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Stellar-mass Black Holes in Globular Clusters : Dynamical consequences and observational signatures

Askar, Abbas LU orcid ; Giersz, Mirek ; Sedda, Manuel Arca ; Askar, Ammar ; Pasquato, Mario and Leveque, Agostino (2019) In Proceedings of the International Astronomical Union 14(351). p.395-399
Abstract

Sizeable number of stellar-mass black holes (BHs) in globular clusters (GCs) can strongly influence the dynamical evolution and observational properties of their host cluster. Using results from a large set of numerical simulations, we identify the key ingredients needed to sustain a sizeable population of BHs in GCs up to a Hubble time. We find that while BH natal kick prescriptions are essential in determining the initial retention fraction of BHs in GCs, the long-Term survival of BHs is determined by the size, initial central density and half-mass relaxation time of the GC. Simulated GC models that contain many BHs are characterized by relatively low central surface brightness, large half-light and core radii values. We also discuss... (More)

Sizeable number of stellar-mass black holes (BHs) in globular clusters (GCs) can strongly influence the dynamical evolution and observational properties of their host cluster. Using results from a large set of numerical simulations, we identify the key ingredients needed to sustain a sizeable population of BHs in GCs up to a Hubble time. We find that while BH natal kick prescriptions are essential in determining the initial retention fraction of BHs in GCs, the long-Term survival of BHs is determined by the size, initial central density and half-mass relaxation time of the GC. Simulated GC models that contain many BHs are characterized by relatively low central surface brightness, large half-light and core radii values. We also discuss novel ways to compare simulated results with available observational data to identify GCs that are most likely to contain many BHs.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
globular clusters: general, stars: black holes, stellar dynamics
in
Proceedings of the International Astronomical Union
volume
14
issue
351
pages
5 pages
publisher
Cambridge University Press
external identifiers
  • scopus:85081986496
ISSN
1743-9213
DOI
10.1017/S1743921319006847
language
English
LU publication?
yes
id
88322491-2a19-4993-8f7f-fdab59810fb8
date added to LUP
2020-04-15 07:44:47
date last changed
2025-10-14 11:56:34
@article{88322491-2a19-4993-8f7f-fdab59810fb8,
  abstract     = {{<p>Sizeable number of stellar-mass black holes (BHs) in globular clusters (GCs) can strongly influence the dynamical evolution and observational properties of their host cluster. Using results from a large set of numerical simulations, we identify the key ingredients needed to sustain a sizeable population of BHs in GCs up to a Hubble time. We find that while BH natal kick prescriptions are essential in determining the initial retention fraction of BHs in GCs, the long-Term survival of BHs is determined by the size, initial central density and half-mass relaxation time of the GC. Simulated GC models that contain many BHs are characterized by relatively low central surface brightness, large half-light and core radii values. We also discuss novel ways to compare simulated results with available observational data to identify GCs that are most likely to contain many BHs.</p>}},
  author       = {{Askar, Abbas and Giersz, Mirek and Sedda, Manuel Arca and Askar, Ammar and Pasquato, Mario and Leveque, Agostino}},
  issn         = {{1743-9213}},
  keywords     = {{globular clusters: general; stars: black holes; stellar dynamics}},
  language     = {{eng}},
  number       = {{351}},
  pages        = {{395--399}},
  publisher    = {{Cambridge University Press}},
  series       = {{Proceedings of the International Astronomical Union}},
  title        = {{Stellar-mass Black Holes in Globular Clusters : Dynamical consequences and observational signatures}},
  url          = {{http://dx.doi.org/10.1017/S1743921319006847}},
  doi          = {{10.1017/S1743921319006847}},
  volume       = {{14}},
  year         = {{2019}},
}