The Astrophysical Journal. 2022;935(2). doi:10.3847/1538-4357/ac7daa'
apa: 'Hu, H., Inayoshi, K., Haiman, Z., Li, W., Quataert, E., & Kuiper, R. (2022).
Supercritical growth pathway to overmassive black holes at cosmic dawn: Coevolution
with massive quasar hosts. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.3847/1538-4357/ac7daa'
chicago: 'Hu, Haojie, Kohei Inayoshi, Zoltán Haiman, Wenxiu Li, Eliot Quataert,
and Rolf Kuiper. “Supercritical Growth Pathway to Overmassive Black Holes at Cosmic
Dawn: Coevolution with Massive Quasar Hosts.” The Astrophysical Journal.
American Astronomical Society, 2022. https://doi.org/10.3847/1538-4357/ac7daa.'
ieee: 'H. Hu, K. Inayoshi, Z. Haiman, W. Li, E. Quataert, and R. Kuiper, “Supercritical
growth pathway to overmassive black holes at cosmic dawn: Coevolution with massive
quasar hosts,” The Astrophysical Journal, vol. 935, no. 2. American Astronomical
Society, 2022.'
ista: 'Hu H, Inayoshi K, Haiman Z, Li W, Quataert E, Kuiper R. 2022. Supercritical
growth pathway to overmassive black holes at cosmic dawn: Coevolution with massive
quasar hosts. The Astrophysical Journal. 935(2), 140.'
mla: 'Hu, Haojie, et al. “Supercritical Growth Pathway to Overmassive Black Holes
at Cosmic Dawn: Coevolution with Massive Quasar Hosts.” The Astrophysical Journal,
vol. 935, no. 2, 140, American Astronomical Society, 2022, doi:10.3847/1538-4357/ac7daa.'
short: H. Hu, K. Inayoshi, Z. Haiman, W. Li, E. Quataert, R. Kuiper, The Astrophysical
Journal 935 (2022).
date_created: 2024-09-05T12:00:42Z
date_published: 2022-08-23T00:00:00Z
date_updated: 2024-09-18T12:31:26Z
day: '23'
doi: 10.3847/1538-4357/ac7daa
extern: '1'
intvolume: ' 935'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3847/1538-4357/ac7daa
month: '08'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Supercritical growth pathway to overmassive black holes at cosmic dawn: Coevolution
with massive quasar hosts'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 935
year: '2022'
...
---
_id: '17561'
abstract:
- lang: eng
text: Active galactic nuclei (AGNs) can funnel stars and stellar remnants from the
vicinity of the galactic center into the inner plane of the AGN disk. Stars reaching
this inner region can be tidally disrupted by the stellar-mass black holes in
the disk. Such micro tidal disruption events (micro-TDEs) could be a useful probe
of stellar interaction with the AGN disk. We find that micro-TDEs in AGNs occur
at a rate of ∼170 Gpc−3 yr−1. Their cleanest observational probe may be the electromagnetic
detection of tidal disruption in AGNs by heavy supermassive black holes (M• ≳
108 M⊙) that cannot tidally disrupt solar-type stars. The reconstructed rate of
such events from observations, nonetheless, appears to be much lower than our
estimated micro-TDE rate. We discuss two such micro-TDE candidates observed to
date (ASASSN-15lh and ZTF19aailpwl).
article_number: L28
article_processing_charge: No
article_type: original
author:
- first_name: Y.
full_name: Yang, Y.
last_name: Yang
- first_name: I.
full_name: Bartos, I.
last_name: Bartos
- first_name: G.
full_name: Fragione, G.
last_name: Fragione
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: M.
full_name: Kowalski, M.
last_name: Kowalski
- first_name: S.
full_name: Márka, S.
last_name: Márka
- first_name: R.
full_name: Perna, R.
last_name: Perna
- first_name: H.
full_name: Tagawa, H.
last_name: Tagawa
citation:
ama: Yang Y, Bartos I, Fragione G, et al. Tidal disruption on stellar-mass black
holes in active galactic nuclei. The Astrophysical Journal Letters. 2022;933(2).
doi:10.3847/2041-8213/ac7c0b
apa: Yang, Y., Bartos, I., Fragione, G., Haiman, Z., Kowalski, M., Márka, S., …
Tagawa, H. (2022). Tidal disruption on stellar-mass black holes in active galactic
nuclei. The Astrophysical Journal Letters. American Astronomical Society.
https://doi.org/10.3847/2041-8213/ac7c0b
chicago: Yang, Y., I. Bartos, G. Fragione, Zoltán Haiman, M. Kowalski, S. Márka,
R. Perna, and H. Tagawa. “Tidal Disruption on Stellar-Mass Black Holes in Active
Galactic Nuclei.” The Astrophysical Journal Letters. American Astronomical
Society, 2022. https://doi.org/10.3847/2041-8213/ac7c0b.
ieee: Y. Yang et al., “Tidal disruption on stellar-mass black holes in active
galactic nuclei,” The Astrophysical Journal Letters, vol. 933, no. 2. American
Astronomical Society, 2022.
ista: Yang Y, Bartos I, Fragione G, Haiman Z, Kowalski M, Márka S, Perna R, Tagawa
H. 2022. Tidal disruption on stellar-mass black holes in active galactic nuclei.
The Astrophysical Journal Letters. 933(2), L28.
mla: Yang, Y., et al. “Tidal Disruption on Stellar-Mass Black Holes in Active Galactic
Nuclei.” The Astrophysical Journal Letters, vol. 933, no. 2, L28, American
Astronomical Society, 2022, doi:10.3847/2041-8213/ac7c0b.
short: Y. Yang, I. Bartos, G. Fragione, Z. Haiman, M. Kowalski, S. Márka, R. Perna,
H. Tagawa, The Astrophysical Journal Letters 933 (2022).
date_created: 2024-09-05T12:01:54Z
date_published: 2022-07-07T00:00:00Z
date_updated: 2024-09-18T12:38:14Z
day: '07'
doi: 10.3847/2041-8213/ac7c0b
extern: '1'
intvolume: ' 933'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3847/2041-8213/ac7c0b
month: '07'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal Letters
publication_identifier:
issn:
- 2041-8205
- 2041-8213
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Tidal disruption on stellar-mass black holes in active galactic nuclei
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 933
year: '2022'
...
---
_id: '17562'
abstract:
- lang: eng
text: Ongoing and planned weak lensing (WL) surveys are becoming deep enough to
contain information on angular scales down to a few arcmin. To fully extract information
from these small scales, we must capture non-Gaussian features in the cosmological
WL signal while accurately accounting for baryonic effects. In this work, we account
for baryonic physics via a baryonic correction model that modifies the matter
distribution in dark matter-only N-body simulations, mimicking the effects of
galaxy formation and feedback. We implement this model in a large suite of ray-tracing
simulations, spanning a grid of cosmological models in Ωm−σ8 space. We then develop
a convolutional neural network (CNN) architecture to learn and constrain cosmological
and baryonic parameters simultaneously from the simulated WL convergence maps.
We find that in a Hyper-Suprime Cam-like survey, our CNN achieves a 1.7× tighter
constraint in Ωm−σ8 space (1σ area) than the power spectrum and 2.1× tighter than
the peak counts, showing that the CNN can efficiently extract non-Gaussian cosmological
information even while marginalizing over baryonic effects. When we combine our
CNN with the power spectrum, the baryonic effects degrade the constraint in Ωm−σ8
space by a factor of 2.4, compared to the much worse degradation by a factor of
4.7 or 3.7 from either method alone.
article_processing_charge: No
article_type: original
author:
- first_name: Tianhuan
full_name: Lu, Tianhuan
last_name: Lu
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: José Manuel
full_name: Zorrilla Matilla, José Manuel
last_name: Zorrilla Matilla
citation:
ama: Lu T, Haiman Z, Zorrilla Matilla JM. Simultaneously constraining cosmology
and baryonic physics via deep learning from weak lensing. Monthly Notices of
the Royal Astronomical Society. 2022;511(1):1518-1528. doi:10.1093/mnras/stac161
apa: Lu, T., Haiman, Z., & Zorrilla Matilla, J. M. (2022). Simultaneously constraining
cosmology and baryonic physics via deep learning from weak lensing. Monthly
Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stac161
chicago: Lu, Tianhuan, Zoltán Haiman, and José Manuel Zorrilla Matilla. “Simultaneously
Constraining Cosmology and Baryonic Physics via Deep Learning from Weak Lensing.”
Monthly Notices of the Royal Astronomical Society. Oxford University Press,
2022. https://doi.org/10.1093/mnras/stac161.
ieee: T. Lu, Z. Haiman, and J. M. Zorrilla Matilla, “Simultaneously constraining
cosmology and baryonic physics via deep learning from weak lensing,” Monthly
Notices of the Royal Astronomical Society, vol. 511, no. 1. Oxford University
Press, pp. 1518–1528, 2022.
ista: Lu T, Haiman Z, Zorrilla Matilla JM. 2022. Simultaneously constraining cosmology
and baryonic physics via deep learning from weak lensing. Monthly Notices of the
Royal Astronomical Society. 511(1), 1518–1528.
mla: Lu, Tianhuan, et al. “Simultaneously Constraining Cosmology and Baryonic Physics
via Deep Learning from Weak Lensing.” Monthly Notices of the Royal Astronomical
Society, vol. 511, no. 1, Oxford University Press, 2022, pp. 1518–28, doi:10.1093/mnras/stac161.
short: T. Lu, Z. Haiman, J.M. Zorrilla Matilla, Monthly Notices of the Royal Astronomical
Society 511 (2022) 1518–1528.
date_created: 2024-09-05T12:02:56Z
date_published: 2022-01-28T00:00:00Z
date_updated: 2024-09-18T12:41:52Z
day: '28'
doi: 10.1093/mnras/stac161
extern: '1'
intvolume: ' 511'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stac161
month: '01'
oa: 1
oa_version: Published Version
page: 1518-1528
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: Simultaneously constraining cosmology and baryonic physics via deep learning
from weak lensing
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 511
year: '2022'
...
---
_id: '17563'
abstract:
- lang: eng
text: "In order to extract full cosmological information from next-generation large
and high-precision weak lensing (WL) surveys (e.g., Euclid, Roman, and LSST),
higher-order statistics that probe the small-scale, nonlinear regime of large-scale
structure (LSS) need to be utilized. WL peak counts, which trace overdensities
in the cosmic web, are one promising and simple statistic for constraining cosmological
parameters. The physical origin of WL peaks have previously been linked to dark
matter halos along the line of sight, and this peak-halo connection has been used
to develop various semianalytic halo-based models for predicting peak counts.
