类似于GW190521的双黑洞，总质量约150 M⊙，来自星族III双星演化

arXiv: High Energy Astrophysical Phenomena Pub Date : 2020-09-15 DOI:10.1093/mnrasl/slaa191

T. Kinugawa, Takashi Nakamura, H. Nakano

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引用次数: 41

摘要

在没有金属(III星族)恒星的情况下，我们证明了III星族演化的双黑洞的总质量可以为$\sim 150 \,M_{\odot}$，这与LIGO/Virgo最近发现的GW190521双黑洞的质量一致。这类双黑洞合并的事件率估计为0.13—0.66 $~{\rm yr^{-1}~Gpc^{-3}}$，与观测值0.02—0.43 $~{\rm yr^{-1}~Gpc^{-3}}$一致。

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Formation of binary black holes similar to GW190521 with a total mass of ∼150 M⊙ from Population III binary star evolution

In case of zero metal (population III) stars, we show that total mass of binary black holes from binary population III star evolution can be $\sim 150 \,M_{\odot}$, which agrees with mass of a binary black hole, GW190521 recently discovered by LIGO/Virgo. The event rate of such binary black hole mergers is estimated as 0.13--0.66$~{\rm yr^{-1}~Gpc^{-3}}$, which is consistent with the observed value of 0.02--0.43$~{\rm yr^{-1}~Gpc^{-3}}$.

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arXiv: High Energy Astrophysical Phenomena

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