly Notices
of the Royal Astronomical Society. 464(1), 946–954.'
mla: 'Stone, Nicholas C., et al. “Assisted Inspirals of Stellar Mass Black Holes
Embedded in AGN Discs: Solving the ‘Final Au Problem.’” Monthly Notices of
the Royal Astronomical Society, vol. 464, no. 1, Oxford University Press,
2016, pp. 946–54, doi:10.1093/mnras/stw2260.'
short: N.C. Stone, B.D. Metzger, Z. Haiman, Monthly Notices of the Royal Astronomical
Society 464 (2016) 946–954.
date_created: 2024-09-06T07:35:10Z
date_published: 2016-09-08T00:00:00Z
date_updated: 2024-09-25T07:05:41Z
day: '08'
doi: 10.1093/mnras/stw2260
extern: '1'
intvolume: ' 464'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw2260
month: '09'
oa: 1
oa_version: Published Version
page: 946-954
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Assisted inspirals of stellar mass black holes embedded in AGN discs: Solving
the ‘final au problem’'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 464
year: '2016'
...
---
_id: '17658'
abstract:
- lang: eng
text: We study circumbinary accretion discs in the framework of the restricted three-body
problem (R3Bp) and via numerically solving the height-integrated equations of
viscous hydrodynamics. Varying the mass ratio of the binary, we find a pronounced
change in the behaviour of the disc near mass ratio q ≡ Ms/Mp ∼ 0.04. For mass
ratios above q = 0.04, solutions for the hydrodynamic flow transition from steady,
to strongly fluctuating; a narrow annular gap in the surface density around the
secondary's orbit changes to a hollow central cavity; and a spatial symmetry is
lost, resulting in a lopsided disc. This phase transition is coincident with the
mass ratio above which stable orbits do not exist around the L4 and L5 equilibrium
points of the R3Bp. Using the disco code, we find that for thin discs, for which
a gap or cavity can remain open, the mass ratio of the transition is relatively
insensitive to disc viscosity and pressure. The q = 0.04 transition has relevance
for the evolution of massive black hole binary+disc systems at the centres of
galactic nuclei, as well as for young stellar binaries and possibly planets around
brown dwarfs.
article_processing_charge: No
article_type: original
author:
- first_name: Daniel J.
full_name: D'Orazio, Daniel J.
last_name: D'Orazio
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Paul
full_name: Duffell, Paul
last_name: Duffell
- first_name: Andrew
full_name: MacFadyen, Andrew
last_name: MacFadyen
- first_name: Brian
full_name: Farris, Brian
last_name: Farris
citation:
ama: D’Orazio DJ, Haiman Z, Duffell P, MacFadyen A, Farris B. A transition in circumbinary
accretion discs at a binary mass ratio of 1:25. Monthly Notices of the Royal
Astronomical Society. 2016;459(3):2379-2393. doi:10.1093/mnras/stw792
apa: D’Orazio, D. J., Haiman, Z., Duffell, P., MacFadyen, A., & Farris, B. (2016).
A transition in circumbinary accretion discs at a binary mass ratio of 1:25. Monthly
Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stw792
chicago: D’Orazio, Daniel J., Zoltán Haiman, Paul Duffell, Andrew MacFadyen, and
Brian Farris. “A Transition in Circumbinary Accretion Discs at a Binary Mass Ratio
of 1:25.” Monthly Notices of the Royal Astronomical Society. Oxford University
Press, 2016. https://doi.org/10.1093/mnras/stw792.
ieee: D. J. D’Orazio, Z. Haiman, P. Duffell, A. MacFadyen, and B. Farris, “A transition
in circumbinary accretion discs at a binary mass ratio of 1:25,” Monthly Notices
of the Royal Astronomical Society, vol. 459, no. 3. Oxford University Press,
pp. 2379–2393, 2016.
ista: D’Orazio DJ, Haiman Z, Duffell P, MacFadyen A, Farris B. 2016. A transition
in circumbinary accretion discs at a binary mass ratio of 1:25. Monthly Notices
of the Royal Astronomical Society. 459(3), 2379–2393.
mla: D’Orazio, Daniel J., et al. “A Transition in Circumbinary Accretion Discs at
a Binary Mass Ratio of 1:25.” Monthly Notices of the Royal Astronomical Society,
vol. 459, no. 3, Oxford University Press, 2016, pp. 2379–93, doi:10.1093/mnras/stw792.
short: D.J. D’Orazio, Z. Haiman, P. Duffell, A. MacFadyen, B. Farris, Monthly Notices
of the Royal Astronomical Society 459 (2016) 2379–2393.
date_created: 2024-09-06T07:36:39Z
date_published: 2016-04-06T00:00:00Z
date_updated: 2024-09-25T07:14:30Z
day: '06'
doi: 10.1093/mnras/stw792
extern: '1'
intvolume: ' 459'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw792
month: '04'
oa: 1
oa_version: Published Version
page: 2379-2393
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: A transition in circumbinary accretion discs at a binary mass ratio of 1:25
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 459
year: '2016'
...
---
_id: '17659'
abstract:
- lang: eng
text: The recent discovery of the gravitational wave source GW150914 has revealed
a coalescing binary black hole (BBH) with masses of ∼30 M⊙. Previous proposals
for the origin of such a massive binary include Population III (PopIII) stars.
PopIII stars are efficient producers of BBHs and of a gravitational wave background
(GWB) in the 10–100 Hz band, and also of ionizing radiation in the early Universe.
We quantify the relation between the amplitude of the GWB (Ωgw) and the electron
scattering optical depth (τe), produced by PopIII stars, assuming that fesc ≈
10 per cent of their ionizing radiation escapes into the intergalactic medium.
We find that PopIII stars would produce a GWB that is detectable by the future
O5 LIGO/Virgo if τe ≳ 0.07, consistent with the recent Planck measurement of τe
= 0.055 ± 0.09. Moreover, the spectral index of the background from PopIII BBHs
becomes as small as dln Ωgw/dln f ≲ 0.3 at f ≳ 30 Hz, which is significantly flatter
than the value ∼2/3 generically produced by lower redshift and less-massive BBHs.
A detection of the unique flattening at such low frequencies by the O5 LIGO/Virgo
will indicate the existence of a high-chirp mass, high-redshift BBH population,
which is consistent with the PopIII origin. A precise characterization of the
spectral shape near 30–50 Hz by the Einstein Telescope could also constrain the
PopIII initial mass function and star formation rate.
article_processing_charge: No
article_type: original
author:
- first_name: Kohei
full_name: Inayoshi, Kohei
last_name: Inayoshi
- first_name: Kazumi
full_name: Kashiyama, Kazumi
last_name: Kashiyama
- first_name: Eli
full_name: Visbal, Eli
last_name: Visbal
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Inayoshi K, Kashiyama K, Visbal E, Haiman Z. Gravitational wave background
from Population III binary black holes consistent with cosmic reionization. Monthly
Notices of the Royal Astronomical Society. 2016;461(3):2722-2727. doi:10.1093/mnras/stw1431
apa: Inayoshi, K., Kashiyama, K., Visbal, E., & Haiman, Z. (2016). Gravitational
wave background from Population III binary black holes consistent with cosmic
reionization. Monthly Notices of the Royal Astronomical Society. Oxford
University Press. https://doi.org/10.1093/mnras/stw1431
chicago: Inayoshi, Kohei, Kazumi Kashiyama, Eli Visbal, and Zoltán Haiman. “Gravitational
Wave Background from Population III Binary Black Holes Consistent with Cosmic
Reionization.” Monthly Notices of the Royal Astronomical Society. Oxford
University Press, 2016. https://doi.org/10.1093/mnras/stw1431.
ieee: K. Inayoshi, K. Kashiyama, E. Visbal, and Z. Haiman, “Gravitational wave background
from Population III binary black holes consistent with cosmic reionization,” Monthly
Notices of the Royal Astronomical Society, vol. 461, no. 3. Oxford University
Press, pp. 2722–2727, 2016.
ista: Inayoshi K, Kashiyama K, Visbal E, Haiman Z. 2016. Gravitational wave background
from Population III binary black holes consistent with cosmic reionization. Monthly
Notices of the Royal Astronomical Society. 461(3), 2722–2727.
mla: Inayoshi, Kohei, et al. “Gravitational Wave Background from Population III
Binary Black Holes Consistent with Cosmic Reionization.” Monthly Notices of
the Royal Astronomical Society, vol. 461, no. 3, Oxford University Press,
2016, pp. 2722–27, doi:10.1093/mnras/stw1431.
short: K. Inayoshi, K. Kashiyama, E. Visbal, Z. Haiman, Monthly Notices of the Royal
Astronomical Society 461 (2016) 2722–2727.
date_created: 2024-09-06T07:37:31Z
date_published: 2016-06-21T00:00:00Z
date_updated: 2024-09-25T07:17:34Z
day: '21'
doi: 10.1093/mnras/stw1431
extern: '1'
intvolume: ' 461'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw1431
month: '06'
oa: 1
oa_version: Published Version
page: 2722-2727
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Gravitational wave background from Population III binary black holes consistent
with cosmic reionization
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 461
year: '2016'
...