Here, we study the origin of WL peaks and the effectiveness of halo-based models
for WL peak counts using a suite of ray-tracing N-body simulations. We compare
WL peaks in convergence maps from the full simulations to those in maps created
from only particles associated with halos—the latter playing the role of a “perfect”
halo model. We find that, while halo-only contributions are able to replicate
peak counts qualitatively well, halos do not explain all WL peaks. Halos particularly
underpredict negative peaks, which are associated with local overdensities in
large-scale underdense regions along the line of sight. In addition, neglecting
nonhalo contributions to peaks counts leads to a significant bias on the parameters
(Ωm, \U0001D70E8) for surveys larger than ⪆100 deg2. We conclude that other elements
of the cosmic web, outside and far away from dark matter halos, need to be incorporated
into models of WL peaks in order to infer unbiased cosmological constraints."
article_number: '023505'
article_processing_charge: No
article_type: original
author:
- first_name: Alina
full_name: Sabyr, Alina
last_name: Sabyr
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: José Manuel Zorrilla
full_name: Matilla, José Manuel Zorrilla
last_name: Matilla
- first_name: Tianhuan
full_name: Lu, Tianhuan
last_name: Lu
citation:
ama: 'Sabyr A, Haiman Z, Matilla JMZ, Lu T. Cosmological constraints from weak lensing
peaks: Can halo models accurately predict peak counts? Physical Review D.
2022;105(2). doi:10.1103/physrevd.105.023505'
apa: 'Sabyr, A., Haiman, Z., Matilla, J. M. Z., & Lu, T. (2022). Cosmological
constraints from weak lensing peaks: Can halo models accurately predict peak counts?
Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.105.023505'
chicago: 'Sabyr, Alina, Zoltán Haiman, José Manuel Zorrilla Matilla, and Tianhuan
Lu. “Cosmological Constraints from Weak Lensing Peaks: Can Halo Models Accurately
Predict Peak Counts?” Physical Review D. American Physical Society, 2022.
https://doi.org/10.1103/physrevd.105.023505.'
ieee: 'A. Sabyr, Z. Haiman, J. M. Z. Matilla, and T. Lu, “Cosmological constraints
from weak lensing peaks: Can halo models accurately predict peak counts?,” Physical
Review D, vol. 105, no. 2. American Physical Society, 2022.'
ista: 'Sabyr A, Haiman Z, Matilla JMZ, Lu T. 2022. Cosmological constraints from
weak lensing peaks: Can halo models accurately predict peak counts? Physical Review
D. 105(2), 023505.'
mla: 'Sabyr, Alina, et al. “Cosmological Constraints from Weak Lensing Peaks: Can
Halo Models Accurately Predict Peak Counts?” Physical Review D, vol. 105,
no. 2, 023505, American Physical Society, 2022, doi:10.1103/physrevd.105.023505.'
short: A. Sabyr, Z. Haiman, J.M.Z. Matilla, T. Lu, Physical Review D 105 (2022).
date_created: 2024-09-05T12:03:46Z
date_published: 2022-01-07T00:00:00Z
date_updated: 2024-09-18T12:52:58Z
day: '07'
doi: 10.1103/physrevd.105.023505
extern: '1'
intvolume: ' 105'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1103/PhysRevD.105.023505
month: '01'
oa: 1
oa_version: Published Version
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: 'Cosmological constraints from weak lensing peaks: Can halo models accurately
predict peak counts?'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 105
year: '2022'
...
---
_id: '17568'
abstract:
- lang: eng
text: Stellar-mass BHs (sBHs) are predicted to be embedded in active galactic nuclei
(AGN) disks due to gravitational drag and in-situ star formation. However, we
find that due to a high gas density in an AGN disk environment, compact objects
may rapidly grow to intermediate-mass BHs and deplete matter from the AGN disk
unless accretion is suppressed by some feedback process(es). These consequences
are inconsistent with AGN observations and the dynamics of the Galactic center.
Here we consider mechanical feedback mechanisms for the reduction of gas accretion.
Rapidly accreting sBHs launch winds and/or jets via the Blandford-Znajek mechanism,
which produce high-pressure shocks and cocoons. Such a shock and cocoon can spread
laterally in the plane of the disk, eject the outer regions of a circum-sBH disk
(CsBD) and puncture a hole in the AGN disk with horizontal size comparable to
the disk scale-height. Since the depletion timescale of the bound CsBD is much
shorter than the resupply timescale of gas to the sBH, the time-averaged accretion
rate onto sBHs is reduced by this process by a factor of ∼10--100. This feedback
mechanism can therefore help alleviate the sBH over-growth and AGN-disk depletion
problems. On the other hand, we find that cocoons of jets can unbind a large fraction
of the gas accreting in the disks of less massive SMBHs, which may help explain
the dearth of high-Eddington ratio AGNs with SMBH mass ≲105M⊙.
article_number: '41'
article_processing_charge: No
article_type: original
author:
- first_name: Hiromichi
full_name: Tagawa, Hiromichi
last_name: Tagawa
- first_name: Shigeo S.
full_name: Kimura, Shigeo S.
last_name: Kimura
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Rosalba
full_name: Perna, Rosalba
last_name: Perna
- first_name: Hidekazu
full_name: Tanaka, Hidekazu
last_name: Tanaka
- first_name: Imre
full_name: Bartos, Imre
last_name: Bartos
citation:
ama: Tagawa H, Kimura SS, Haiman Z, Perna R, Tanaka H, Bartos I. Can stellar-mass
black hole growth disrupt disks of active galactic nuclei? The role of mechanical
feedback. The Astrophysical Journal. 2022;927(1). doi:10.3847/1538-4357/ac45f8
apa: Tagawa, H., Kimura, S. S., Haiman, Z., Perna, R., Tanaka, H., & Bartos,
I. (2022). Can stellar-mass black hole growth disrupt disks of active galactic
nuclei? The role of mechanical feedback. The Astrophysical Journal. American
Astronomical Society. https://doi.org/10.3847/1538-4357/ac45f8
chicago: Tagawa, Hiromichi, Shigeo S. Kimura, Zoltán Haiman, Rosalba Perna, Hidekazu
Tanaka, and Imre Bartos. “Can Stellar-Mass Black Hole Growth Disrupt Disks of
Active Galactic Nuclei? The Role of Mechanical Feedback.” The Astrophysical
Journal. American Astronomical Society, 2022. https://doi.org/10.3847/1538-4357/ac45f8.
ieee: H. Tagawa, S. S. Kimura, Z. Haiman, R. Perna, H. Tanaka, and I. Bartos, “Can
stellar-mass black hole growth disrupt disks of active galactic nuclei? The role
of mechanical feedback,” The Astrophysical Journal, vol. 927, no. 1. American
Astronomical Society, 2022.
ista: Tagawa H, Kimura SS, Haiman Z, Perna R, Tanaka H, Bartos I. 2022. Can stellar-mass
black hole growth disrupt disks of active galactic nuclei? The role of mechanical
feedback. The Astrophysical Journal. 927(1), 41.
mla: Tagawa, Hiromichi, et al. “Can Stellar-Mass Black Hole Growth Disrupt Disks
of Active Galactic Nuclei? The Role of Mechanical Feedback.” The Astrophysical
Journal, vol. 927, no. 1, 41, American Astronomical Society, 2022, doi:10.3847/1538-4357/ac45f8.
short: H. Tagawa, S.S. Kimura, Z. Haiman, R. Perna, H. Tanaka, I. Bartos, The Astrophysical
Journal 927 (2022).
date_created: 2024-09-05T12:13:22Z
date_published: 2022-03-03T00:00:00Z
date_updated: 2024-09-18T14:57:06Z
day: '03'
doi: 10.3847/1538-4357/ac45f8
extern: '1'
intvolume: ' 927'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3847/1538-4357/ac45f8
month: '03'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Can stellar-mass black hole growth disrupt disks of active galactic nuclei?
The role of mechanical feedback
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 927
year: '2022'
...
---
_id: '17571'
abstract:
- lang: eng
text: 'The existence of 109 M⊙ supermassive black holes (SMBHs) within the first
billion years of the Universe remains a puzzle in our conventional understanding
of black hole formation and growth. Several suggested formation pathways for these
SMBHs lead to a heavy seed, with an initial black hole mass of 104–106 M⊙. This
can lead to an overly massive BH galaxy (OMBG), whose nuclear black hole’s mass
is comparable to or even greater than the surrounding stellar mass: the black
hole to stellar mass ratio is Mbh/M* ≫ 10−3, well in excess of the typical values
at lower redshift. We investigate how long these newborn BHs remain outliers in
the Mbh − M* relation, by exploring the subsequent evolution of two OMBGs previously
identified in the Renaissance simulations. We find that both OMBGs have Mbh/M*
> 1 during their entire life, from their birth at z ≈ 15 until they merge
with much more massive haloes at z ≈ 8. We find that the OMBGs are spatially resolvable
from their more massive, 1011 M⊙, neighbouring haloes until their mergers are
complete at z ≈ 8. This affords a window for future observations with JWST and
sensitive X-ray telescopes to diagnose the heavy-seed scenario, by detecting similar
OMBGs and establishing their uniquely high black hole-to-stellar mass ratio.'
article_processing_charge: No
article_type: original
author:
- first_name: Matthew T
full_name: Scoggins, Matthew T
last_name: Scoggins
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: John H
full_name: Wise, John H
last_name: Wise
citation:
ama: Scoggins MT, Haiman Z, Wise JH. How long do high redshift massive black hole
seeds remain outliers in black hole versus host galaxy relations? Monthly Notices
of the Royal Astronomical Society. 2022;519(2):2155-2168. doi:10.1093/mnras/stac3715
apa: Scoggins, M. T., Haiman, Z., & Wise, J. H. (2022). How long do high redshift
massive black hole seeds remain outliers in black hole versus host galaxy relations?
