STELLAR-MASS BLACK HOLES IN YOUNG GALAXIES

被引：13

作者：

Wheeler, J. Craig ^{[1
]}

Johnson, Vincent ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 738卷 / 02期

关键词：

accretion; accretion disks; black hole physics; galaxies: evolution; galaxies: stellar content; radiative transfer; stars: massive; POPULATION III STARS; 1ST GALAXIES; MERGER SIMULATIONS; ACCRETION; FEEDBACK; GROWTH; DISKS; FRAGMENTATION; ONSET; MODEL;

D O I：

10.1088/0004-637X/738/2/163

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore the potential cumulative energy production of stellar-mass black holes in early galaxies. Stellar-mass black holes may accrete substantially from the higher density interstellar media (ISMs) of primordial galaxies, and their energy release would be distributed more uniformly over the galaxies, perhaps providing a different mode of energy feedback into young galaxies than central supermassive black holes. We construct a model for the production and growth of stellar-mass black holes over the first few gigayears of a young galaxy. With the simplifying assumption of a constant density of the ISM, n similar to 10(4)-10(5) cm(-3), we estimate the number of accreting stellar-mass black holes to be similar to 10(6) and the potential energy production to be as high as 10(61) erg over several billion years. For densities less than 10(5) cm(-3), stellar-mass black holes are unlikely to reach their Eddington limit luminosities. The framework we present could be incorporated in numerical simulations to compute the feedback from stellar-mass black holes with inhomogeneous, evolving ISMs.

引用

页数：10

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