---
_id: '17666'
abstract:
- lang: eng
text: We have investigated a recently proposed halo-based model, Camelus, for predicting
weak-lensing peak counts, and compared its results over a collection of 162 cosmologies
with those from N-body simulations. While counts from both models agree for peaks
with S/N>1 (where S/N is the ratio of the peak height to the r.m.s. shape noise),
we find ≈50% fewer counts for peaks near S/N=0 and significantly higher counts
in the negative S/N tail. Adding shape noise reduces the differences to within
20% for all cosmologies. We also found larger covariances that are more sensitive
to cosmological parameters. As a result, credibility regions in the {Ωm,σ8} are
≈30% larger. Even though the credible contours are commensurate, each model draws
its predictive power from different types of peaks. Low peaks, especially those
with 23). Our results confirm the
importance of using a cosmology-dependent covariance with at least a 14\% improvement
in parameter constraints. We identified the covariance estimation as the main
driver behind differences in inference, and suggest possible ways to make Camelus
even more useful as a highly accurate peak count emulator.
article_number: '083506'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: José Manuel
full_name: Zorrilla Matilla, José Manuel
last_name: Zorrilla Matilla
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Daniel
full_name: Hsu, Daniel
last_name: Hsu
- first_name: Arushi
full_name: Gupta, Arushi
last_name: Gupta
- first_name: Andrea
full_name: Petri, Andrea
last_name: Petri
citation:
ama: Zorrilla Matilla JM, Haiman Z, Hsu D, Gupta A, Petri A. Do dark matter halos
explain lensing peaks? Physical Review D. 2016;94(8). doi:10.1103/physrevd.94.083506
apa: Zorrilla Matilla, J. M., Haiman, Z., Hsu, D., Gupta, A., & Petri, A. (2016).
Do dark matter halos explain lensing peaks? Physical Review D. American
Physical Society. https://doi.org/10.1103/physrevd.94.083506
chicago: Zorrilla Matilla, José Manuel, Zoltán Haiman, Daniel Hsu, Arushi Gupta,
and Andrea Petri. “Do Dark Matter Halos Explain Lensing Peaks?” Physical Review
D. American Physical Society, 2016. https://doi.org/10.1103/physrevd.94.083506.
ieee: J. M. Zorrilla Matilla, Z. Haiman, D. Hsu, A. Gupta, and A. Petri, “Do dark
matter halos explain lensing peaks?,” Physical Review D, vol. 94, no. 8.
American Physical Society, 2016.
ista: Zorrilla Matilla JM, Haiman Z, Hsu D, Gupta A, Petri A. 2016. Do dark matter
halos explain lensing peaks? Physical Review D. 94(8), 083506.
mla: Zorrilla Matilla, José Manuel, et al. “Do Dark Matter Halos Explain Lensing
Peaks?” Physical Review D, vol. 94, no. 8, 083506, American Physical Society,
2016, doi:10.1103/physrevd.94.083506.
short: J.M. Zorrilla Matilla, Z. Haiman, D. Hsu, A. Gupta, A. Petri, Physical Review
D 94 (2016).
date_created: 2024-09-06T07:44:28Z
date_published: 2016-10-04T00:00:00Z
date_updated: 2024-09-25T07:49:17Z
day: '04'
doi: 10.1103/physrevd.94.083506
extern: '1'
external_id:
arxiv:
- '1609.03973'
intvolume: ' 94'
issue: '8'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.1609.03973'
month: '10'
oa: 1
oa_version: Preprint
publication: Physical Review D
publication_identifier:
issn:
- 2470-0010
- 2470-0029
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Do dark matter halos explain lensing peaks?
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 94
year: '2016'
...
---
_id: '17669'
abstract:
- lang: eng
text: 'Unprecedentedly precise cosmic microwave background (CMB) data are expected
from ongoing and near-future CMB Stage-III and IV surveys, which will yield reconstructed
CMB lensing maps with effective resolution approaching several arcminutes. The
small-scale CMB lensing fluctuations receive non-negligible contributions from
nonlinear structure in the late-time density field. These fluctuations are not
fully characterized by traditional two-point statistics, such as the power spectrum.
Here, we use N-body ray-tracing simulations of CMB lensing maps to examine two
higher-order statistics: the lensing convergence one-point probability distribution
function (PDF) and peak counts. We show that these statistics contain significant
information not captured by the two-point function, and provide specific forecasts
for the ongoing Stage-III Advanced Atacama Cosmology Telescope (AdvACT) experiment.
Considering only the temperature-based reconstruction estimator, we forecast 9σ
(PDF) and 6σ (peaks) detections of these statistics with AdvACT. Our simulation
pipeline fully accounts for the non-Gaussianity of the lensing reconstruction
noise, which is significant and cannot be neglected. Combining the power spectrum,
PDF, and peak counts for AdvACT will tighten cosmological constraints in the Ωm-σ8
plane by ≈30%, compared to using the power spectrum alone.'
article_number: '103501'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jia
full_name: Liu, Jia
last_name: Liu
- first_name: J. Colin
full_name: Hill, J. Colin
last_name: Hill
- first_name: Blake D.
full_name: Sherwin, Blake D.
last_name: Sherwin
- first_name: Andrea
full_name: Petri, Andrea
last_name: Petri
- first_name: Vanessa
full_name: Böhm, Vanessa
last_name: Böhm
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Liu J, Hill JC, Sherwin BD, Petri A, Böhm V, Haiman Z. CMB lensing beyond
the power spectrum: Cosmological constraints from the one-point probability distribution
function and peak counts. Physical Review D. 2016;94(10). doi:10.1103/physrevd.94.103501'
apa: 'Liu, J., Hill, J. C., Sherwin, B. D., Petri, A., Böhm, V., & Haiman, Z.
(2016). CMB lensing beyond the power spectrum: Cosmological constraints from the
one-point probability distribution function and peak counts. Physical Review
D. American Physical Society. https://doi.org/10.1103/physrevd.94.103501'
chicago: 'Liu, Jia, J. Colin Hill, Blake D. Sherwin, Andrea Petri, Vanessa Böhm,
and Zoltán Haiman. “CMB Lensing beyond the Power Spectrum: Cosmological Constraints
from the One-Point Probability Distribution Function and Peak Counts.” Physical
Review D. American Physical Society, 2016. https://doi.org/10.1103/physrevd.94.103501.'
ieee: 'J. Liu, J. C. Hill, B. D. Sherwin, A. Petri, V. Böhm, and Z. Haiman, “CMB
lensing beyond the power spectrum: Cosmological constraints from the one-point
probability distribution function and peak counts,” Physical Review D,
vol. 94, no. 10. American Physical Society, 2016.'
ista: 'Liu J, Hill JC, Sherwin BD, Petri A, Böhm V, Haiman Z. 2016. CMB lensing
beyond the power spectrum: Cosmological constraints from the one-point probability
distribution function and peak counts. Physical Review D. 94(10), 103501.'
mla: 'Liu, Jia, et al. “CMB Lensing beyond the Power Spectrum: Cosmological Constraints
from the One-Point Probability Distribution Function and Peak Counts.” Physical
Review D, vol. 94, no. 10, 103501, American Physical Society, 2016, doi:10.1103/physrevd.94.103501.'
short: J. Liu, J.C. Hill, B.D. Sherwin, A. Petri, V. Böhm, Z. Haiman, Physical Review
D 94 (2016).
date_created: 2024-09-06T07:47:04Z
date_published: 2016-11-02T00:00:00Z
date_updated: 2024-09-25T08:01:19Z
day: '02'
doi: 10.1103/physrevd.94.103501
extern: '1'
external_id:
arxiv:
- '1608.03169'
intvolume: ' 94'
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.1608.03169'
month: '11'
oa: 1
oa_version: Preprint
publication: Physical Review D
publication_identifier:
issn:
- 2470-0010
- 2470-0029
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'CMB lensing beyond the power spectrum: Cosmological constraints from the one-point
probability distribution function and peak counts'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 94
year: '2016'
...
---
_id: '17672'
abstract:
- lang: eng
text: Supermassive black hole binaries (SMBHBs) at sub-parsec separations should
be common in galactic nuclei, as a result of frequent galaxy mergers. Hydrodynamical
simulations of circum-binary discs predict strong periodic modulation of the mass
accretion rate on time-scales comparable to the orbital period of the binary.