Monthly Notices of the Royal Astronomical Society. Oxford University Press.
https://doi.org/10.1093/mnras/stac3715
chicago: Scoggins, Matthew T, Zoltán Haiman, and John H Wise. “How Long Do High
Redshift Massive Black Hole Seeds Remain Outliers in Black Hole versus Host Galaxy
Relations?” Monthly Notices of the Royal Astronomical Society. Oxford University
Press, 2022. https://doi.org/10.1093/mnras/stac3715.
ieee: M. T. Scoggins, Z. Haiman, and J. H. Wise, “How long do high redshift massive
black hole seeds remain outliers in black hole versus host galaxy relations?,”
Monthly Notices of the Royal Astronomical Society, vol. 519, no. 2. Oxford
University Press, pp. 2155–2168, 2022.
ista: Scoggins MT, Haiman Z, Wise JH. 2022. How long do high redshift massive black
hole seeds remain outliers in black hole versus host galaxy relations? Monthly
Notices of the Royal Astronomical Society. 519(2), 2155–2168.
mla: Scoggins, Matthew T., et al. “How Long Do High Redshift Massive Black Hole
Seeds Remain Outliers in Black Hole versus Host Galaxy Relations?” Monthly
Notices of the Royal Astronomical Society, vol. 519, no. 2, Oxford University
Press, 2022, pp. 2155–68, doi:10.1093/mnras/stac3715.
short: M.T. Scoggins, Z. Haiman, J.H. Wise, Monthly Notices of the Royal Astronomical
Society 519 (2022) 2155–2168.
date_created: 2024-09-05T12:14:22Z
date_published: 2022-12-20T00:00:00Z
date_updated: 2024-09-19T07:18:22Z
day: '20'
doi: 10.1093/mnras/stac3715
extern: '1'
intvolume: ' 519'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stac3715
month: '12'
oa: 1
oa_version: Published Version
page: 2155-2168
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: How long do high redshift massive black hole seeds remain outliers in black
hole versus host galaxy relations?
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 519
year: '2022'
...
---
_id: '17572'
abstract:
- lang: eng
text: The LIGO–Virgo–KAGRA Collaboration recently detected gravitational waves (GWs)
from the merger of black hole–neutron star (BHNS) binary systems GW200105 and
GW200115. No coincident electromagnetic (EM) counterparts were detected. While
the mass ratio and BH spin in both systems were not sufficient to tidally disrupt
the NS outside the BH event horizon, other, magnetospheric mechanisms for EM emission
exist in this regime and depend sensitively on the NS magnetic field strength.
Combining GW measurements with EM flux upper limits, we place upper limits on
the NS surface magnetic field strength above which magnetospheric emission models
would have generated an observable EM counterpart. We consider fireball models
powered by the black hole battery mechanism, where energy is output in gamma rays
over ≲1 s. Consistency with no detection by Fermi-GBM or INTEGRAL SPI-ACS constrains
the NS surface magnetic field to ≲1015 G. Hence, joint GW detection and EM upper
limits rule out the theoretical possibility that the NSs in GW200105 and GW200115,
and the putative NS in GW190814, retain dipolar magnetic fields ≳1015 G until
merger. They also rule out formation scenarios where strongly magnetized magnetars
quickly merge with BHs. We alternatively rule out operation of the BH-battery-powered
fireball mechanism in these systems. This is the first multimessenger constraint
on NS magnetic fields in BHNS systems and a novel approach to probe fields at
this point in NS evolution. This demonstrates the constraining power that multimessenger
analyses of BHNS mergers have on BHNS formation scenarios, NS magnetic field evolution,
and the physics of BHNS magnetospheric interactions.
article_number: '56'
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: Janna
full_name: Levin, Janna
last_name: Levin
- first_name: Johan
full_name: Samsing, Johan
last_name: Samsing
- first_name: Alejandro
full_name: Vigna-Gómez, Alejandro
last_name: Vigna-Gómez
citation:
ama: D’Orazio DJ, Haiman Z, Levin J, Samsing J, Vigna-Gómez A. Multimessenger constraints
on magnetic fields in merging black hole–neutron star binaries. The Astrophysical
Journal. 2022;927(1). doi:10.3847/1538-4357/ac4bdb
apa: D’Orazio, D. J., Haiman, Z., Levin, J., Samsing, J., & Vigna-Gómez, A.
(2022). Multimessenger constraints on magnetic fields in merging black hole–neutron
star binaries. The Astrophysical Journal. American Astronomical Society.
https://doi.org/10.3847/1538-4357/ac4bdb
chicago: D’Orazio, Daniel J., Zoltán Haiman, Janna Levin, Johan Samsing, and Alejandro
Vigna-Gómez. “Multimessenger Constraints on Magnetic Fields in Merging Black Hole–Neutron
Star Binaries.” The Astrophysical Journal. American Astronomical Society,
2022. https://doi.org/10.3847/1538-4357/ac4bdb.
ieee: D. J. D’Orazio, Z. Haiman, J. Levin, J. Samsing, and A. Vigna-Gómez, “Multimessenger
constraints on magnetic fields in merging black hole–neutron star binaries,” The
Astrophysical Journal, vol. 927, no. 1. American Astronomical Society, 2022.
ista: D’Orazio DJ, Haiman Z, Levin J, Samsing J, Vigna-Gómez A. 2022. Multimessenger
constraints on magnetic fields in merging black hole–neutron star binaries. The
Astrophysical Journal. 927(1), 56.
mla: D’Orazio, Daniel J., et al. “Multimessenger Constraints on Magnetic Fields
in Merging Black Hole–Neutron Star Binaries.” The Astrophysical Journal,
vol. 927, no. 1, 56, American Astronomical Society, 2022, doi:10.3847/1538-4357/ac4bdb.
short: D.J. D’Orazio, Z. Haiman, J. Levin, J. Samsing, A. Vigna-Gómez, The Astrophysical
Journal 927 (2022).
date_created: 2024-09-05T12:15:46Z
date_published: 2022-01-01T00:00:00Z
date_updated: 2024-09-19T07:25:13Z
doi: 10.3847/1538-4357/ac4bdb
extern: '1'
intvolume: ' 927'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3847/1538-4357/ac4bdb
month: '01'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Multimessenger constraints on magnetic fields in merging black hole–neutron
star binaries
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 927
year: '2022'
...
---
_id: '17576'
abstract:
- lang: eng
text: Ultra-high angular resolution in astronomy has always been an important vehicle
for making fundamental discoveries. Recent results in direct imaging of the vicinity
of the supermassive black hole in the nucleus of the radio galaxy M87 by the millimeter
VLBI system Event Horizon Telescope and various pioneering results of the Space
VLBI mission RadioAstron provided new momentum in high angular resolution astrophysics.
In both mentioned cases, the angular resolution reached the values of about 10–20
microarcseconds (0.05–0.1 nanoradian). Further developments towards at least an
order of magnitude “sharper” values, at the level of 1 microarcsecond are dictated
by the needs of advanced astrophysical studies. The paper emphasis that these
higher values can only be achieved by placing millimeter and submillimeter wavelength
interferometric systems in space. A concept of such the system, called Terahertz
Exploration and Zooming-in for Astrophysics, has been proposed in the framework
of the ESA Call for White Papers for the Voyage 2050 long term plan in 2019. In
the current paper we present new science objectives for such the concept based
on recent results in studies of active galactic nuclei and supermassive black
holes. We also discuss several approaches for addressing technological challenges
of creating a millimeter/sub-millimeter wavelength interferometric system in space.
In particular, we consider a novel configuration of a space-borne millimeter/sub-millimeter
antenna which might resolve several bottlenecks in creating large precise mechanical
structures. The paper also presents an overview of prospective space-qualified
technologies of low-noise analogue front-end instrumentation for millimeter/sub-millimeter
telescopes. Data handling and processing instrumentation is another key technological
component of a sub-millimeter Space VLBI system. Requirements and possible implementation
options for this instrumentation are described as an extrapolation of the current
state-of-the-art Earth-based VLBI data transport and processing instrumentation.
The paper also briefly discusses approaches to the interferometric baseline state
vector determination and synchronisation and heterodyning system. The technology-oriented
sections of the paper do not aim at presenting a complete set of technological
solutions for sub-millimeter (terahertz) space-borne interferometers. Rather,
in combination with the original ESA Voyage 2050 White Paper, it sharpens the
case for the next generation microarcsecond-level imaging instruments and provides
starting points for further in-depth technology trade-off studies.
article_processing_charge: No
article_type: original
author:
- first_name: Leonid I.
full_name: Gurvits, Leonid I.
last_name: Gurvits
- first_name: Zsolt
full_name: Paragi, Zsolt
last_name: Paragi
- first_name: Ricardo I.
full_name: Amils, Ricardo I.
last_name: Amils
- first_name: Ilse
full_name: van Bemmel, Ilse
last_name: van Bemmel
- first_name: Paul
full_name: Boven, Paul
last_name: Boven
- first_name: Viviana
full_name: Casasola, Viviana
last_name: Casasola
- first_name: John
full_name: Conway, John
last_name: Conway
- first_name: Jordy
full_name: Davelaar, Jordy
last_name: Davelaar
- first_name: M. Carmen
full_name: Díez-González, M. Carmen
last_name: Díez-González
- first_name: Heino
full_name: Falcke, Heino
last_name: Falcke
- first_name: Rob
full_name: Fender, Rob
last_name: Fender
- first_name: Sándor
full_name: Frey, Sándor
last_name: Frey
- first_name: Christian M.
full_name: Fromm, Christian M.
last_name: Fromm
- first_name: Juan D.
full_name: Gallego-Puyol, Juan D.
last_name: Gallego-Puyol
- first_name: Cristina
full_name: García-Miró, Cristina
last_name: García-Miró
- first_name: Michael A.
full_name: Garrett, Michael A.
last_name: Garrett
- first_name: Marcello
full_name: Giroletti, Marcello
last_name: Giroletti
- first_name: Ciriaco
full_name: Goddi, Ciriaco
last_name: Goddi
- first_name: José L.
full_name: Gómez, José L.
last_name: Gómez
- first_name: Jeffrey
full_name: van der Gucht, Jeffrey
last_name: van der Gucht
- first_name: José Carlos
full_name: Guirado, José Carlos
last_name: Guirado
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Frank
full_name: Helmich, Frank
last_name: Helmich
- first_name: Ben
full_name: Hudson, Ben
last_name: Hudson
- first_name: Elizabeth
full_name: Humphreys, Elizabeth
last_name: Humphreys
- first_name: Violette
full_name: Impellizzeri, Violette
last_name: Impellizzeri
- first_name: Michael
full_name: Janssen, Michael
last_name: Janssen
- first_name: Michael D.
full_name: Johnson, Michael D.
last_name: Johnson
- first_name: Yuri Y.
full_name: Kovalev, Yuri Y.
last_name: Kovalev
- first_name: Michael
full_name: Kramer, Michael
last_name: Kramer
- first_name: Michael
full_name: Lindqvist, Michael
last_name: Lindqvist
- first_name: Hendrik
full_name: Linz, Hendrik
last_name: Linz
- first_name: Elisabetta
full_name: Liuzzo, Elisabetta
last_name: Liuzzo
- first_name: Andrei P.
full_name: Lobanov, Andrei P.
