论文标题
第一颗星残余物的chirp质量和二进制黑洞的旋转
Chirp Mass and Spin of Binary Black Holes from First Star Remnants
论文作者
论文摘要
我们通过对七个不同模型的种群合成模拟进行了种群III（POP III）二进制进化。我们发现流行III二进制文件倾向于用chirp质量$ m _ {\ rm chirp} \ sim 30〜M _ {\ odot} $，它们可以在漫长的合并时间时在现在合并。 POP III BBHS的合并率密度在$ z = 0 $范围3.34---21.2 $ \ rm/yr/yr/gpc^3 $，这与aligo/avirgo的9.7--101 $ \ rm/yr/yr/gpc^3 $一致。这些流行III二进制物可能会导致Aligo/Avirgo检测到的大量BBH重力波（GW）的某些部分。我们还计算了POP III BBH合并的红移依赖性。我们发现POP III低自旋BBH倾向于在低红移时合并，而Pop III高自旋BBH在高红移时可以通过，可以通过ET，CE和Decigo等未来的GW探测器来确认。这些探测器还可以检查BBH合并率和自旋分布的红移依赖性。我们的结果表明，除一种型号外，平均有效的自旋$ \ weft \langleχ_ {\ rm eff} \ right \ rangle $ at $ z = 0 $ h $ z = 0 $ ranges $ 0.02 $ - $ 0.3 $ - $ z = 10 $ it $ 0.16 $ $ 0.64 $ 0.64美元。因此，GWS大量的恒星质量BBH检测将是早期宇宙中恒星进化研究的关键。
We performed Population III (Pop III) binary evolution by using population synthesis simulations for seven different models. We found that Pop III binaries tend to be binary black holes (BBHs) with chirp mass $M_{\rm chirp} \sim 30~M_{\odot}$ and they can merge at present day due to long merger time. The merger rate densities of Pop III BBHs at $z=0$ ranges 3.34--21.2 $\rm /yr/Gpc^3$ which is consistent with the aLIGO/aVIRGO result of 9.7--101 $\rm /yr/Gpc^3$. These Pop III binaries might contribute to some part of the massive BBH gravitational wave (GW) sources detected by aLIGO/aVIRGO. We also calculated the redshift dependence of Pop III BBH mergers. We found that Pop III low spin BBHs tend to merge at low redshift, while Pop III high spin BBHs do at high redshift, which can be confirmed by future GW detectors such as ET, CE, and DECIGO. These detectors can also check the redshift dependence of BBH merger rate and spin distribution. Our results show that except for one model, the mean effective spin $\left\langle χ_{\rm eff} \right\rangle$ at $z=0$ ranges $0.02$--$0.3$ while at $z=10$ it does $0.16$--$0.64$. Therefore, massive stellar-mass BBH detection by GWs will be a key for the stellar evolution study in the early universe.