As a result, SMBHBs may be recognized by the periodic modulation of their brightness.
We conducted a statistical search for periodic variability in a sample of 35 383
spectroscopically confirmed quasars in the photometric data base of the Palomar
Transient Factory (PTF). We analysed Lomb–Scargle periodograms and assessed the
significance of our findings by modelling each individual quasar's variability
as a damped random walk (DRW). We identified 50 quasars with significant periodicity
beyond the DRW model, typically with short periods of a few hundred days. We find
33 of these to remain significant after a re-analysis of their periodograms including
additional optical data from the intermediate-PTF and the Catalina Real-Time Transient
Survey. Assuming that the observed periods correspond to the redshifted orbital
periods of SMBHBs, we conclude that our findings are consistent with a population
of unequal-mass SMBHBs, with a typical mass ratio as low as q ≡ M2/M1 ≈ 0.01.
article_processing_charge: No
article_type: original
author:
- first_name: M.
full_name: Charisi, M.
last_name: Charisi
- first_name: I.
full_name: Bartos, I.
last_name: Bartos
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: A. M.
full_name: Price-Whelan, A. M.
last_name: Price-Whelan
- first_name: M. J.
full_name: Graham, M. J.
last_name: Graham
- first_name: E. C.
full_name: Bellm, E. C.
last_name: Bellm
- first_name: R. R.
full_name: Laher, R. R.
last_name: Laher
- first_name: S.
full_name: Márka, S.
last_name: Márka
citation:
ama: Charisi M, Bartos I, Haiman Z, et al. A population of short-period variable
quasars from PTF as supermassive black hole binary candidates. Monthly Notices
of the Royal Astronomical Society. 2016;463(2):2145-2171. doi:10.1093/mnras/stw1838
apa: Charisi, M., Bartos, I., Haiman, Z., Price-Whelan, A. M., Graham, M. J., Bellm,
E. C., … Márka, S. (2016). A population of short-period variable quasars from
PTF as supermassive black hole binary candidates. Monthly Notices of the Royal
Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stw1838
chicago: Charisi, M., I. Bartos, Zoltán Haiman, A. M. Price-Whelan, M. J. Graham,
E. C. Bellm, R. R. Laher, and S. Márka. “A Population of Short-Period Variable
Quasars from PTF as Supermassive Black Hole Binary Candidates.” Monthly Notices
of the Royal Astronomical Society. Oxford University Press, 2016. https://doi.org/10.1093/mnras/stw1838.
ieee: M. Charisi et al., “A population of short-period variable quasars from
PTF as supermassive black hole binary candidates,” Monthly Notices of the Royal
Astronomical Society, vol. 463, no. 2. Oxford University Press, pp. 2145–2171,
2016.
ista: Charisi M, Bartos I, Haiman Z, Price-Whelan AM, Graham MJ, Bellm EC, Laher
RR, Márka S. 2016. A population of short-period variable quasars from PTF as supermassive
black hole binary candidates. Monthly Notices of the Royal Astronomical Society.
463(2), 2145–2171.
mla: Charisi, M., et al. “A Population of Short-Period Variable Quasars from PTF
as Supermassive Black Hole Binary Candidates.” Monthly Notices of the Royal
Astronomical Society, vol. 463, no. 2, Oxford University Press, 2016, pp.
2145–71, doi:10.1093/mnras/stw1838.
short: M. Charisi, I. Bartos, Z. Haiman, A.M. Price-Whelan, M.J. Graham, E.C. Bellm,
R.R. Laher, S. Márka, Monthly Notices of the Royal Astronomical Society 463 (2016)
2145–2171.
date_created: 2024-09-06T07:49:15Z
date_published: 2016-07-28T00:00:00Z
date_updated: 2024-09-25T08:28:42Z
day: '28'
doi: 10.1093/mnras/stw1838
extern: '1'
intvolume: ' 463'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw1838
month: '07'
oa: 1
oa_version: Published Version
page: 2145-2171
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: A population of short-period variable quasars from PTF as supermassive black
hole binary candidates
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 463
year: '2016'
...
---
_id: '17693'
abstract:
- lang: eng
text: We perform one-dimensional radiation hydrodynamical simulations to solve accretion
flows onto massive black holes (BHs) with a very high rate. Assuming that photon
trapping limits the luminosity emerging from the central region to L≲LEdd, Inayoshi,
Haiman & Ostriker (2016) have shown that an accretion flow settles to a "hyper-Eddington"
solution, with a steady and isothermal (T≃8000 K) Bondi profile reaching ≳5000
times the Eddington accretion rate M˙Edd≡LEdd/c2. Here we address the possibility
that gas accreting with finite angular momentum forms a bright nuclear accretion
disc, with a luminosity exceeding the Eddington limit (1≲L/LEdd≲100). Combining
our simulations with an analytic model, we find that a transition to steady hyper-Eddington
accretion still occurs, as long as the luminosity remains below L/LEdd≲35 (MBH/10^4
M⊙)^3/2(n∞/10^5 cm^−3)(T∞/10^4 K)^−3/2(r⋆/10^14 cm)^−1/2, where n∞ and T∞ are
the density and temperature of the ambient gas, and r⋆ is the radius of the photosphere,
at which radiation emerges. If the luminosity exceeds this value, accretion becomes
episodic. Our results can be accurately recovered in a toy model of an optically
thick spherical shell, driven by radiation force into a collapsing medium. When
the central source is dimmer than the above critical value, the expansion of the
shell is halted and reversed by ram pressure of the collapsing medium, and by
shell's weight. Our results imply that rapid, unimpeded hyper-Eddington accretion
is possible even if the luminosity of the central source far exceeds the Eddington
limit, and can be either steady or strongly episodic.
article_processing_charge: No
article_type: original
author:
- first_name: Yuya
full_name: Sakurai, Yuya
last_name: Sakurai
- first_name: Kohei
full_name: Inayoshi, Kohei
last_name: Inayoshi
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Sakurai Y, Inayoshi K, Haiman Z. Hyper-Eddington mass accretion on to a black
hole with super-Eddington luminosity. Monthly Notices of the Royal Astronomical
Society. 2016;461(4):4496-4504. doi:10.1093/mnras/stw1652
apa: Sakurai, Y., Inayoshi, K., & Haiman, Z. (2016). Hyper-Eddington mass accretion
on to a black hole with super-Eddington luminosity. Monthly Notices of the
Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stw1652
chicago: Sakurai, Yuya, Kohei Inayoshi, and Zoltán Haiman. “Hyper-Eddington Mass
Accretion on to a Black Hole with Super-Eddington Luminosity.” Monthly Notices
of the Royal Astronomical Society. Oxford University Press, 2016. https://doi.org/10.1093/mnras/stw1652.
ieee: Y. Sakurai, K. Inayoshi, and Z. Haiman, “Hyper-Eddington mass accretion on
to a black hole with super-Eddington luminosity,” Monthly Notices of the Royal
Astronomical Society, vol. 461, no. 4. Oxford University Press, pp. 4496–4504,
2016.
ista: Sakurai Y, Inayoshi K, Haiman Z. 2016. Hyper-Eddington mass accretion on to
a black hole with super-Eddington luminosity. Monthly Notices of the Royal Astronomical
Society. 461(4), 4496–4504.
mla: Sakurai, Yuya, et al. “Hyper-Eddington Mass Accretion on to a Black Hole with
Super-Eddington Luminosity.” Monthly Notices of the Royal Astronomical Society,
vol. 461, no. 4, Oxford University Press, 2016, pp. 4496–504, doi:10.1093/mnras/stw1652.
short: Y. Sakurai, K. Inayoshi, Z. Haiman, Monthly Notices of the Royal Astronomical
Society 461 (2016) 4496–4504.
date_created: 2024-09-06T08:39:53Z
date_published: 2016-07-08T00:00:00Z
date_updated: 2024-09-25T10:02:57Z
day: '08'
doi: 10.1093/mnras/stw1652
extern: '1'
intvolume: ' 461'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw1652
month: '07'
oa: 1
oa_version: Published Version
page: 4496-4504
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Hyper-Eddington mass accretion on to a black hole with super-Eddington luminosity
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 461
year: '2016'
...
---
_id: '17699'
abstract:
- lang: eng
text: 'We quantify the presence of Ly\alpha\ damping wing absorption from a partially-neutral
intergalactic medium (IGM) in the spectrum of the z=7.08 QSO, ULASJ1120+0641.