last_name: Lobanov
- first_name: Isaac
full_name: López-Fernández, Isaac
last_name: López-Fernández
- first_name: Inmaculada
full_name: Malo-Gómez, Inmaculada
last_name: Malo-Gómez
- first_name: Kunal
full_name: Masania, Kunal
last_name: Masania
- first_name: Yosuke
full_name: Mizuno, Yosuke
last_name: Mizuno
- first_name: Alexander V.
full_name: Plavin, Alexander V.
last_name: Plavin
- first_name: Raj T.
full_name: Rajan, Raj T.
last_name: Rajan
- first_name: Luciano
full_name: Rezzolla, Luciano
last_name: Rezzolla
- first_name: Freek
full_name: Roelofs, Freek
last_name: Roelofs
- first_name: Eduardo
full_name: Ros, Eduardo
last_name: Ros
- first_name: Kazi L.J.
full_name: Rygl, Kazi L.J.
last_name: Rygl
- first_name: Tuomas
full_name: Savolainen, Tuomas
last_name: Savolainen
- first_name: Karl
full_name: Schuster, Karl
last_name: Schuster
- first_name: Tiziana
full_name: Venturi, Tiziana
last_name: Venturi
- first_name: Marjolein
full_name: Verkouter, Marjolein
last_name: Verkouter
- first_name: Pablo
full_name: de Vicente, Pablo
last_name: de Vicente
- first_name: Pieter N.A.M.
full_name: Visser, Pieter N.A.M.
last_name: Visser
- first_name: Martina C.
full_name: Wiedner, Martina C.
last_name: Wiedner
- first_name: Maciek
full_name: Wielgus, Maciek
last_name: Wielgus
- first_name: Kaj
full_name: Wiik, Kaj
last_name: Wiik
- first_name: J. Anton
full_name: Zensus, J. Anton
last_name: Zensus
citation:
ama: Gurvits LI, Paragi Z, Amils RI, et al. The science case and challenges of space-borne
sub-millimeter interferometry. Acta Astronautica. 2022;196:314-333. doi:10.1016/j.actaastro.2022.04.020
apa: Gurvits, L. I., Paragi, Z., Amils, R. I., van Bemmel, I., Boven, P., Casasola,
V., … Zensus, J. A. (2022). The science case and challenges of space-borne sub-millimeter
interferometry. Acta Astronautica. Elsevier BV. https://doi.org/10.1016/j.actaastro.2022.04.020
chicago: Gurvits, Leonid I., Zsolt Paragi, Ricardo I. Amils, Ilse van Bemmel, Paul
Boven, Viviana Casasola, John Conway, et al. “The Science Case and Challenges
of Space-Borne Sub-Millimeter Interferometry.” Acta Astronautica. Elsevier
BV, 2022. https://doi.org/10.1016/j.actaastro.2022.04.020.
ieee: L. I. Gurvits et al., “The science case and challenges of space-borne
sub-millimeter interferometry,” Acta Astronautica, vol. 196. Elsevier BV,
pp. 314–333, 2022.
ista: Gurvits LI, Paragi Z, Amils RI, van Bemmel I, Boven P, Casasola V, Conway
J, Davelaar J, Díez-González MC, Falcke H, Fender R, Frey S, Fromm CM, Gallego-Puyol
JD, García-Miró C, Garrett MA, Giroletti M, Goddi C, Gómez JL, van der Gucht J,
Guirado JC, Haiman Z, Helmich F, Hudson B, Humphreys E, Impellizzeri V, Janssen
M, Johnson MD, Kovalev YY, Kramer M, Lindqvist M, Linz H, Liuzzo E, Lobanov AP,
López-Fernández I, Malo-Gómez I, Masania K, Mizuno Y, Plavin AV, Rajan RT, Rezzolla
L, Roelofs F, Ros E, Rygl KLJ, Savolainen T, Schuster K, Venturi T, Verkouter
M, de Vicente P, Visser PNAM, Wiedner MC, Wielgus M, Wiik K, Zensus JA. 2022.
The science case and challenges of space-borne sub-millimeter interferometry.
Acta Astronautica. 196, 314–333.
mla: Gurvits, Leonid I., et al. “The Science Case and Challenges of Space-Borne
Sub-Millimeter Interferometry.” Acta Astronautica, vol. 196, Elsevier BV,
2022, pp. 314–33, doi:10.1016/j.actaastro.2022.04.020.
short: L.I. Gurvits, Z. Paragi, R.I. Amils, I. van Bemmel, P. Boven, V. Casasola,
J. Conway, J. Davelaar, M.C. Díez-González, H. Falcke, R. Fender, S. Frey, C.M.
Fromm, J.D. Gallego-Puyol, C. García-Miró, M.A. Garrett, M. Giroletti, C. Goddi,
J.L. Gómez, J. van der Gucht, J.C. Guirado, Z. Haiman, F. Helmich, B. Hudson,
E. Humphreys, V. Impellizzeri, M. Janssen, M.D. Johnson, Y.Y. Kovalev, M. Kramer,
M. Lindqvist, H. Linz, E. Liuzzo, A.P. Lobanov, I. López-Fernández, I. Malo-Gómez,
K. Masania, Y. Mizuno, A.V. Plavin, R.T. Rajan, L. Rezzolla, F. Roelofs, E. Ros,
K.L.J. Rygl, T. Savolainen, K. Schuster, T. Venturi, M. Verkouter, P. de Vicente,
P.N.A.M. Visser, M.C. Wiedner, M. Wielgus, K. Wiik, J.A. Zensus, Acta Astronautica
196 (2022) 314–333.
date_created: 2024-09-05T12:19:08Z
date_published: 2022-05-06T00:00:00Z
date_updated: 2024-09-19T08:01:42Z
day: '06'
doi: 10.1016/j.actaastro.2022.04.020
extern: '1'
intvolume: ' 196'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.actaastro.2022.04.020
month: '05'
oa: 1
oa_version: Published Version
page: 314-333
publication: Acta Astronautica
publication_identifier:
issn:
- 0094-5765
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
scopus_import: '1'
status: public
title: The science case and challenges of space-borne sub-millimeter interferometry
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 196
year: '2022'
...
---
_id: '17580'
abstract:
- lang: eng
text: We present a study of optically selected dual Active Galactic Nuclei (AGN)
with projected separations of 3–97 kpc. Using multiwavelength (MWL) information
(optical, X-ray, mid-IR), we characterized the intrinsic nuclear properties of
this sample and compared them with those of isolated systems. Among the 124 X-ray-detected
AGN candidates, 52 appear in pairs and 72 as single X-ray sources. Through MWL
analysis, we confirmed the presence of the AGN in >80 per cent of the detected
targets in pairs (42 out of 52). X-ray spectral analysis confirms the trend of
increasing AGN luminosity with decreasing separation, suggesting that mergers
may have contributed to triggering more luminous AGN. Through X-ray/mid-IR ratio
versus X-ray colours, we estimated a fraction of Compton-thin AGN (with 1022 cm−2
< NH < 1024 cm−2) of about 80 per cent, while about 16 per cent
are Compton-thick sources (with NH > 1024 cm−2). These fractions of obscured
sources are larger than those found in samples of isolated AGN, confirming that
pairs of AGN show higher obscuration. This trend is further confirmed by comparing
the de-reddened [O iii] emission with the observed X-ray luminosity. However,
the derived fraction of Compton-thick sources in this sample at the early stages
of merging is lower than that reported for late-merging dual-AGN samples. Comparing
NH from X-rays with that derived from E(B − V) from narrow-line regions, we found
that the absorbing material is likely to be associated with the torus or broad-line
regions. We also explored the X-ray detection efficiency of dual-AGN candidates,
finding that, when observed properly (at on-axis positions and with long exposures),
X-ray data represent a powerful way to confirm and investigate dual-AGN systems.
article_processing_charge: No
author:
- first_name: Alessandra
full_name: De Rosa, Alessandra
last_name: De Rosa
- first_name: Cristian
full_name: Vignali, Cristian
last_name: Vignali
- first_name: Paola
full_name: Severgnini, Paola
last_name: Severgnini
- first_name: Stefano
full_name: Bianchi, Stefano
last_name: Bianchi
- first_name: Tamara
full_name: Bogdanović, Tamara
last_name: Bogdanović
- first_name: Maria
full_name: Charisi, Maria
last_name: Charisi
- first_name: Matteo
full_name: Guainazzi, Matteo
last_name: Guainazzi
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: S
full_name: Komossa, S
last_name: Komossa
- first_name: Zsolt
full_name: Paragi, Zsolt
last_name: Paragi
- first_name: Miguel
full_name: Perez-Torres, Miguel
last_name: Perez-Torres
- first_name: Enrico
full_name: Piconcelli, Enrico
last_name: Piconcelli
- first_name: Lorenzo
full_name: Ducci, Lorenzo
last_name: Ducci
- first_name: Manali
full_name: Parvatikar, Manali
last_name: Parvatikar
- first_name: Roberto
full_name: Serafinelli, Roberto
last_name: Serafinelli
citation:
ama: De Rosa A, Vignali C, Severgnini P, et al. The X-ray view of optically selected
dual AGN. Monthly Notices of the Royal Astronomical Society. 2022;519(4):5149-5160.
doi:10.1093/mnras/stac3664
apa: De Rosa, A., Vignali, C., Severgnini, P., Bianchi, S., Bogdanović, T., Charisi,
M., … Serafinelli, R. (2022). The X-ray view of optically selected dual AGN. Monthly
Notices of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stac3664
chicago: De Rosa, Alessandra, Cristian Vignali, Paola Severgnini, Stefano Bianchi,
Tamara Bogdanović, Maria Charisi, Matteo Guainazzi, et al. “The X-Ray View of
Optically Selected Dual AGN.” Monthly Notices of the Royal Astronomical Society.
Oxford University Press, 2022. https://doi.org/10.1093/mnras/stac3664.
ieee: A. De Rosa et al., “The X-ray view of optically selected dual AGN,”
Monthly Notices of the Royal Astronomical Society, vol. 519, no. 4. Oxford
University Press, pp. 5149–5160, 2022.
ista: De Rosa A, Vignali C, Severgnini P, Bianchi S, Bogdanović T, Charisi M, Guainazzi
M, Haiman Z, Komossa S, Paragi Z, Perez-Torres M, Piconcelli E, Ducci L, Parvatikar
M, Serafinelli R. 2022. The X-ray view of optically selected dual AGN. Monthly
Notices of the Royal Astronomical Society. 519(4), 5149–5160.
mla: De Rosa, Alessandra, et al. “The X-Ray View of Optically Selected Dual AGN.”
