The Mass Distribution of Stellar Black Holes

Details The Mass Distribution of Stellar Black Holes The Mass Distribution of Stellar Black Holes

1997-08-04

arxiv.org/abs/astro-ph/9708032v2

Astronomy and Astrophysics

Astrophysics

22 pages including figures, submitted to ApJ

Scientific paper

10.1086/305614

We examine the distribution of masses of black holes in transient low mass X-ray binary systems. A Bayesian analysis suggests that it is probable that six of the seven systems with measured mass functions have black hole masses clustered near seven solar masses. There appears to be a significant gap between the masses of these systems and those of the observed neutron stars. The remaining source, V404 Cyg, has a mass significantly larger than the others, and our analysis suggests that it is probably drawn from a different distribution. Selection effects do not appear to play a role in producing the observed mass distribution, which may be explained by currently unknown details of the supernova explosions and of binary evolution prior to the supernova.

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