Using a Bayesian framework, we simultaneously account for uncertainties in: (i)
the intrinsic QSO emission spectrum; and (ii) the distribution of cosmic HI patches
during the epoch of reionisation (EoR). For (i) we use a new intrinsic Ly\alpha\
emission line reconstruction method (Greig et al.), sampling a covariance matrix
of emission line properties built from a large database of moderate-z QSOs. For
(ii), we use the Evolution of 21-cm Structure (EOS; Mesinger et al.) simulations,
which span a range of physically-motivated EoR models. We find strong evidence
for the presence of damping wing absorption redward of Ly\alpha\ (where there
is no contamination from the Ly\alpha\ forest). Our analysis implies that the
EoR is not yet complete by z=7.1, with the volume-weighted IGM neutral fraction
constrained to x¯HI=0.40+0.21−0.19 at 1σ (x¯HI=0.40+0.41−0.32 at 2σ). This result
is insensitive to the EoR morphology. Our detection of significant neutral HI
in the IGM at z=7.1 is consistent with the latest Planck 2016 measurements of
the CMB Thompson scattering optical depth (Planck Collaboration XLVII).'
article_number: stw3351
article_processing_charge: No
article_type: original
author:
- first_name: Bradley
full_name: Greig, Bradley
last_name: Greig
- first_name: Andrei
full_name: Mesinger, Andrei
last_name: Mesinger
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Robert A.
full_name: Simcoe, Robert A.
last_name: Simcoe
citation:
ama: Greig B, Mesinger A, Haiman Z, Simcoe RA. Are we witnessing the epoch of reionization
at z=7.1 from the spectrum of J1120+0641? Monthly Notices of the Royal Astronomical
Society. 2016. doi:10.1093/mnras/stw3351
apa: Greig, B., Mesinger, A., Haiman, Z., & Simcoe, R. A. (2016). Are we witnessing
the epoch of reionization at z=7.1 from the spectrum of J1120+0641? Monthly
Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stw3351
chicago: Greig, Bradley, Andrei Mesinger, Zoltán Haiman, and Robert A. Simcoe. “Are
We Witnessing the Epoch of Reionization at Z=7.1 from the Spectrum of J1120+0641?”
Monthly Notices of the Royal Astronomical Society. Oxford University Press,
2016. https://doi.org/10.1093/mnras/stw3351.
ieee: B. Greig, A. Mesinger, Z. Haiman, and R. A. Simcoe, “Are we witnessing the
epoch of reionization at z=7.1 from the spectrum of J1120+0641?,” Monthly Notices
of the Royal Astronomical Society. Oxford University Press, 2016.
ista: Greig B, Mesinger A, Haiman Z, Simcoe RA. 2016. Are we witnessing the epoch
of reionization at z=7.1 from the spectrum of J1120+0641? Monthly Notices of the
Royal Astronomical Society., stw3351.
mla: Greig, Bradley, et al. “Are We Witnessing the Epoch of Reionization at Z=7.1
from the Spectrum of J1120+0641?” Monthly Notices of the Royal Astronomical
Society, stw3351, Oxford University Press, 2016, doi:10.1093/mnras/stw3351.
short: B. Greig, A. Mesinger, Z. Haiman, R.A. Simcoe, Monthly Notices of the Royal
Astronomical Society (2016).
date_created: 2024-09-06T08:45:10Z
date_published: 2016-12-24T00:00:00Z
date_updated: 2024-09-25T11:19:08Z
day: '24'
doi: 10.1093/mnras/stw3351
extern: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw3351
month: '12'
oa: 1
oa_version: Published Version
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Are we witnessing the epoch of reionization at z=7.1 from the spectrum of J1120+0641?
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2016'
...
---
_id: '17700'
abstract:
- lang: eng
text: We report the formation of intermediate-mass black holes (IMBHs) in suites
of numerical N-body simulations of Population III remnant black holes (BHs) embedded
in gas-rich protogalaxies at redshifts z≳10. We model the effects of gas drag
on the BHs' orbits, and allow BHs to grow via gas accretion, including a mode
of hyper-Eddington accretion in which photon trapping and rapid gas inflow suppress
any negative radiative feedback. Most initial BH configurations lead to the formation
of one (but never more than one) IMBH in the center of the protogalaxy, reaching
a mass of 10^3−5M⊙ through hyper-Eddington growth. Our results suggest a viable
pathway to forming the earliest massive BHs in the centers of early galaxies.
We also find that the nuclear IMBH typically captures a stellar-mass BH companion,
making these systems observable in gravitational waves as extreme mass-ratio inspirals
(EMRIs) with eLISA.
article_processing_charge: No
article_type: original
author:
- first_name: Taeho
full_name: Ryu, Taeho
last_name: Ryu
- first_name: Takamitsu L.
full_name: Tanaka, Takamitsu L.
last_name: Tanaka
- first_name: Rosalba
full_name: Perna, Rosalba
last_name: Perna
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Ryu T, Tanaka TL, Perna R, Haiman Z. Intermediate-mass black holes from Population
III remnants in the first galactic nuclei. Monthly Notices of the Royal Astronomical
Society. 2016;460(4):4122-4134. doi:10.1093/mnras/stw1241
apa: Ryu, T., Tanaka, T. L., Perna, R., & Haiman, Z. (2016). Intermediate-mass
black holes from Population III remnants in the first galactic nuclei. Monthly
Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stw1241
chicago: Ryu, Taeho, Takamitsu L. Tanaka, Rosalba Perna, and Zoltán Haiman. “Intermediate-Mass
Black Holes from Population III Remnants in the First Galactic Nuclei.” Monthly
Notices of the Royal Astronomical Society. Oxford University Press, 2016.
https://doi.org/10.1093/mnras/stw1241.
ieee: T. Ryu, T. L. Tanaka, R. Perna, and Z. Haiman, “Intermediate-mass black holes
from Population III remnants in the first galactic nuclei,” Monthly Notices
of the Royal Astronomical Society, vol. 460, no. 4. Oxford University Press,
pp. 4122–4134, 2016.
ista: Ryu T, Tanaka TL, Perna R, Haiman Z. 2016. Intermediate-mass black holes from
Population III remnants in the first galactic nuclei. Monthly Notices of the Royal
Astronomical Society. 460(4), 4122–4134.
mla: Ryu, Taeho, et al. “Intermediate-Mass Black Holes from Population III Remnants
in the First Galactic Nuclei.” Monthly Notices of the Royal Astronomical Society,
vol. 460, no. 4, Oxford University Press, 2016, pp. 4122–34, doi:10.1093/mnras/stw1241.
short: T. Ryu, T.L. Tanaka, R. Perna, Z. Haiman, Monthly Notices of the Royal Astronomical
Society 460 (2016) 4122–4134.
date_created: 2024-09-06T08:46:28Z
date_published: 2016-05-24T00:00:00Z
date_updated: 2024-09-25T11:22:16Z
day: '24'
doi: 10.1093/mnras/stw1241
extern: '1'
intvolume: ' 460'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw1241
month: '05'
oa: 1
oa_version: Published Version
page: 4122-4134
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Intermediate-mass black holes from Population III remnants in the first galactic
nuclei
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 460
year: '2016'
...
---
_id: '17709'
abstract:
- lang: eng
text: 'We study very-high rate spherically symmetric accretion flows onto a massive
black hole (BH; 10^2 < M_BH < 10^6 Msun) embedded in a dense gas cloud with a
low abundance of metals, performing one-dimensional hydrodynamical simulations
which include multi-frequency radiation transfer and non-equilibrium primordial
chemistry. We find that rapid gas supply from the Bondi radius at a hyper-Eddington
rate can occur without being impeded by radiation feedback when (n/10^5 cm^-3)
> (M_BH/10^4Msun)^{-1}(T/10^4 K)^{3/2}, where n and T are the density and temperature
of ambient gas outside of the Bondi radius. The resulting accretion rate in this
regime is steady, and larger than 3000 times the Eddington rate. At lower Bondi
rates, the accretion is episodic due to radiative feedback and the average rate
is limited below the Eddington rate. For the hyper-Eddington case, the steady
solution consists of two parts: a radiation-dominated central core, where photon
trapping due to electron scattering is important, and an accreting envelope which
follows a Bondi profile with T~8000 K. When the emergent luminosity is limited
below the Eddington luminosity because of photon trapping, radiation from the
central region does not affect the gas dynamics at larger scales. We apply our
result to the rapid formation of massive BHs in protogalaxies with a virial temperature
of T_vir> 10^4 K. Once a seed BH forms at the center of the galaxy, it can grow
up to a maximum ~10^5 (T_vir/10^4 K) Msun via gas accretion independent of the
initial BH mass. Finally, we discuss possible observational signatures of rapidly
accreting BHs with/without allowance for dust. We suggest that these systems could
explain Lya emitters without X-rays and luminous infrared sources with hot dust
emission, respectively.'