Monthly Notices of the Royal Astronomical Society, vol. 519, no. 4, Oxford
University Press, 2022, pp. 5149–60, doi:10.1093/mnras/stac3664.
short: A. De Rosa, C. Vignali, P. Severgnini, S. Bianchi, T. Bogdanović, M. Charisi,
M. Guainazzi, Z. Haiman, S. Komossa, Z. Paragi, M. Perez-Torres, E. Piconcelli,
L. Ducci, M. Parvatikar, R. Serafinelli, Monthly Notices of the Royal Astronomical
Society 519 (2022) 5149–5160.
date_created: 2024-09-05T12:23:59Z
date_published: 2022-12-15T00:00:00Z
date_updated: 2024-09-19T11:24:50Z
day: '15'
doi: 10.1093/mnras/stac3664
extern: '1'
intvolume: ' 519'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stac3664
month: '12'
oa: 1
oa_version: None
page: 5149-5160
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: The X-ray view of optically selected dual AGN
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 519
year: '2022'
...
---
_id: '17582'
abstract:
- lang: eng
text: We use long-run, high-resolution hydrodynamics simulations to compute the
multi-wavelength light curves (LCs) from thermal disk emission around accreting
equal-mass supermassive black hole (BH) binaries, with a focus on revealing binary
eccentricity. LCs are obtained by modeling the disk thermodynamics with an adiabatic
equation of state, a local blackbody cooling prescription, and corrections to
approximate the effects of radiation pressure. We find that modulation of multi-band
LCs on the orbital time scale are generally in-phase (to within ∼2% of a binary
orbital period), but they contain pulse substructure in the time domain that is
not necessarily reflected in BH accretion rates M˙. We thus predict that binary-hosting
AGN will exhibit highly correlated, in-phase, periodic brightness modulations
in their low-energy disk emission. However, detectability of these modulations
in multi-wavelength observing campaigns could be seriously compromised because
observed stochastic variability in AGNs typically has a higher amplitude than
our proposed signal. It is possible that observations over temporal baselines
of many binary periods may make the signal more prominent, but this would need
to be analyzed carefully. If jet emission is predicted by M˙, then we predict
a weaker correlation with low-energy disk emission due to the differing sub-peak
structure. For the binary parameters we explore, we show that LC variability due
to hydrodynamics likely dominates Doppler brightening for all equal-mass binaries
with disk Mach numbers ≲20. A promising signature of eccentricity is weak or absent
"lump" periodicity. We find hints that a significant lag exists between M˙ and
low-energy disk emission for circular binaries, but they are in-phase for eccentric
binaries, which might explain some "orphan" blazar flares with no γ-ray counterpart.
article_number: '103010'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: John Ryan
full_name: Westernacher-Schneider, John Ryan
last_name: Westernacher-Schneider
- first_name: Jonathan
full_name: Zrake, Jonathan
last_name: Zrake
- first_name: Andrew
full_name: MacFadyen, Andrew
last_name: MacFadyen
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Westernacher-Schneider JR, Zrake J, MacFadyen A, Haiman Z. Multiband light
curves from eccentric accreting supermassive black hole binaries. Physical
Review D. 2022;106(10). doi:10.1103/physrevd.106.103010
apa: Westernacher-Schneider, J. R., Zrake, J., MacFadyen, A., & Haiman, Z. (2022).
Multiband light curves from eccentric accreting supermassive black hole binaries.
Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.106.103010
chicago: Westernacher-Schneider, John Ryan, Jonathan Zrake, Andrew MacFadyen, and
Zoltán Haiman. “Multiband Light Curves from Eccentric Accreting Supermassive Black
Hole Binaries.” Physical Review D. American Physical Society, 2022. https://doi.org/10.1103/physrevd.106.103010.
ieee: J. R. Westernacher-Schneider, J. Zrake, A. MacFadyen, and Z. Haiman, “Multiband
light curves from eccentric accreting supermassive black hole binaries,” Physical
Review D, vol. 106, no. 10. American Physical Society, 2022.
ista: Westernacher-Schneider JR, Zrake J, MacFadyen A, Haiman Z. 2022. Multiband
light curves from eccentric accreting supermassive black hole binaries. Physical
Review D. 106(10), 103010.
mla: Westernacher-Schneider, John Ryan, et al. “Multiband Light Curves from Eccentric
Accreting Supermassive Black Hole Binaries.” Physical Review D, vol. 106,
no. 10, 103010, American Physical Society, 2022, doi:10.1103/physrevd.106.103010.
short: J.R. Westernacher-Schneider, J. Zrake, A. MacFadyen, Z. Haiman, Physical
Review D 106 (2022).
date_created: 2024-09-05T12:26:24Z
date_published: 2022-11-08T00:00:00Z
date_updated: 2024-09-19T11:36:36Z
day: '08'
doi: 10.1103/physrevd.106.103010
extern: '1'
external_id:
arxiv:
- '2111.06882'
intvolume: ' 106'
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2111.06882
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: Multiband light curves from eccentric accreting supermassive black hole binaries
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 106
year: '2022'
...
---
_id: '17588'
abstract:
- lang: eng
text: Supermassive stars (SMSs) with masses of M∗≃104--105 M⊙ are invoked as possible
seeds of high-redshift supermassive black holes, but it remains under debate whether
their protostar indeed acquires sufficient mass via gas accretion overcoming radiative
feedback. We investigate protostellar growth in dynamically heated atomic-cooling
haloes (ACHs) found in recent cosmological simulations, performing three-dimensional
radiation hydrodynamical (RHD) simulations that consider stellar evolution under
variable mass accretion. We find that one of the ACHs feeds the central protostar
at rates exceeding a critical value, above which the star evolves in a cool bloating
phase and hardly produces ionizing photons. Consequently, the stellar mass reaches
M∗≳104 M⊙ unimpeded by radiative feedback. In the other ACH, where the mass supply
rate is lower, the star spends most of its life as a hot main-sequence star, emitting
intense ionizing radiation. Then, the stellar mass growth is terminated around
500 M⊙ by photoevaporation of the circumstellar disk. A series of our RHD simulations
provide a formula of the final stellar mass determined either by stellar feedback
or their lifetime as a function of the mass supply rate from the parent cloud
in the absence of stellar radiation. Combining the results with the statistical
properties of SMS-forming clouds in high-redshift quasar progenitor haloes, we
construct a top-heavy mass distribution of primordial stars over M∗≃100--105 M⊙,
approximately following a power-law spectrum of ∝M−1.3∗ with a steeper decline
at M∗≳2×104 M⊙. Their massive BH remnants would be further fed via the dense debris
disk, powering "milli-quasars" with a bolometric luminosity of Lbol ≳ 1043 erg
s−1.
article_processing_charge: No
article_type: original
author:
- first_name: Daisuke
full_name: Toyouchi, Daisuke
last_name: Toyouchi
- first_name: Kohei
full_name: Inayoshi, Kohei
last_name: Inayoshi
- first_name: Wenxiu
full_name: Li, Wenxiu
last_name: Li
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Rolf
full_name: Kuiper, Rolf
last_name: Kuiper
citation:
ama: 'Toyouchi D, Inayoshi K, Li W, Haiman Z, Kuiper R. Radiative feedback on supermassive
star formation: the massive end of the population III initial mass function. Monthly
Notices of the Royal Astronomical Society. 2022;518(2):1601-1616. doi:10.1093/mnras/stac3191'
apa: 'Toyouchi, D., Inayoshi, K., Li, W., Haiman, Z., & Kuiper, R. (2022). Radiative
feedback on supermassive star formation: the massive end of the population III
initial mass function. Monthly Notices of the Royal Astronomical Society.
Oxford University Press. https://doi.org/10.1093/mnras/stac3191'
chicago: 'Toyouchi, Daisuke, Kohei Inayoshi, Wenxiu Li, Zoltán Haiman, and Rolf
Kuiper. “Radiative Feedback on Supermassive Star Formation: The Massive End of
the Population III Initial Mass Function.” Monthly Notices of the Royal Astronomical
Society. Oxford University Press, 2022. https://doi.org/10.1093/mnras/stac3191.'
ieee: 'D. Toyouchi, K. Inayoshi, W. Li, Z. Haiman, and R. Kuiper, “Radiative feedback
on supermassive star formation: the massive end of the population III initial
mass function,” Monthly Notices of the Royal Astronomical Society, vol.
518, no. 2. Oxford University Press, pp. 1601–1616, 2022.'
ista: 'Toyouchi D, Inayoshi K, Li W, Haiman Z, Kuiper R. 2022. Radiative feedback
on supermassive star formation: the massive end of the population III initial
mass function. Monthly Notices of the Royal Astronomical Society. 518(2), 1601–1616.'
mla: 'Toyouchi, Daisuke, et al. “Radiative Feedback on Supermassive Star Formation:
The Massive End of the Population III Initial Mass Function.” Monthly Notices
of the Royal Astronomical Society, vol. 518, no. 2, Oxford University Press,
2022, pp. 1601–16, doi:10.1093/mnras/stac3191.'
short: D. Toyouchi, K. Inayoshi, W. Li, Z. Haiman, R. Kuiper, Monthly Notices of
the Royal Astronomical Society 518 (2022) 1601–1616.
date_created: 2024-09-05T12:33:59Z
date_published: 2022-11-09T00:00:00Z
date_updated: 2024-09-19T12:06:18Z
day: '09'
doi: 10.1093/mnras/stac3191
extern: '1'
intvolume: ' 518'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stac3191
month: '11'
oa: 1
oa_version: Published Version
page: 1601-1616
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: 'Radiative feedback on supermassive star formation: the massive end of the
population III initial mass function'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 518
year: '2022'
...
---
_id: '17599'
abstract:
- lang: eng
text: Next-generation weak lensing (WL) surveys, such as by the Vera Rubin Observatory,
the Roman Space Telescope, and the Euclid space mission, will supply vast amounts
of data probing small, highly non-linear scales. Extracting information from these
scales requires higher-order statistics and the controlling of related systematics
such as baryonic effects. To account for baryonic effects in cosmological analyses
at reduced computational cost, semi-analytic baryonic correction models (BCMs)
have been proposed. Here, we study the accuracy of a particular BCM (the A20-BCM)
for WL peak counts, a well-studied, simple, and effective higher-order statistic.
