论文标题
宇宙考古学，巨大的恒星黑洞二进制
Cosmic archaeology with massive stellar black hole binaries
论文作者
论文摘要
通过检测引力波（GW）事件GW150914的检测证明了大量恒星黑洞二进制（MBHB），并在第一个LIGO/CIDGO观察过程中（O1）和七个o2 Dotue of Gw new o gw new o g w nefips of the Practitational Wave（GW）事件GW150914，证明了原发性黑洞（BH）$ \ ge 31 \，m_ \ odot $。通过采用星系形成模型\ texttt {gamesh}与二元种群合成（BPS）计算相结合，我们在这里我们通过选择在质量和合并红移中兼容的模拟二进制文件来研究这些MBHB的起源。我们发现他们的宇宙出生率在红移范围内达到$ 6.5 \ leq Z \ leq 10 $，而不论采用的BPS如何。然后，这些MBHB是以低金属形成的旧系统（$ z \ sim [0.01-0.1] \，z {\ odot} $），低稳定的质量星系，在宇宙恢复结束之前，即显着超出了宇宙恒星形成的峰值。通过合并MBHB产生的GW信号开辟了新的可能性，以探测远程星系中恒星种群的性质，目前太微弱，无法通过可用的电磁设施检测到。
The existence of massive stellar black hole binaries (MBHBs), with primary black hole (BH) masses $\ge 31 \, M_\odot$, was proven by the detection of the gravitational wave (GW) event GW150914 during the first LIGO/Virgo observing run (O1), and successively confirmed by seven additional GW signals discovered in the O1 and O2 data. By adopting the galaxy formation model \texttt{GAMESH} coupled with binary population synthesis (BPS) calculations, here we investigate the origin of these MBHBs by selecting simulated binaries compatible in mass and coalescence redshifts. We find that their cosmic birth rates peak in the redshift range $6.5 \leq z \leq 10$, regardless of the adopted BPS. These MBHBs are then old systems forming in low-metallicity ($Z \sim [0.01-0.1] \, Z_{\odot}$), low-stellar-mass galaxies, before the end of cosmic reionization, i.e. significantly beyond the peak of cosmic star formation. GW signals generated by coalescing MBHBs open up new possibilities to probe the nature of stellar populations in remote galaxies, at present too faint to be detected by available electromagnetic facilities.