article_processing_charge: No
article_type: original
author:
- first_name: Kohei
full_name: Inayoshi, Kohei
last_name: Inayoshi
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Jeremiah P.
full_name: Ostriker, Jeremiah P.
last_name: Ostriker
citation:
ama: Inayoshi K, Haiman Z, Ostriker JP. Hyper-Eddington accretion flows on to massive
black holes. Monthly Notices of the Royal Astronomical Society. 2016;459(4):3738-3755.
doi:10.1093/mnras/stw836
apa: Inayoshi, K., Haiman, Z., & Ostriker, J. P. (2016). Hyper-Eddington accretion
flows on to massive black holes. Monthly Notices of the Royal Astronomical
Society. Oxford University Press. https://doi.org/10.1093/mnras/stw836
chicago: Inayoshi, Kohei, Zoltán Haiman, and Jeremiah P. Ostriker. “Hyper-Eddington
Accretion Flows on to Massive Black Holes.” Monthly Notices of the Royal Astronomical
Society. Oxford University Press, 2016. https://doi.org/10.1093/mnras/stw836.
ieee: K. Inayoshi, Z. Haiman, and J. P. Ostriker, “Hyper-Eddington accretion flows
on to massive black holes,” Monthly Notices of the Royal Astronomical Society,
vol. 459, no. 4. Oxford University Press, pp. 3738–3755, 2016.
ista: Inayoshi K, Haiman Z, Ostriker JP. 2016. Hyper-Eddington accretion flows on
to massive black holes. Monthly Notices of the Royal Astronomical Society. 459(4),
3738–3755.
mla: Inayoshi, Kohei, et al. “Hyper-Eddington Accretion Flows on to Massive Black
Holes.” Monthly Notices of the Royal Astronomical Society, vol. 459, no.
4, Oxford University Press, 2016, pp. 3738–55, doi:10.1093/mnras/stw836.
short: K. Inayoshi, Z. Haiman, J.P. Ostriker, Monthly Notices of the Royal Astronomical
Society 459 (2016) 3738–3755.
date_created: 2024-09-06T08:54:12Z
date_published: 2016-04-12T00:00:00Z
date_updated: 2024-09-25T12:00:22Z
day: '12'
doi: 10.1093/mnras/stw836
extern: '1'
intvolume: ' 459'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw836
month: '04'
oa: 1
oa_version: Published Version
page: 3738-3755
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Hyper-Eddington accretion flows on to massive black holes
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 459
year: '2016'
...
---
_id: '1794'
abstract:
- lang: eng
text: We consider Conditional random fields (CRFs) with pattern-based potentials
defined on a chain. In this model the energy of a string (labeling) (Formula presented.)
is the sum of terms over intervals [i, j] where each term is non-zero only if
the substring (Formula presented.) equals a prespecified pattern w. Such CRFs
can be naturally applied to many sequence tagging problems. We present efficient
algorithms for the three standard inference tasks in a CRF, namely computing (i)
the partition function, (ii) marginals, and (iii) computing the MAP. Their complexities
are respectively (Formula presented.), (Formula presented.) and (Formula presented.)
where L is the combined length of input patterns, (Formula presented.) is the
maximum length of a pattern, and D is the input alphabet. This improves on the
previous algorithms of Ye et al. (NIPS, 2009) whose complexities are respectively
(Formula presented.), (Formula presented.) and (Formula presented.), where (Formula
presented.) is the number of input patterns. In addition, we give an efficient
algorithm for sampling, and revisit the case of MAP with non-positive weights.
acknowledgement: This work has been partially supported by the European Research Council
under the European Unions Seventh Framework Programme (FP7/2007-2013)/ERC grant
agreement no. 616160.
article_processing_charge: No
arxiv: 1
author:
- first_name: Vladimir
full_name: Kolmogorov, Vladimir
id: 3D50B0BA-F248-11E8-B48F-1D18A9856A87
last_name: Kolmogorov
- first_name: Rustem
full_name: Takhanov, Rustem
id: 2CCAC26C-F248-11E8-B48F-1D18A9856A87
last_name: Takhanov
citation:
ama: Kolmogorov V, Takhanov R. Inference algorithms for pattern-based CRFs on sequence
data. Algorithmica. 2016;76(1):17-46. doi:10.1007/s00453-015-0017-7
apa: Kolmogorov, V., & Takhanov, R. (2016). Inference algorithms for pattern-based
CRFs on sequence data. Algorithmica. Springer. https://doi.org/10.1007/s00453-015-0017-7
chicago: Kolmogorov, Vladimir, and Rustem Takhanov. “Inference Algorithms for Pattern-Based
CRFs on Sequence Data.” Algorithmica. Springer, 2016. https://doi.org/10.1007/s00453-015-0017-7.
ieee: V. Kolmogorov and R. Takhanov, “Inference algorithms for pattern-based CRFs
on sequence data,” Algorithmica, vol. 76, no. 1. Springer, pp. 17–46, 2016.
ista: Kolmogorov V, Takhanov R. 2016. Inference algorithms for pattern-based CRFs
on sequence data. Algorithmica. 76(1), 17–46.
mla: Kolmogorov, Vladimir, and Rustem Takhanov. “Inference Algorithms for Pattern-Based
CRFs on Sequence Data.” Algorithmica, vol. 76, no. 1, Springer, 2016, pp.
17–46, doi:10.1007/s00453-015-0017-7.
short: V. Kolmogorov, R. Takhanov, Algorithmica 76 (2016) 17–46.
corr_author: '1'
date_created: 2018-12-11T11:54:02Z
date_published: 2016-09-01T00:00:00Z
date_updated: 2025-09-29T14:28:47Z
day: '01'
department:
- _id: VlKo
doi: 10.1007/s00453-015-0017-7
ec_funded: 1
external_id:
arxiv:
- '1210.0508'
isi:
- '000381149500002'
intvolume: ' 76'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1210.0508
month: '09'
oa: 1
oa_version: Preprint
page: 17 - 46
project:
- _id: 25FBA906-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '616160'
name: 'Discrete Optimization in Computer Vision: Theory and Practice'
publication: Algorithmica
publication_status: published
publisher: Springer
publist_id: '5316'
quality_controlled: '1'
related_material:
record:
- id: '2272'
relation: earlier_version
status: public
scopus_import: '1'
status: public
title: Inference algorithms for pattern-based CRFs on sequence data
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 76
year: '2016'
...
---
OA_type: closed access
_id: '17952'
abstract:
- lang: eng
text: 'The stability of chemical bonds can be studied experimentally by rupturing
single molecule junctions under applied voltage. Here, we compare voltage-induced
bond rupture in two Si–Si backbones: one has no alternate conductive pathway whereas
the other contains an additional naphthyl pathway in parallel to the Si–Si bond.
We show that in contrast to the first system, the second can conduct through the
naphthyl group when the Si–Si bond is ruptured using an applied voltage. We investigate
this voltage induced Si–Si bond rupture by ab initio density functional theory
calculations and molecular dynamics simulations that ultimately demonstrate that
the excitation of molecular vibrational modes by tunneling electrons leads to
homolytic Si–Si bond rupture.'
article_processing_charge: No
article_type: original
author:
- first_name: Haixing
full_name: Li, Haixing
last_name: Li
- first_name: Nathaniel T.
full_name: Kim, Nathaniel T.
last_name: Kim
- first_name: Timothy A.
full_name: Su, Timothy A.
last_name: Su
- first_name: Michael L.
full_name: Steigerwald, Michael L.
last_name: Steigerwald
- first_name: Colin
full_name: Nuckolls, Colin
last_name: Nuckolls
- first_name: Pierre
full_name: Darancet, Pierre
last_name: Darancet
- first_name: James L.
full_name: Leighton, James L.
last_name: Leighton
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
citation:
ama: Li H, Kim NT, Su TA, et al. Mechanism for Si–Si bond rupture in single molecule
junctions. Journal of the American Chemical Society. 2016;138(49):16159-16164.
doi:10.1021/jacs.6b10700
apa: Li, H., Kim, N. T., Su, T. A., Steigerwald, M. L., Nuckolls, C., Darancet,
P., … Venkataraman, L. (2016). Mechanism for Si–Si bond rupture in single molecule
junctions. Journal of the American Chemical Society. American Chemical
Society. https://doi.org/10.1021/jacs.6b10700
chicago: Li, Haixing, Nathaniel T. Kim, Timothy A. Su, Michael L. Steigerwald, Colin
Nuckolls, Pierre Darancet, James L. Leighton, and Latha Venkataraman. “Mechanism
for Si–Si Bond Rupture in Single Molecule Junctions.” Journal of the American
Chemical Society. American Chemical Society, 2016. https://doi.org/10.1021/jacs.6b10700.
ieee: H. Li et al., “Mechanism for Si–Si bond rupture in single molecule
junctions,” Journal of the American Chemical Society, vol. 138, no. 49.
