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arXiv 2007.03890astro-ph.HEastro-ph.SR
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具有概率剩余质量和反冲处方的二元总体综合

Binary population synthesis with probabilistic remnant mass and kick prescriptions

Ilya Mandel, Bernhard Mueller, Jeff Riley, Selma E. de Mink, Alejandro Vigna-Gomez, Debatri Chattopadhyay

摘要:

我们报告的影响,紧凑的残余质量和踢大规模的二进制人口合成的概率处方。我们发现,这个处方填充之间的中子星和黑洞与低质量的黑洞假定的质量差距。然而,进化效应减少了具有低质量黑洞的X射线双星候选者的数量,这与观察到的样本中缺乏此类系统一致。我们进一步发现,这个处方是符合形成较重的双中子星,如GW 190425,但过度预测银河系双中子星的质量。修正后的出生踢,特别是增加超剥离超新星踢,不能直接解释所观察到的银河系双中子星轨道周期-偏心率分布。最后,这一处方允许形成类似于最近发现的极端质量比二进制GW 190814的系统,但只有当我们允许生存的二进制文件中的共同信封是由捐助者开始穿越赫兹斯普林间隙,相反,我们的标准模型。

英文摘要:

We report on the impact of a probabilistic prescription for compact remnant masses and kicks on massive binary population synthesis. We find that this prescription populates the putative mass gap between neutron stars and black holes with low-mass black holes. However, evolutionary effects reduce the number of X-ray binary candidates with low-mass black holes, consistent with the dearth of such systems in the observed sample. We further find that this prescription is consistent with the formation of heavier binary neutron stars such as GW190425, but over-predicts the masses of Galactic double neutron stars. The revised natal kicks, particularly increased ultra-stripped supernova kicks, do not directly explain the observed Galactic double neutron star orbital period--eccentricity distribution. Finally, this prescription allows for the formation of systems similar to the recently discovered extreme mass ratio binary GW190814, but only if we allow for the survival of binaries in which the common envelope is initiated by a donor crossing the Hertzsprung gap, contrary to our standard model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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