We compare WL peak counts generated from the full hydrodynamical simulation IllustrisTNG
and a baryon-corrected version of the corresponding dark matter-only simulation
IllustrisTNG-Dark. We apply galaxy shape noise matching depths reached by DES,
KiDS, HSC, LSST, Roman, and Euclid. We find that peak counts from the A20-BCM
are (i) accurate at per cent level for peaks with S/N < 4, (ii) statistically
indistinguishable from IllustrisTNG in most current and ongoing surveys, but (iii)
insufficient for deep future surveys covering the largest solid angles, such as
LSST and Euclid. We find that the BCM matches individual peaks accurately, but
underpredicts the amplitude of the highest peaks. We conclude that the A20-BCM
is a viable substitute for full hydrodynamical simulations in cosmological parameter
estimation from beyond-Gaussian statistics for ongoing and future surveys with
modest solid angles. For the largest surveys, the A20-BCM must be refined to provide
a more accurate match, especially to the highest peaks.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Max E
full_name: Lee, Max E
last_name: Lee
- first_name: Tianhuan
full_name: Lu, Tianhuan
last_name: Lu
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Jia
full_name: Liu, Jia
last_name: Liu
- first_name: Ken
full_name: Osato, Ken
last_name: Osato
citation:
ama: Lee ME, Lu T, Haiman Z, Liu J, Osato K. Comparing weak lensing peak counts
in baryonic correction models to hydrodynamical simulations. Monthly Notices
of the Royal Astronomical Society. 2022;519(1):573-584. doi:10.1093/mnras/stac3592
apa: Lee, M. E., Lu, T., Haiman, Z., Liu, J., & Osato, K. (2022). Comparing
weak lensing peak counts in baryonic correction models to hydrodynamical simulations.
Monthly Notices of the Royal Astronomical Society. Oxford University Press.
https://doi.org/10.1093/mnras/stac3592
chicago: Lee, Max E, Tianhuan Lu, Zoltán Haiman, Jia Liu, and Ken Osato. “Comparing
Weak Lensing Peak Counts in Baryonic Correction Models to Hydrodynamical Simulations.”
Monthly Notices of the Royal Astronomical Society. Oxford University Press,
2022. https://doi.org/10.1093/mnras/stac3592.
ieee: M. E. Lee, T. Lu, Z. Haiman, J. Liu, and K. Osato, “Comparing weak lensing
peak counts in baryonic correction models to hydrodynamical simulations,” Monthly
Notices of the Royal Astronomical Society, vol. 519, no. 1. Oxford University
Press, pp. 573–584, 2022.
ista: Lee ME, Lu T, Haiman Z, Liu J, Osato K. 2022. Comparing weak lensing peak
counts in baryonic correction models to hydrodynamical simulations. Monthly Notices
of the Royal Astronomical Society. 519(1), 573–584.
mla: Lee, Max E., et al. “Comparing Weak Lensing Peak Counts in Baryonic Correction
Models to Hydrodynamical Simulations.” Monthly Notices of the Royal Astronomical
Society, vol. 519, no. 1, Oxford University Press, 2022, pp. 573–84, doi:10.1093/mnras/stac3592.
short: M.E. Lee, T. Lu, Z. Haiman, J. Liu, K. Osato, Monthly Notices of the Royal
Astronomical Society 519 (2022) 573–584.
date_created: 2024-09-05T13:06:13Z
date_published: 2022-12-08T00:00:00Z
date_updated: 2024-09-23T13:13:25Z
day: '08'
doi: 10.1093/mnras/stac3592
extern: '1'
external_id:
arxiv:
- '2201.08320'
intvolume: ' 519'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2201.08320'
month: '12'
oa: 1
oa_version: Preprint
page: 573-584
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: Comparing weak lensing peak counts in baryonic correction models to hydrodynamical
simulations
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 519
year: '2022'
...
---
_id: '17608'
abstract:
- lang: eng
text: We study the long-term evolution of the global structure of axisymmetric accretion
flows onto a black hole (BH) at rates substantially higher than the Eddington
value (M˙Edd), performing two-dimensional hydrodynamical simulations with and
without radiative diffusion. In the high-accretion optically-thick limit, where
the radiation energy is efficiently trapped within the inflow, the accretion flow
becomes adiabatic and comprises of turbulent gas in the equatorial region and
strong bipolar outflows. As a result, the mass inflow rate decreases toward the
center as M˙in∝rp with p∼0.5−0.7 and a small fraction of the inflowing gas feeds
the nuclear BH. Thus, super-Eddington accretion is sustained only when a larger
amount of gas is supplied from larger radii at >100−1000 M˙Edd. The global structure
of the flow settles down to a quasi-steady state in millions of the orbital timescale
at the BH event horizon, which is >10−100 times longer than that addressed in
previous (magneto-)RHD simulation studies. Energy transport via radiative diffusion
accelerates the outflow near the poles in the inner region but does not change
the overall properties of the accretion flow compared to the cases without diffusion.
Based on our simulation results, we provide a mechanical feedback model for super-Eddington
accreting BHs. This can be applied as a sub-grid model in large-scale cosmological
simulations that do not sufficiently resolve galactic nuclei, and to the formation
of the heaviest gravitational-wave sources via accretion in dense environments.
article_number: '132'
article_processing_charge: No
article_type: original
author:
- first_name: Haojie
full_name: Hu, Haojie
last_name: Hu
- 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: Eliot
full_name: Quataert, Eliot
last_name: Quataert
- first_name: Rolf
full_name: Kuiper, Rolf
last_name: Kuiper
citation:
ama: 'Hu H, Inayoshi K, Haiman Z, Quataert E, Kuiper R. Long-term evolution of supercritical
black hole accretion with outflows: A subgrid feedback model for cosmological
simulations. The Astrophysical Journal. 2022;934(2). doi:10.3847/1538-4357/ac75d8'
apa: 'Hu, H., Inayoshi, K., Haiman, Z., Quataert, E., & Kuiper, R. (2022). Long-term
evolution of supercritical black hole accretion with outflows: A subgrid feedback
model for cosmological simulations. The Astrophysical Journal. American
Astronomical Society. https://doi.org/10.3847/1538-4357/ac75d8'
chicago: 'Hu, Haojie, Kohei Inayoshi, Zoltán Haiman, Eliot Quataert, and Rolf Kuiper.
“Long-Term Evolution of Supercritical Black Hole Accretion with Outflows: A Subgrid
Feedback Model for Cosmological Simulations.” The Astrophysical Journal.
American Astronomical Society, 2022. https://doi.org/10.3847/1538-4357/ac75d8.'
ieee: 'H. Hu, K. Inayoshi, Z. Haiman, E. Quataert, and R. Kuiper, “Long-term evolution
of supercritical black hole accretion with outflows: A subgrid feedback model
for cosmological simulations,” The Astrophysical Journal, vol. 934, no.
2. American Astronomical Society, 2022.'
ista: 'Hu H, Inayoshi K, Haiman Z, Quataert E, Kuiper R. 2022. Long-term evolution
of supercritical black hole accretion with outflows: A subgrid feedback model
for cosmological simulations. The Astrophysical Journal. 934(2), 132.'
mla: 'Hu, Haojie, et al. “Long-Term Evolution of Supercritical Black Hole Accretion
with Outflows: A Subgrid Feedback Model for Cosmological Simulations.” The
Astrophysical Journal, vol. 934, no. 2, 132, American Astronomical Society,
2022, doi:10.3847/1538-4357/ac75d8.'
short: H. Hu, K. Inayoshi, Z. Haiman, E. Quataert, R. Kuiper, The Astrophysical
Journal 934 (2022).
date_created: 2024-09-05T13:17:38Z
date_published: 2022-08-01T00:00:00Z
date_updated: 2024-09-23T14:23:12Z
day: '01'
doi: 10.3847/1538-4357/ac75d8
extern: '1'
intvolume: ' 934'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3847/1538-4357/ac75d8
month: '08'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Long-term evolution of supercritical black hole accretion with outflows: A
subgrid feedback model for cosmological simulations'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 934
year: '2022'
...
---
_id: '7791'
abstract:
- lang: eng
text: Extending a result of Milena Radnovic and Serge Tabachnikov, we establish
conditionsfor two different non-symmetric norms to define the same billiard reflection
law.
acknowledgement: AA was supported by European Research Council (ERC) under the European
Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 78818
Alpha). RK was supported by the Federal professorship program Grant 1.456.2016/1.4
and the Russian Foundation for Basic Research Grants 18-01-00036 and 19-01-00169.
Open access funding provided by Institute of Science and Technology (IST Austria).
The authors thank Alexey Balitskiy, Milena Radnović, and Serge Tabachnikov for useful
discussions.
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Arseniy
full_name: Akopyan, Arseniy
id: 430D2C90-F248-11E8-B48F-1D18A9856A87
last_name: Akopyan
orcid: 0000-0002-2548-617X
- first_name: Roman
full_name: Karasev, Roman
last_name: Karasev
citation:
ama: Akopyan A, Karasev R. When different norms lead to same billiard trajectories?
European Journal of Mathematics. 2022;8(4):1309-1312. doi:10.1007/s40879-020-00405-0
apa: Akopyan, A., & Karasev, R. (2022). When different norms lead to same billiard
trajectories? European Journal of Mathematics. Springer Nature. https://doi.org/10.1007/s40879-020-00405-0
chicago: Akopyan, Arseniy, and Roman Karasev. “When Different Norms Lead to Same
Billiard Trajectories?” European Journal of Mathematics. Springer Nature,
2022. https://doi.org/10.1007/s40879-020-00405-0.
ieee: A. Akopyan and R. Karasev, “When different norms lead to same billiard trajectories?,”
European Journal of Mathematics, vol. 8, no. 4. Springer Nature, pp. 1309–1312,
2022.
ista: Akopyan A, Karasev R. 2022. When different norms lead to same billiard trajectories?
European Journal of Mathematics. 8(4), 1309–1312.
mla: Akopyan, Arseniy, and Roman Karasev. “When Different Norms Lead to Same Billiard
Trajectories?” European Journal of Mathematics, vol. 8, no. 4, Springer
Nature, 2022, pp. 1309–12, doi:10.1007/s40879-020-00405-0.
short: A. Akopyan, R. Karasev, European Journal of Mathematics 8 (2022) 1309–1312.
corr_author: '1'
date_created: 2020-05-03T22:00:48Z
date_published: 2022-12-01T00:00:00Z
date_updated: 2025-04-14T07:48:36Z
day: '01'
ddc:
- '510'
department:
- _id: HeEd
doi: 10.1007/s40879-020-00405-0
ec_funded: 1
external_id:
arxiv:
- '1912.12685'
file:
- access_level: open_access
checksum: f53e71fd03744075adcd0b8fc1b8423d
content_type: application/pdf
creator: dernst
date_created: 2020-05-04T10:33:42Z
date_updated: 2020-07-14T12:48:03Z
file_id: '7796'
file_name: 2020_EuropMathematics_Akopyan.pdf
file_size: 263926
relation: main_file
file_date_updated: 2020-07-14T12:48:03Z
has_accepted_license: '1'
intvolume: ' 8'
issue: '4'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
page: 1309 - 1312
project:
- _id: 266A2E9E-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '788183'
name: Alpha Shape Theory Extended
- _id: B67AFEDC-15C9-11EA-A837-991A96BB2854
name: IST Austria Open Access Fund
publication: European Journal of Mathematics
publication_identifier:
eissn:
- 2199-6768
issn:
- 2199-675X
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: When different norms lead to same billiard trajectories?