American Chemical Society, pp. 16159–16164, 2016.
ista: Li H, Kim NT, Su TA, Steigerwald ML, Nuckolls C, Darancet P, Leighton JL,
Venkataraman L. 2016. Mechanism for Si–Si bond rupture in single molecule junctions.
Journal of the American Chemical Society. 138(49), 16159–16164.
mla: Li, Haixing, et al. “Mechanism for Si–Si Bond Rupture in Single Molecule Junctions.”
Journal of the American Chemical Society, vol. 138, no. 49, American Chemical
Society, 2016, pp. 16159–64, doi:10.1021/jacs.6b10700.
short: H. Li, N.T. Kim, T.A. Su, M.L. Steigerwald, C. Nuckolls, P. Darancet, J.L.
Leighton, L. Venkataraman, Journal of the American Chemical Society 138 (2016)
16159–16164.
date_created: 2024-09-09T09:19:46Z
date_published: 2016-11-18T00:00:00Z
date_updated: 2024-12-18T08:36:48Z
day: '18'
doi: 10.1021/jacs.6b10700
extern: '1'
external_id:
pmid:
- '27960303'
intvolume: ' 138'
issue: '49'
language:
- iso: eng
month: '11'
oa_version: None
page: 16159-16164
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Mechanism for Si–Si bond rupture in single molecule junctions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 138
year: '2016'
...
---
OA_type: closed access
_id: '17954'
abstract:
- lang: eng
text: Guidelines to predict trends in the electrical conductance of molecules have
been developed for the π-system of conjugated systems. Little is known, however,
about the conductance of the underlying σ-systems because the π-system usually
dominates the transport. Here we study a family of bipyridine-based molecules
using STM-break junction experiments and density functional theory transport calculations.
We use different lengths and substitution patterns to probe the role of both the
σ-system and the π-system in controlling conductance. By exploiting the destructive
interference feature found in the π-system of the meta-coupled six-membered aromatic
rings, we show that the conductance of the σ-system of a meta-coupled molecule
can be probed directly and can even exceed that of its para-coupled analog. These
results add to the understanding of the conductance through the chemically hidden
σ-electrons.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Anders
full_name: Borges, Anders
last_name: Borges
- first_name: E-Dean
full_name: Fung, E-Dean
last_name: Fung
- first_name: Fay
full_name: Ng, Fay
last_name: Ng
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
- first_name: Gemma C.
full_name: Solomon, Gemma C.
last_name: Solomon
citation:
ama: Borges A, Fung E-D, Ng F, Venkataraman L, Solomon GC. Probing the conductance
of the σ-system of bipyridine using destructive interference. The Journal of
Physical Chemistry Letters. 2016;7(23):4825-4829. doi:10.1021/acs.jpclett.6b02494
apa: Borges, A., Fung, E.-D., Ng, F., Venkataraman, L., & Solomon, G. C. (2016).
Probing the conductance of the σ-system of bipyridine using destructive interference.
The Journal of Physical Chemistry Letters. American Chemical Society. https://doi.org/10.1021/acs.jpclett.6b02494
chicago: Borges, Anders, E-Dean Fung, Fay Ng, Latha Venkataraman, and Gemma C. Solomon.
“Probing the Conductance of the σ-System of Bipyridine Using Destructive Interference.”
The Journal of Physical Chemistry Letters. American Chemical Society, 2016.
https://doi.org/10.1021/acs.jpclett.6b02494.
ieee: A. Borges, E.-D. Fung, F. Ng, L. Venkataraman, and G. C. Solomon, “Probing
the conductance of the σ-system of bipyridine using destructive interference,”
The Journal of Physical Chemistry Letters, vol. 7, no. 23. American Chemical
Society, pp. 4825–4829, 2016.
ista: Borges A, Fung E-D, Ng F, Venkataraman L, Solomon GC. 2016. Probing the conductance
of the σ-system of bipyridine using destructive interference. The Journal of Physical
Chemistry Letters. 7(23), 4825–4829.
mla: Borges, Anders, et al. “Probing the Conductance of the σ-System of Bipyridine
Using Destructive Interference.” The Journal of Physical Chemistry Letters,
vol. 7, no. 23, American Chemical Society, 2016, pp. 4825–29, doi:10.1021/acs.jpclett.6b02494.
short: A. Borges, E.-D. Fung, F. Ng, L. Venkataraman, G.C. Solomon, The Journal
of Physical Chemistry Letters 7 (2016) 4825–4829.
date_created: 2024-09-09T09:22:48Z
date_published: 2016-11-10T00:00:00Z
date_updated: 2024-12-18T08:47:29Z
day: '10'
doi: 10.1021/acs.jpclett.6b02494
extern: '1'
external_id:
pmid:
- '27934052'
intvolume: ' 7'
issue: '23'
language:
- iso: eng
month: '11'
oa_version: None
page: 4825-4829
pmid: 1
publication: The Journal of Physical Chemistry Letters
publication_identifier:
eissn:
- 1948-7185
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Probing the conductance of the σ-system of bipyridine using destructive interference
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 7
year: '2016'
...
---
OA_place: publisher
OA_type: hybrid
_id: '17955'
abstract:
- lang: eng
text: The development of molecular components functioning as switches, rectifiers
or amplifiers is a great challenge in molecular electronics. A desirable property
of such components is functional robustness, meaning that the intrinsic functionality
of components must be preserved regardless of the strategy used to integrate them
into the final assemblies. Here, this issue is investigated for molecular diodes
based on N-phenylbenzamide (NPBA) backbones. The transport properties of molecular
junctions derived from NPBA are characterized while varying the nature of the
functional groups interfacing the backbone and the gold electrodes required for
break-junction measurements. Combining experimental and theoretical methods, it
is shown that at low bias (<0.85 V) transport is determined by the same frontier
molecular orbital originating from the NPBA core, regardless of the anchoring
group employed. The magnitude of rectification, however, is strongly dependent
on the strength of the electronic coupling at the gold–NPBA interface and on the
spatial distribution of the local density of states of the dominant transport
channel of the molecular junction.
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Matthieu
full_name: Koepf, Matthieu
last_name: Koepf
- first_name: Christopher
full_name: Koenigsmann, Christopher
last_name: Koenigsmann
- first_name: Wendu
full_name: Ding, Wendu
last_name: Ding
- first_name: Arunbah
full_name: Batra, Arunbah
last_name: Batra
- first_name: Christian F. A.
full_name: Negre, Christian F. A.
last_name: Negre
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
- first_name: Gary W.
full_name: Brudvig, Gary W.
last_name: Brudvig
- first_name: Victor S.
full_name: Batista, Victor S.
last_name: Batista
- first_name: Charles A.
full_name: Schmuttenmaer, Charles A.
last_name: Schmuttenmaer
- first_name: Robert H.
full_name: Crabtree, Robert H.
last_name: Crabtree
citation:
ama: Koepf M, Koenigsmann C, Ding W, et al. Controlling the rectification properties
of molecular junctions through molecule–electrode coupling. Nanoscale.
2016;8(36):16357-16362. doi:10.1039/c6nr04830g
apa: Koepf, M., Koenigsmann, C., Ding, W., Batra, A., Negre, C. F. A., Venkataraman,
L., … Crabtree, R. H. (2016). Controlling the rectification properties of molecular
junctions through molecule–electrode coupling. Nanoscale. Royal Society
of Chemistry. https://doi.org/10.1039/c6nr04830g
chicago: Koepf, Matthieu, Christopher Koenigsmann, Wendu Ding, Arunbah Batra, Christian
F. A. Negre, Latha Venkataraman, Gary W. Brudvig, Victor S. Batista, Charles A.
Schmuttenmaer, and Robert H. Crabtree. “Controlling the Rectification Properties
of Molecular Junctions through Molecule–Electrode Coupling.” Nanoscale.
Royal Society of Chemistry, 2016. https://doi.org/10.1039/c6nr04830g.
ieee: M. Koepf et al., “Controlling the rectification properties of molecular
junctions through molecule–electrode coupling,” Nanoscale, vol. 8, no.
36. Royal Society of Chemistry, pp. 16357–16362, 2016.
ista: Koepf M, Koenigsmann C, Ding W, Batra A, Negre CFA, Venkataraman L, Brudvig
GW, Batista VS, Schmuttenmaer CA, Crabtree RH. 2016. Controlling the rectification
properties of molecular junctions through molecule–electrode coupling. Nanoscale.
