Populations of Stellar-mass Black Holes from Binary Systems

被引：52

作者：

Wiktorowicz, Grzegorz ^{[1
,2
,3
]}

Wyrzykowski, Lukasz ^{[3
]}

Chruslinska, Martyna ^{[4
]}

Klencki, Jakub ^{[4
]}

Rybicki, Krzysztof A. ^{[3
]}

Belczynski, Krzysztof ^{[5
]}

机构：

[1] Chinese Acad Sci, Natl Astron Observ, Beijing 000, Peoples R China

[2] Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 10001, Peoples R China

[3] Warsaw Univ, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland

[4] Radboud Univ Nijmegen, Inst Math Astrophys & Particle Phys, POB 9010, NL-6500 GL Nijmegen, Netherlands

[5] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Bartycka 18, PL-00716 Warsaw, Poland

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 885卷 / 01期

基金：

中国国家自然科学基金; 欧盟地平线“2020”;

关键词：

Black holes; Astrophysical black holes; Stellar populations; Binary stars; X-ray binary stars; Compact objects; Gravitational microlensing; Gravitational waves; Stellar evolution; X-RAY BINARIES; PULSATIONAL PAIR INSTABILITY; COMPACT OBJECT FORMATION; MICROLENSING EVENT; NEUTRON-STAR; PRESUPERNOVA EVOLUTION; GALACTIC DISTRIBUTION; COMMON ENVELOPE; MAXIMUM MASS; PROGENITORS;

D O I：

10.3847/1538-4357/ab45e6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In large and complicated stellar systems like galaxies, it is difficult to predict the number and characteristics of a black hole (BH) population. Such populations may be modeled as an aggregation of homogeneous (i.e., having uniform star formation history and the same initial chemical composition) stellar populations. Using realistic evolutionary models, we predict the abundances and properties of BHs formed from binaries in these environments. We show that the BH population will be dominated by single BHs originating from binary disruptions and stellar mergers. Furthermore, we discuss how BH populations are influenced by such factors as initial parameters, metallicity, initial mass function, and natal kick models. As an example application of our results, we estimate that about 26 microlensing events happen every year in the direction of the Galactic Bulge due to BHs in a survey like OGLE-IV. Our results may be used to perform in-depth studies related to realistic BH populations, such as observational predictions for space survey missions like Gaia or Einstein Probe. We prepared a publicly available database with the raw data from our simulations to be used for more in-depth studies.

引用

页数：21

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