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arXiv 0907.5515astro-ph.CO
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恒星质量双星黑洞及其合并率的观测证据

Observational evidence for stellar mass binary black holes and their coalescence rate

T. Bulik, K. Belczynski

摘要:

我们回顾了二元黑洞的形成方案,并表明它们的合并率非常强烈地依赖于第二次质量转移的结果。然而,对IC 10 X-1(一个从沃尔夫-拉叶星吸积的大质量黑洞的双星)的观测证明了这种质量转移是稳定的。我们分析了IC 10 X-1的未来演化,表明它很有可能在几个Gyrs内形成一个双黑洞系统。我们估计这样的系统的合并率密度为$ 0.06 {\rm Mpc}^{-3} {\rm Myr}^{-1}$,和$ 0.69 {\rm yr}^{-1} $,比预期的双中子星率高得多的值,目前的LIGO/处女座的检测率。因此,第一次探测到的引力波源很可能是一个双黑洞的合并。

英文摘要:

We review the formation scenarios for binary black holes, and show that their coalescence rate depends very strongly on the outcome of the second mass transfer. However, the observations of IC10 X-1, an binary with a massive black hole accreting from a Wolf-Rayet star proves that this mass transfer can be stable. We analyze the future evolution of IC10 X-1 and show that it is very likely to form a binary black hole system merging in a few Gyrs. We estimate the coalescence rate density of such systems to be $ 0.06 {\rm Mpc}^{-3} {\rm Myr}^{-1}$, and the detection rate for the current LIGO/VIRGO of $ 0.69 {\rm yr}^{-1} $, a much higher value than the expected double neutron star rate. Thus the first detection of a gravitational wave source is likely to be a coalescence of a binary black hole.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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