8(36), 16357–16362.
mla: Koepf, Matthieu, et al. “Controlling the Rectification Properties of Molecular
Junctions through Molecule–Electrode Coupling.” Nanoscale, vol. 8, no.
36, Royal Society of Chemistry, 2016, pp. 16357–62, doi:10.1039/c6nr04830g.
short: M. Koepf, C. Koenigsmann, W. Ding, A. Batra, C.F.A. Negre, L. Venkataraman,
G.W. Brudvig, V.S. Batista, C.A. Schmuttenmaer, R.H. Crabtree, Nanoscale 8 (2016)
16357–16362.
date_created: 2024-09-09T09:23:39Z
date_published: 2016-08-16T00:00:00Z
date_updated: 2024-12-18T08:50:22Z
day: '16'
doi: 10.1039/c6nr04830g
extern: '1'
intvolume: ' 8'
issue: '36'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc/3.0/
main_file_link:
- open_access: '1'
url: https://doi.org/10.1039/C6NR04830G
month: '08'
oa: 1
oa_version: Published Version
page: 16357-16362
publication: Nanoscale
publication_identifier:
eissn:
- 2040-3372
issn:
- 2040-3364
publication_status: published
publisher: Royal Society of Chemistry
quality_controlled: '1'
scopus_import: '1'
status: public
title: Controlling the rectification properties of molecular junctions through molecule–electrode
coupling
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/3.0/legalcode
name: Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0)
short: CC BY-NC (3.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2016'
...
---
OA_type: closed access
_id: '17956'
abstract:
- lang: eng
text: A highly conducting electronic contact between a strained disilane and Au
is demonstrated through scanning tunneling microscope-based single-molecule measurements.
Conformationally locked cis diastereomers of bis(sulfide)-anchor-equipped 1,2-disilaacenaphthenes
readily form high-conducting junctions in which the two sulfide anchors bind in
a bipodal fashion to one gold electrode, providing enough stability for a stable
electrical contact between the Si–Si σ bond and the other electrode.
article_processing_charge: No
article_type: original
author:
- first_name: Nathaniel T.
full_name: Kim, Nathaniel T.
last_name: Kim
- first_name: Haixing
full_name: Li, Haixing
last_name: Li
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
- first_name: James L.
full_name: Leighton, James L.
last_name: Leighton
citation:
ama: Kim NT, Li H, Venkataraman L, Leighton JL. High-conductance pathways in ring-strained
disilanes by qay of direct σ-Si–Si to Au coordination. Journal of the American
Chemical Society. 2016;138(36):11505-11508. doi:10.1021/jacs.6b07825
apa: Kim, N. T., Li, H., Venkataraman, L., & Leighton, J. L. (2016). High-conductance
pathways in ring-strained disilanes by qay of direct σ-Si–Si to Au coordination.
Journal of the American Chemical Society. American Chemical Society. https://doi.org/10.1021/jacs.6b07825
chicago: Kim, Nathaniel T., Haixing Li, Latha Venkataraman, and James L. Leighton.
“High-Conductance Pathways in Ring-Strained Disilanes by Qay of Direct σ-Si–Si
to Au Coordination.” Journal of the American Chemical Society. American
Chemical Society, 2016. https://doi.org/10.1021/jacs.6b07825.
ieee: N. T. Kim, H. Li, L. Venkataraman, and J. L. Leighton, “High-conductance pathways
in ring-strained disilanes by qay of direct σ-Si–Si to Au coordination,” Journal
of the American Chemical Society, vol. 138, no. 36. American Chemical Society,
pp. 11505–11508, 2016.
ista: Kim NT, Li H, Venkataraman L, Leighton JL. 2016. High-conductance pathways
in ring-strained disilanes by qay of direct σ-Si–Si to Au coordination. Journal
of the American Chemical Society. 138(36), 11505–11508.
mla: Kim, Nathaniel T., et al. “High-Conductance Pathways in Ring-Strained Disilanes
by Qay of Direct σ-Si–Si to Au Coordination.” Journal of the American Chemical
Society, vol. 138, no. 36, American Chemical Society, 2016, pp. 11505–08,
doi:10.1021/jacs.6b07825.
short: N.T. Kim, H. Li, L. Venkataraman, J.L. Leighton, Journal of the American
Chemical Society 138 (2016) 11505–11508.
date_created: 2024-09-09T09:25:25Z
date_published: 2016-08-26T00:00:00Z
date_updated: 2024-12-18T08:53:39Z
day: '26'
doi: 10.1021/jacs.6b07825
extern: '1'
external_id:
pmid:
- '27563932'
intvolume: ' 138'
issue: '36'
language:
- iso: eng
month: '08'
oa_version: None
page: 11505-11508
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: High-conductance pathways in ring-strained disilanes by qay of direct σ-Si–Si
to Au coordination
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 138
year: '2016'
...
---
OA_type: closed access
_id: '17957'
abstract:
- lang: eng
text: 'While the single-molecule conductance properties of π-conjugated and σ-conjugated
systems have been well-studied, little is known regarding the conductance properties
of mixed σ–π backbone wires and the factors that control their transport properties.
Here we utilize a scanning tunneling microscope-based break-junction technique
to study a series of molecular wires with π–σ–π backbone structures, where the
π-moiety is an electrode-binding thioanisole ring and the σ-moiety is a triatomic
α–β–α chain composed of C, Si, or Ge atoms. We find that the sequence and composition
of group 14 atoms in the α–β–α chain dictates whether electronic communication
between the aryl rings is enhanced or suppressed. Placing heavy atoms at the α-position
decreases conductance, whereas placing them at the β-position increases conductance:
for example, the C–Ge–C sequence is over 20 times more conductive than the Ge–C–Ge
sequence. Density functional theory calculations reveal that these conductance
trends arise from periodic trends (i.e., atomic size, polarizability, and electronegativity)
that differ from C to Si to Ge. The periodic trends that control molecular conductance
here are the same ones that give rise to the α and β silicon effects from physical
organic chemistry. These findings outline a new molecular design concept for tuning
conductance in single-molecule electrical devices.'
article_processing_charge: No
article_type: original
author:
- first_name: Timothy A.
full_name: Su, Timothy A.
last_name: Su
- first_name: Haixing
full_name: Li, Haixing
last_name: Li
- first_name: Rebekka S.
full_name: Klausen, Rebekka S.
last_name: Klausen
- first_name: Jonathan R.
full_name: Widawsky, Jonathan R.
last_name: Widawsky
- first_name: Arunabh
full_name: Batra, Arunabh
last_name: Batra
- first_name: Michael L.
full_name: Steigerwald, Michael L.
last_name: Steigerwald
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
- first_name: Colin
full_name: Nuckolls, Colin
last_name: Nuckolls
citation:
ama: Su TA, Li H, Klausen RS, et al. Tuning conductance in π–σ–π single-molecule
wires. Journal of the American Chemical Society. 2016;138(24):7791-7795.
doi:10.1021/jacs.6b04394
apa: Su, T. A., Li, H., Klausen, R. S., Widawsky, J. R., Batra, A., Steigerwald,
M. L., … Nuckolls, C. (2016). Tuning conductance in π–σ–π single-molecule wires.
Journal of the American Chemical Society. American Chemical Society. https://doi.org/10.1021/jacs.6b04394
chicago: Su, Timothy A., Haixing Li, Rebekka S. Klausen, Jonathan R. Widawsky, Arunabh
Batra, Michael L. Steigerwald, Latha Venkataraman, and Colin Nuckolls. “Tuning
Conductance in π–σ–π Single-Molecule Wires.” Journal of the American Chemical
Society. American Chemical Society, 2016. https://doi.org/10.1021/jacs.6b04394.
ieee: T. A. Su et al., “Tuning conductance in π–σ–π single-molecule wires,”
Journal of the American Chemical Society, vol. 138, no. 24. American Chemical
Society, pp. 7791–7795, 2016.
ista: Su TA, Li H, Klausen RS, Widawsky JR, Batra A, Steigerwald ML, Venkataraman
L, Nuckolls C. 2016. Tuning conductance in π–σ–π single-molecule wires. Journal
of the American Chemical Society. 138(24), 7791–7795.
mla: Su, Timothy A., et al. “Tuning Conductance in π–σ–π Single-Molecule Wires.”
Journal of the American Chemical Society, vol. 138, no. 24, American Chemical
Society, 2016, pp. 7791–95, doi:10.1021/jacs.6b04394.
short: T.A. Su, H. Li, R.S. Klausen, J.R. Widawsky, A. Batra, M.L. Steigerwald,
L. Venkataraman, C. Nuckolls, Journal of the American Chemical Society 138 (2016)
7791–7795.
date_created: 2024-09-09T09:26:50Z
date_published: 2016-06-14T00:00:00Z
date_updated: 2024-12-18T08:56:43Z
day: '14'
doi: 10.1021/jacs.6b04394
extern: '1'
external_id:
pmid:
- '27299173'
intvolume: ' 138'
issue: '24'
language:
- iso: eng
month: '06'
oa_version: None
page: 7791-7795
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Tuning conductance in π–σ–π single-molecule wires
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 138
year: '2016'
...
