论文标题
VFTS 243如BPASS基准模型所预测
VFTS 243 as predicted by the BPASS fiducial models
论文作者
论文摘要
最近发现了VFTS中明确的静态BH和主要序列O星伴侣243为理论恒星进化的新约束打开了大门，并希望重现黑洞的祖细胞 - 黑洞二进制。在这里，我们表明二元人口和光谱合成基金模型（BPASSV2.2.1）原始预测类似于VFTS243的系统：我们发现，VFTS 243可能起源于大约15天轨道的二进制系统，主要质量为40至50 m $ $ $ _ {\ odot} $ n of 40至50 m $ _ {\ odot} $，最初的质量为24-25m $ $ _ {此外，我们发现主要恒星的死亡一定导致低能爆炸E <10 $^{50} $ergs。在统一之前，我们发现新出生的黑洞的踢速度<10 km/s。报道了VFTS 243的非常低的偏心率，作者随后的结论是，SN踢一定很小，这与从我们的数值模拟中与均匀的先验进行的数值模拟中发现的后验分布的峰保持一致。最后，在黑洞种群合成中常用的霍布斯踢分布减少了，这是强烈的分歧。
The recent discovery of an unambiguous quiescent BH and main sequence O star companion in VFTS 243 opens the door to new constraints on theoretical stellar evolution and population models looking to reproduce the progenitors of black hole - black hole binaries. Here we show that the Binary Population and Spectral Synthesis fiducial models (BPASSv2.2.1) natively predict VFTS243-like systems: We find that VFTS 243 likely originated from a binary system in a about 15 day orbit with primary mass ranging from 40 to 50 M$_{\odot}$ and secondary star with initial mass 24-25M$_{\odot}$. Additionally we find that the death of the primary star must have resulted in a low energy explosion E < 10$^{50}$ ergs.With a uniform prior we find that the kick velocity of the new-born black hole was <10 km/s. The very low eccentricity reported for VFTS 243 and the subsequent conclusion by the authors that the SN kick must have been very small is in line with the peak in the posterior distribution between 0 and 5 km/s found from our numerical simulations performed with a uniform prior. Finally, the reduced Hobbs kick distribution commonly used in black hole population synthesis is strongly disfavoured.
