它的长与短：双中子星和双星星系动力学的模拟
The long and the short of it: modelling double neutron star and collapsar Galactic dynamics
摘要：
这里介绍的工作检查人口的双紧凑的二进制系统和潮汐增强的双星。我们利用BINPOP和BINKIN，最近开发的人口综合软件包的两个组成部分。结果集中在二进制和空间进化的人口特征的相关性。脉冲星和长持续时间伽马射线暴观测与我们的模型一致使用，得出以下结论：双中子星双星可以在几百万年的时间尺度上迅速合并（远低于观测到的双中子星种群），这些模型中的共同包层演化是双中子星形成中非常重要的阶段，而观测到的长伽马射线暴投射距离比我们模拟的合并双中子星和双星星系群更集中。更好的协议被发现与矮星系模型，虽然结果是密切相关的假设出生径向分布。在我们的模型中，双中子星种群的诞生率范围为400万~ 1.6亿亿年，合并率范围为300万~ 1.5亿年。速率的上限和下限分别由电子俘获超新星踢向中子星和降低共包络效率引起。我们的双黑洞合并率表明，黑洞应该在出生时接受不对称的踢。
英文摘要：
The work presented here examines populations of double compact binary systems and tidally enhanced collapsars. We make use of BINPOP and BINKIN, two components of a recently developed population synthesis package. Results focus on correlations of both binary and spatial evolutionary population characteristics. Pulsar and long duration gamma-ray burst observations are used in concert with our models to draw the conclusions that: double neutron star binaries can merge rapidly on timescales of a few million years (much less than that found for the observed double neutron star population), common envelope evolution within these models is a very important phase in double neutron star formation, and observations of long gamma-ray burst projected distances are more centrally concentrated than our simulated coalescing double neutron star and collapsar Galactic populations. Better agreement is found with dwarf galaxy models although the outcome is strongly linked to the assumed birth radial distribution. The birth rate of the double neutron star population in our models range from 4-160 Myr^-1 and the merger rate ranges from 3-150 Myr^-1. The upper and lower limits of the rates results from including electron capture supernova kicks to neutron stars and decreasing the common envelope efficiency respectively. Our double black hole merger rates suggest that black holes should receive an asymmetric kick at birth.
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