---
OA_type: closed access
_id: '17958'
abstract:
- lang: eng
text: 'Charge transport phenomena in single-molecule junctions are often dominated
by tunneling, with a transmission function dictating the probability that electrons
or holes tunnel through the junction. Here, we present a new and simple technique
for measuring the transmission functions of molecular junctions in the coherent
tunneling limit, over an energy range of 1.5 eV around the Fermi energy. We create
molecular junctions in an ionic environment with electrodes having different exposed
areas, which results in the formation of electric double layers of dissimilar
density on the two electrodes. This allows us to electrostatically shift the molecular
resonance relative to the junction Fermi levels in a manner that depends on the
sign of the applied bias, enabling us to map out the junction’s transmission function
and determine the dominant orbital for charge transport in the molecular junction.
We demonstrate this technique using two groups of molecules: one group having
molecular resonance energies relatively far from EF and one group having molecular
resonance energies within the accessible bias window. Our results compare well
with previous electrochemical gating data and with transmission functions computed
from first principles. Furthermore, with the second group of molecules, we are
able to examine the behavior of a molecular junction as a resonance shifts into
the bias window. This work provides a new, experimentally simple route for exploring
the fundamentals of charge transport at the nanoscale.'
article_processing_charge: No
article_type: letter_note
author:
- first_name: Brian
full_name: Capozzi, Brian
last_name: Capozzi
- first_name: Jonathan Z.
full_name: Low, Jonathan Z.
last_name: Low
- first_name: Jianlong
full_name: Xia, Jianlong
last_name: Xia
- first_name: Zhen-Fei
full_name: Liu, Zhen-Fei
last_name: Liu
- first_name: Jeffrey B.
full_name: Neaton, Jeffrey B.
last_name: Neaton
- first_name: Luis M.
full_name: Campos, Luis M.
last_name: Campos
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
citation:
ama: Capozzi B, Low JZ, Xia J, et al. Mapping the transmission functions of single-molecule
junctions. Nano Letters. 2016;16(6):3949-3954. doi:10.1021/acs.nanolett.6b01592
apa: Capozzi, B., Low, J. Z., Xia, J., Liu, Z.-F., Neaton, J. B., Campos, L. M.,
& Venkataraman, L. (2016). Mapping the transmission functions of single-molecule
junctions. Nano Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.6b01592
chicago: Capozzi, Brian, Jonathan Z. Low, Jianlong Xia, Zhen-Fei Liu, Jeffrey B.
Neaton, Luis M. Campos, and Latha Venkataraman. “Mapping the Transmission Functions
of Single-Molecule Junctions.” Nano Letters. American Chemical Society,
2016. https://doi.org/10.1021/acs.nanolett.6b01592.
ieee: B. Capozzi et al., “Mapping the transmission functions of single-molecule
junctions,” Nano Letters, vol. 16, no. 6. American Chemical Society, pp.
3949–3954, 2016.
ista: Capozzi B, Low JZ, Xia J, Liu Z-F, Neaton JB, Campos LM, Venkataraman L. 2016.
Mapping the transmission functions of single-molecule junctions. Nano Letters.
16(6), 3949–3954.
mla: Capozzi, Brian, et al. “Mapping the Transmission Functions of Single-Molecule
Junctions.” Nano Letters, vol. 16, no. 6, American Chemical Society, 2016,
pp. 3949–54, doi:10.1021/acs.nanolett.6b01592.
short: B. Capozzi, J.Z. Low, J. Xia, Z.-F. Liu, J.B. Neaton, L.M. Campos, L. Venkataraman,
Nano Letters 16 (2016) 3949–3954.
date_created: 2024-09-09T09:28:14Z
date_published: 2016-05-17T00:00:00Z
date_updated: 2024-12-18T09:06:14Z
day: '17'
doi: 10.1021/acs.nanolett.6b01592
extern: '1'
external_id:
pmid:
- '27186894'
intvolume: ' 16'
issue: '6'
language:
- iso: eng
month: '05'
oa_version: None
page: 3949-3954
pmid: 1
publication: Nano Letters
publication_identifier:
eissn:
- 1530-6992
issn:
- 1530-6984
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Mapping the transmission functions of single-molecule junctions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2016'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '17959'
abstract:
- lang: eng
text: Single-molecule conductance measurements have focused primarily on organic
molecular systems. Here, we carry out scanning tunneling microscope-based break-junction
measurements on a series of metal chalcogenide Co6Se8 clusters capped with conducting
ligands of varying lengths. We compare these measurements with those of individual
free ligands and find that the conductance of these clusters and the free ligands
have different decay constants with increasing ligand length. We also show, through
measurements in two different solvents, 1-bromonaphthalene and 1,2,4-trichlorobenzene,
that the conductance decay of the clusters depends on the solvent environment.
We discuss several mechanisms to explain our observations.
article_processing_charge: Yes
article_type: original
author:
- first_name: Bonnie
full_name: Choi, Bonnie
last_name: Choi
- first_name: Brian
full_name: Capozzi, Brian
last_name: Capozzi
- first_name: Seokhoon
full_name: Ahn, Seokhoon
last_name: Ahn
- first_name: Ari
full_name: Turkiewicz, Ari
last_name: Turkiewicz
- first_name: Giacomo
full_name: Lovat, Giacomo
last_name: Lovat
- first_name: Colin
full_name: Nuckolls, Colin
last_name: Nuckolls
- first_name: Michael L.
full_name: Steigerwald, Michael L.
last_name: Steigerwald
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
- first_name: Xavier
full_name: Roy, Xavier
last_name: Roy
citation:
ama: Choi B, Capozzi B, Ahn S, et al. Solvent-dependent conductance decay constants
in single cluster junctions. Chemical Science. 2016;7(4):2701-2705. doi:10.1039/c5sc02595h
apa: Choi, B., Capozzi, B., Ahn, S., Turkiewicz, A., Lovat, G., Nuckolls, C., …
Roy, X. (2016). Solvent-dependent conductance decay constants in single cluster
junctions. Chemical Science. Royal Society of Chemistry. https://doi.org/10.1039/c5sc02595h
chicago: Choi, Bonnie, Brian Capozzi, Seokhoon Ahn, Ari Turkiewicz, Giacomo Lovat,
Colin Nuckolls, Michael L. Steigerwald, Latha Venkataraman, and Xavier Roy. “Solvent-Dependent
Conductance Decay Constants in Single Cluster Junctions.” Chemical Science.
Royal Society of Chemistry, 2016. https://doi.org/10.1039/c5sc02595h.
ieee: B. Choi et al., “Solvent-dependent conductance decay constants in single
cluster junctions,” Chemical Science, vol. 7, no. 4. Royal Society of Chemistry,
pp. 2701–2705, 2016.
ista: Choi B, Capozzi B, Ahn S, Turkiewicz A, Lovat G, Nuckolls C, Steigerwald ML,
Venkataraman L, Roy X. 2016. Solvent-dependent conductance decay constants in
single cluster junctions. Chemical Science. 7(4), 2701–2705.
mla: Choi, Bonnie, et al. “Solvent-Dependent Conductance Decay Constants in Single
Cluster Junctions.” Chemical Science, vol. 7, no. 4, Royal Society of Chemistry,
2016, pp. 2701–05, doi:10.1039/c5sc02595h.
short: B. Choi, B. Capozzi, S. Ahn, A. Turkiewicz, G. Lovat, C. Nuckolls, M.L. Steigerwald,
L. Venkataraman, X. Roy, Chemical Science 7 (2016) 2701–2705.
date_created: 2024-09-09T09:30:45Z
date_published: 2016-01-11T00:00:00Z
date_updated: 2024-12-18T09:09:02Z
day: '11'
doi: 10.1039/c5sc02595h
extern: '1'
external_id:
pmid:
- '28660043'
intvolume: ' 7'
issue: '4'
language:
- iso: eng
month: '01'
oa_version: Published Version
page: 2701-2705
pmid: 1
publication: Chemical Science
publication_identifier:
eissn:
- 2041-6539
issn:
- 2041-6520
publication_status: published
publisher: Royal Society of Chemistry
quality_controlled: '1'
scopus_import: '1'
status: public
title: Solvent-dependent conductance decay constants in single cluster junctions
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/3.0/legalcode
name: Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0)
short: CC BY-NC (3.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 7
year: '2016'
...