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2022'
...
---
_id: '8286'
abstract:
- lang: eng
text: "We consider the following dynamic load-balancing process: given an underlying
graph G with n nodes, in each step t≥ 0, one unit of load is created, and placed
at a randomly chosen graph node. In the same step, the chosen node picks a random
neighbor, and the two nodes balance their loads by averaging them. We are interested
in the expected gap between the minimum and maximum loads at nodes as the process
progresses, and its dependence on n and on the graph structure. Variants of the
above graphical balanced allocation process have been studied previously by Peres,
Talwar, and Wieder [Peres et al., 2015], and by Sauerwald and Sun [Sauerwald and
Sun, 2015]. These authors left as open the question of characterizing the gap
in the case of cycle graphs in the dynamic case, where weights are created during
the algorithm’s execution. For this case, the only known upper bound is of \U0001D4AA(n
log n), following from a majorization argument due to [Peres et al., 2015], which
analyzes a related graphical allocation process. In this paper, we provide an
upper bound of \U0001D4AA (√n log n) on the expected gap of the above process
for cycles of length n. We introduce a new potential analysis technique, which
enables us to bound the difference in load between k-hop neighbors on the cycle,
for any k ≤ n/2. We complement this with a \"gap covering\" argument, which bounds
the maximum value of the gap by bounding its value across all possible subsets
of a certain structure, and recursively bounding the gaps within each subset.
We provide analytical and experimental evidence that our upper bound on the gap
is tight up to a logarithmic factor. "
acknowledgement: The authors sincerely thank Thomas Sauerwald and George Giakkoupis
for insightful discussions, and Mohsen Ghaffari, Yuval Peres, and Udi Wieder for
feedback on earlier versions of this draft. We also thank the ICALP anonymous reviewers
for their very useful comments. Open access funding provided by Institute of Science
and Technology (IST Austria). Funding was provided by European Research Council
(Grant No. PR1042ERC01).
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Dan-Adrian
full_name: Alistarh, Dan-Adrian
id: 4A899BFC-F248-11E8-B48F-1D18A9856A87
last_name: Alistarh
orcid: 0000-0003-3650-940X
- first_name: Giorgi
full_name: Nadiradze, Giorgi
id: 3279A00C-F248-11E8-B48F-1D18A9856A87
last_name: Nadiradze
orcid: 0000-0001-5634-0731
- first_name: Amirmojtaba
full_name: Sabour, Amirmojtaba
id: bcc145fd-e77f-11ea-ae8b-80d661dbff67
last_name: Sabour
citation:
ama: Alistarh D-A, Nadiradze G, Sabour A. Dynamic averaging load balancing on cycles.
Algorithmica. 2022;84(4):1007-1029. doi:10.1007/s00453-021-00905-9
apa: 'Alistarh, D.-A., Nadiradze, G., & Sabour, A. (2022). Dynamic averaging
load balancing on cycles. Algorithmica. Virtual, Online; Germany: Springer
Nature. https://doi.org/10.1007/s00453-021-00905-9'
chicago: Alistarh, Dan-Adrian, Giorgi Nadiradze, and Amirmojtaba Sabour. “Dynamic
Averaging Load Balancing on Cycles.” Algorithmica. Springer Nature, 2022.
https://doi.org/10.1007/s00453-021-00905-9.
ieee: D.-A. Alistarh, G. Nadiradze, and A. Sabour, “Dynamic averaging load balancing
on cycles,” Algorithmica, vol. 84, no. 4. Springer Nature, pp. 1007–1029,
2022.
ista: Alistarh D-A, Nadiradze G, Sabour A. 2022. Dynamic averaging load balancing
on cycles. Algorithmica. 84(4), 1007–1029.
mla: Alistarh, Dan-Adrian, et al. “Dynamic Averaging Load Balancing on Cycles.”
Algorithmica, vol. 84, no. 4, Springer Nature, 2022, pp. 1007–29, doi:10.1007/s00453-021-00905-9.
short: D.-A. Alistarh, G. Nadiradze, A. Sabour, Algorithmica 84 (2022) 1007–1029.
conference:
end_date: 2020-07-11
location: Virtual, Online; Germany
name: 'ICALP: Automata, Languages and Programming'
start_date: 2020-07-08
date_created: 2020-08-24T06:24:04Z
date_published: 2022-04-01T00:00:00Z
date_updated: 2025-07-10T11:55:11Z
day: '01'
ddc:
- '000'
department:
- _id: DaAl
doi: 10.1007/s00453-021-00905-9
ec_funded: 1
external_id:
arxiv:
- '2003.09297'
isi:
- '000734004600001'
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month: '04'
oa: 1
oa_version: Published Version
page: 1007-1029
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call_identifier: H2020
grant_number: '805223'
name: Elastic Coordination for Scalable Machine Learning
- _id: B67AFEDC-15C9-11EA-A837-991A96BB2854
name: IST Austria Open Access Fund
publication: Algorithmica
publication_identifier:
eissn:
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issn:
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publication_status: published
publisher: Springer Nature
quality_controlled: '1'
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url: https://doi.org/10.4230/LIPIcs.ICALP.2020.7
record:
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relation: earlier_version
status: public
scopus_import: '1'
status: public
title: Dynamic averaging load balancing on cycles
tmp:
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name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 84
year: '2022'
...
---
_id: '8538'
abstract:
- lang: eng
text: We prove some recent experimental observations of Dan Reznik concerning periodic
billiard orbits in ellipses. For example, the sum of cosines of the angles of
a periodic billiard polygon remains constant in the 1-parameter family of such
polygons (that exist due to the Poncelet porism). In our proofs, we use geometric
and complex analytic methods.
acknowledgement: " This paper would not be written if not for Dan Reznik’s curiosity
and persistence; we are very grateful to him. We also thank R. Garcia and J. Koiller
for interesting discussions. It is a pleasure to thank the Mathematical Institute
of the University of Heidelberg for its stimulating atmosphere. ST thanks M. Bialy
for interesting discussions and the Tel Aviv\r\nUniversity for its invariable hospitality.
AA was supported by European Research Council (ERC) under the European Union’s Horizon
2020 research and innovation programme (grant agreement No 78818 Alpha). RS is supported
by NSF Grant DMS-1807320. ST was supported by NSF grant DMS-1510055 and SFB/TRR
191."
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Arseniy
full_name: Akopyan, Arseniy
id: 430D2C90-F248-11E8-B48F-1D18A9856A87
last_name: Akopyan
orcid: 0000-0002-2548-617X
- first_name: Richard
full_name: Schwartz, Richard
last_name: Schwartz
- first_name: Serge
full_name: Tabachnikov, Serge
last_name: Tabachnikov
citation:
ama: Akopyan A, Schwartz R, Tabachnikov S. Billiards in ellipses revisited. European
Journal of Mathematics. 2022;8(4):1313-1327. doi:10.1007/s40879-020-00426-9
apa: Akopyan, A., Schwartz, R., & Tabachnikov, S. (2022). Billiards in ellipses
revisited. European Journal of Mathematics. Springer Nature. https://doi.org/10.1007/s40879-020-00426-9
chicago: Akopyan, Arseniy, Richard Schwartz, and Serge Tabachnikov. “Billiards in
Ellipses Revisited.” European Journal of Mathematics. Springer Nature,
2022. https://doi.org/10.1007/s40879-020-00426-9.
ieee: A. Akopyan, R. Schwartz, and S. Tabachnikov, “Billiards in ellipses revisited,”
European Journal of Mathematics, vol. 8, no. 4. Springer Nature, pp. 1313–1327,
2022.
ista: Akopyan A, Schwartz R, Tabachnikov S. 2022. Billiards in ellipses revisited.
European Journal of Mathematics. 8(4), 1313–1327.
mla: Akopyan, Arseniy, et al. “Billiards in Ellipses Revisited.” European Journal
of Mathematics, vol. 8, no. 4, Springer Nature, 2022, pp. 1313–27, doi:10.1007/s40879-020-00426-9.
short: A. Akopyan, R. Schwartz, S. Tabachnikov, European Journal of Mathematics
8 (2022) 1313–1327.
date_created: 2020-09-20T22:01:38Z
date_published: 2022-12-01T00:00:00Z
date_updated: 2025-04-14T07:48:34Z
day: '01'
department:
- _id: HeEd
doi: 10.1007/s40879-020-00426-9
ec_funded: 1
external_id:
arxiv:
- '2001.02934'
intvolume: ' 8'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2001.02934
month: '12'
oa: 1
oa_version: Preprint
page: 1313-1327
project:
- _id: 266A2E9E-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '788183'
name: Alpha Shape Theory Extended
publication: European Journal of Mathematics
publication_identifier:
eissn:
- 2199-6768
issn:
- 2199-675X
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Billiards in ellipses revisited
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2022'
...
---
_id: '9199'
abstract:
- lang: eng
text: "We associate a certain tensor product lattice to any primitive integer lattice
and ask about its typical shape. These lattices are related to the tangent bundle
of Grassmannians and their study is motivated by Peyre's programme on \"freeness\"
for rational points of bounded height on Fano\r\nvarieties."
acknowledgement: The authors are very grateful to Will Sawin for useful remarks about
this topic. While working on this paper the first two authors were supported by
EPSRC grant EP/P026710/1, and the first and last authors by FWF grant P 32428-N35.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Tal
full_name: Horesh, Tal
id: C8B7BF48-8D81-11E9-BCA9-F536E6697425
last_name: Horesh
- first_name: Florian Alexander
full_name: Wilsch, Florian Alexander
id: 560601DA-8D36-11E9-A136-7AC1E5697425
last_name: Wilsch
orcid: 0000-0001-7302-8256
citation:
ama: Browning TD, Horesh T, Wilsch FA. Equidistribution and freeness on Grassmannians.
