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arXiv 2007.13343astro-ph.HEastro-ph.SR
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从星族III星形成质量隙致密天体和黑洞双星

Formation of mass gap compact object and black hole binary from Population III stars

Tomoya Kinugawa, Takashi Nakamura, Hiroyuki Nakano

摘要:

对具有麦克斯韦反冲速度分布的星族III双星在形成质量为2- 5 $\,M_{\odot}$的质量隙致密天体(MGCO)时的星族合成进行了模拟。我们发现,对于$σ_{\rm k}=0$ -- $500$ km/s的八种反冲速度色散模型,黑洞(BH)-MGCO双星的平均质量为$\sim (30 \,M_\odot,\,2.6 \,M_\odot)$ .在我们的模拟数据中,我们发现了质量为$(22.9 \,M_\odot,\,2.5 \,M_\odot)$的BH-MGCO双星的存在,它看起来像GW 190814。

英文摘要:

We performed population synthesis simulations of Population III binary stars with Maxwellian kick velocity distribution when MGCOs (Mass Gap Compact Objects with mass 2--5$\,M_{\odot}$) are formed. We found that for eight kick velocity dispersion models of $σ_{\rm k}=0$--$500$ km/s, the mean mass of black hole (BH)-MGCO binary is $\sim (30 \,M_\odot,\,2.6 \,M_\odot)$. In numerical data of our simulations, we found the existence of BH-MGCO binary with mass $(22.9 \,M_\odot,\,2.5 \,M_\odot)$ which looks like GW190814.

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