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arXiv 2209.09252astro-ph.HEgr-qc
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对孤立脉冲星观测的中子星出生反冲速度的校准

Calibration of neutron star natal kick velocities to isolated pulsar observations

Veome Kapil, Ilya Mandel, Emanuele Berti, Bernhard Müller

摘要:

目前的处方超新星出生踢快速二进制人口合成模拟的基础上,适合简单的功能,单脉冲星速度数据。我们探讨了一个新的参数化的出生踢收到的中子星在孤立的和由Mandel和Müller开发的二元系统,这是基于一维和三维超新星模拟和占祖属性,残余质量和踢速度之间的物理相关性。我们约束两个自由参数在这个模型中使用很长的基线干涉测量速度测量的银河系单星系。我们发现,推断值的出生踢参数没有显着不同的单一和二元演化方案。这些参数的最佳拟合值是$v_{\rm ns} = 520$ km s $^{-1}$的缩放前因子的中子星踢,和$σ_{\rm ns}=0.3$的分数随机散射的踢速度。

英文摘要:

Current prescriptions for supernova natal kicks in rapid binary population synthesis simulations are based on fits of simple functions to single pulsar velocity data. We explore a new parameterization of natal kicks received by neutron stars in isolated and binary systems developed by Mandel & Müller, which is based on 1D and 3D supernova simulations and accounts for the physical correlations between progenitor properties, remnant mass, and the kick velocity. We constrain two free parameters in this model using very long baseline interferometry velocity measurements of Galactic single pulsars. We find that the inferred values of natal kick parameters do not differ significantly between single and binary evolution scenarios. The best-fit values of these parameters are $v_{\rm ns} = 520$ km s$^{-1}$ for the scaling pre-factor for neutron star kicks, and $σ_{\rm ns}=0.3$ for the fractional stochastic scatter in the kick velocities.

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