Algebra & Number Theory. 2022;16(10):2385-2407. doi:10.2140/ant.2022.16.2385
apa: Browning, T. D., Horesh, T., & Wilsch, F. A. (2022). Equidistribution and
freeness on Grassmannians. Algebra & Number Theory. Mathematical Sciences
Publishers. https://doi.org/10.2140/ant.2022.16.2385
chicago: Browning, Timothy D, Tal Horesh, and Florian Alexander Wilsch. “Equidistribution
and Freeness on Grassmannians.” Algebra & Number Theory. Mathematical
Sciences Publishers, 2022. https://doi.org/10.2140/ant.2022.16.2385.
ieee: T. D. Browning, T. Horesh, and F. A. Wilsch, “Equidistribution and freeness
on Grassmannians,” Algebra & Number Theory, vol. 16, no. 10. Mathematical
Sciences Publishers, pp. 2385–2407, 2022.
ista: Browning TD, Horesh T, Wilsch FA. 2022. Equidistribution and freeness on Grassmannians.
Algebra & Number Theory. 16(10), 2385–2407.
mla: Browning, Timothy D., et al. “Equidistribution and Freeness on Grassmannians.”
Algebra & Number Theory, vol. 16, no. 10, Mathematical Sciences Publishers,
2022, pp. 2385–407, doi:10.2140/ant.2022.16.2385.
short: T.D. Browning, T. Horesh, F.A. Wilsch, Algebra & Number Theory 16 (2022)
2385–2407.
corr_author: '1'
date_created: 2021-02-25T09:56:57Z
date_published: 2022-12-01T00:00:00Z
date_updated: 2025-04-14T09:25:44Z
day: '01'
department:
- _id: TiBr
doi: 10.2140/ant.2022.16.2385
external_id:
arxiv:
- '2102.11552'
isi:
- '000961514100004'
intvolume: ' 16'
isi: 1
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2102.11552
month: '12'
oa: 1
oa_version: Preprint
page: 2385-2407
project:
- _id: 26A8D266-B435-11E9-9278-68D0E5697425
grant_number: EP-P026710-2
name: Between rational and integral points
- _id: 26AEDAB2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P32428
name: New frontiers of the Manin conjecture
publication: Algebra & Number Theory
publication_identifier:
eissn:
- 1944-7833
issn:
- 1937-0652
publication_status: published
publisher: Mathematical Sciences Publishers
quality_controlled: '1'
scopus_import: '1'
status: public
title: Equidistribution and freeness on Grassmannians
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 16
year: '2022'
...
---
_id: '9336'
abstract:
- lang: eng
text: Mentorship is experience and/or knowledge‐based guidance. Mentors support,
sponsor and advocate for mentees. Having one or more mentors when you seek advice
can significantly influence and improve your research endeavours, well‐being and
career development. Positive mentee–mentor relationships are vital for maintaining
work–life balance and success in careers. Early‐career researchers (ECRs), in
particular, can benefit from mentorship to navigate challenges in academic and
nonacademic life and careers. Yet, strategies for selecting mentors and maintaining
interactions with them are often underdiscussed within research environments.
In this Words of Advice, we provide recommendations for ECRs to seek and manage
mentorship interactions. Our article draws from our experiences as ECRs and published
work, to provide suggestions for mentees to proactively promote beneficial mentorship
interactions. The recommended practices highlight the importance of identifying
mentorship needs, planning and selecting multiple and diverse mentors, setting
goals, and maintaining constructive, and mutually beneficial working relationships
with mentors.
acknowledgement: The authors thank Nicholas Asby of the University of Chicago for
valuable comments on an earlier version of this work. A.P.S. was partially supported
by the NARSAD Young Investigator Grant 27705. S.J.H was supported by the National
Institutes of Health grant R35GM133732.
alternative_title:
- Words of Advice
article_processing_charge: No
article_type: original
author:
- first_name: Sarvenaz
full_name: Sarabipour, Sarvenaz
last_name: Sarabipour
- first_name: Sarah J.
full_name: Hainer, Sarah J.
last_name: Hainer
- first_name: Feyza N
full_name: Arslan, Feyza N
id: 49DA7910-F248-11E8-B48F-1D18A9856A87
last_name: Arslan
orcid: 0000-0001-5809-9566
- first_name: Charlotte M.
full_name: De Winde, Charlotte M.
last_name: De Winde
- first_name: Emily
full_name: Furlong, Emily
last_name: Furlong
- first_name: Natalia
full_name: Bielczyk, Natalia
last_name: Bielczyk
- first_name: Nafisa M.
full_name: Jadavji, Nafisa M.
last_name: Jadavji
- first_name: Aparna P.
full_name: Shah, Aparna P.
last_name: Shah
- first_name: Sejal
full_name: Davla, Sejal
last_name: Davla
citation:
ama: Sarabipour S, Hainer SJ, Arslan FN, et al. Building and sustaining mentor interactions
as a mentee. FEBS Journal. 2022;289(6):1374-1384. doi:10.1111/febs.15823
apa: Sarabipour, S., Hainer, S. J., Arslan, F. N., De Winde, C. M., Furlong, E.,
Bielczyk, N., … Davla, S. (2022). Building and sustaining mentor interactions
as a mentee. FEBS Journal. Wiley. https://doi.org/10.1111/febs.15823
chicago: Sarabipour, Sarvenaz, Sarah J. Hainer, Feyza N Arslan, Charlotte M. De
Winde, Emily Furlong, Natalia Bielczyk, Nafisa M. Jadavji, Aparna P. Shah, and
Sejal Davla. “Building and Sustaining Mentor Interactions as a Mentee.” FEBS
Journal. Wiley, 2022. https://doi.org/10.1111/febs.15823.
ieee: S. Sarabipour et al., “Building and sustaining mentor interactions
as a mentee,” FEBS Journal, vol. 289, no. 6. Wiley, pp. 1374–1384, 2022.
ista: Sarabipour S, Hainer SJ, Arslan FN, De Winde CM, Furlong E, Bielczyk N, Jadavji
NM, Shah AP, Davla S. 2022. Building and sustaining mentor interactions as a mentee.
FEBS Journal. 289(6), 1374–1384.
mla: Sarabipour, Sarvenaz, et al. “Building and Sustaining Mentor Interactions as
a Mentee.” FEBS Journal, vol. 289, no. 6, Wiley, 2022, pp. 1374–84, doi:10.1111/febs.15823.
short: S. Sarabipour, S.J. Hainer, F.N. Arslan, C.M. De Winde, E. Furlong, N. Bielczyk,
N.M. Jadavji, A.P. Shah, S. Davla, FEBS Journal 289 (2022) 1374–1384.
date_created: 2021-04-18T22:01:43Z
date_published: 2022-03-01T00:00:00Z
date_updated: 2024-05-22T11:17:55Z
day: '01'
department:
- _id: CaHe
doi: 10.1111/febs.15823
external_id:
isi:
- '000636678800001'
pmid:
- '33818917'
intvolume: ' 289'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1111/febs.15823
month: '03'
oa: 1
oa_version: Published Version
page: 1374-1384
pmid: 1
publication: FEBS Journal
publication_identifier:
eissn:
- 1742-4658
issn:
- 1742-464X
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Building and sustaining mentor interactions as a mentee
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 289
year: '2022'
...
---
_id: '9364'
abstract:
- lang: eng
text: 'Let t : Fp → C be a complex valued function on Fp. A classical problem in
analytic number theory is bounding the maximum M(t) := max 0≤H 0 there exists a large subset of a ∈ F×p
such that for kl a,1,p : x → e((ax+x) / p) we have M(kla,1,p) ≥ (1−ε/√2π + o(1))
log log p, as p→∞. Finally, we prove a result on the growth of the moments of
{M (kla,1,p)}a∈F×p. 2020 Mathematics Subject Classification: 11L03, 11T23 (Primary);
14F20, 60F10 (Secondary).'
acknowledgement: I am most thankful to my advisor, Emmanuel Kowalski, for suggesting
this problem and for his guidance during these years. I also would like to thank
Youness Lamzouri for informing me about his work on sum of incomplete Birch sums
and Tal Horesh for her suggestions on a previous version of the paper. Finally,
I am very grateful to the anonymous referee for their careful reading of the manuscript
and their valuable comments.
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Dante
full_name: Bonolis, Dante
id: 6A459894-5FDD-11E9-AF35-BB24E6697425
last_name: Bonolis
citation:
ama: Bonolis D. On the size of the maximum of incomplete Kloosterman sums. Mathematical
Proceedings of the Cambridge Philosophical Society. 2022;172(3):563-590. doi:10.1017/S030500412100030X
apa: Bonolis, D. (2022). On the size of the maximum of incomplete Kloosterman sums.
Mathematical Proceedings of the Cambridge Philosophical Society. Cambridge
University Press. https://doi.org/10.1017/S030500412100030X
chicago: Bonolis, Dante. “On the Size of the Maximum of Incomplete Kloosterman Sums.”
Mathematical Proceedings of the Cambridge Philosophical Society. Cambridge
University Press, 2022. https://doi.org/10.1017/S030500412100030X.
ieee: D. Bonolis, “On the size of the maximum of incomplete Kloosterman sums,” Mathematical
Proceedings of the Cambridge Philosophical Society, vol. 172, no. 3. Cambridge
University Press, pp. 563–590, 2022.
ista: Bonolis D. 2022. On the size of the maximum of incomplete Kloosterman sums.
Mathematical Proceedings of the Cambridge Philosophical Society. 172(3), 563–590.
mla: Bonolis, Dante. “On the Size of the Maximum of Incomplete Kloosterman Sums.”
Mathematical Proceedings of the Cambridge Philosophical Society, vol. 172,
no. 3, Cambridge University Press, 2022, pp. 563–90, doi:10.1017/S030500412100030X.
short: D. Bonolis, Mathematical Proceedings of the Cambridge Philosophical Society
172 (2022) 563–590.
date_created: 2021-05-02T22:01:29Z
date_published: 2022-05-01T00:00:00Z
date_updated: 2023-08-02T06:47:48Z
day: '01'
ddc:
- '510'
department:
- _id: TiBr
doi: 10.1017/S030500412100030X
external_id:
arxiv:
- '1811.10563'
isi:
- '000784421500001'
file:
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checksum: 614d2e9b83a78100408e4ee7752a80a8
content_type: application/pdf
creator: cchlebak
date_created: 2021-12-01T14:01:54Z
date_updated: 2021-12-01T14:01:54Z
file_id: '10395'
file_name: 2021_MathProcCamPhilSoc_Bonolis.pdf
file_size: 334064
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success: 1
file_date_updated: 2021-12-01T14:01:54Z
has_accepted_license: '1'
intvolume: ' 172'
isi: 1
issue: '3'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
page: 563 - 590
publication: Mathematical Proceedings of the Cambridge Philosophical Society
publication_identifier:
eissn:
- 1469-8064
issn:
- 0305-0041
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: On the size of the maximum of incomplete Kloosterman sums
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 172
year: '2022'
...