双星系统中弱相互作用大质量粒子的俘获率
Capture rate of weakly interacting massive particles (WIMPs) in binary star systems
摘要：
星系内部的暗物质（DM）分布是不均匀的。靠近中心区域，其密度最高。因此，我们可以合理地假设，在星系内部，DM对中心区域恒星物理的影响大于外部区域。此外，目前的恒星演化模型在假设中没有考虑DM效应。为了考虑DM效应，首先必须估计一颗恒星包含多少DM。个别恒星对DM粒子的捕获率（CR）已经在文献中进行了研究。在这项工作中，我们讨论了当恒星是双星系统（BSS）的成员时，CR如何受到影响（而不是单独研究它们）。当一颗恒星是BSS的成员时，由于围绕伴星的椭圆运动，它的速度会周期性地变化。在这项工作中，我们研究了CR BSS在不同的BSS配置。最后，我们讨论了可以归因于BSS中DM效应的观测特征。
英文摘要：
The distribution of dark matter (DM) inside galaxies is not uniform. Near the central regions, its density is the highest. Then, it is logical to suppose that, inside galaxies, DM affects the physics of stars in central regions more than outer regions. Besides, current stellar evolutionary models did not consider DM effects in their assumptions. To consider the DM effects, at first one must estimate how much DM a star contains. The capture rate (CR) of DM particles by individual stars was investigated already in the literature. In this work, we discuss how CR can be affected when stars are members of binary star systems (BSS) (instead of studying them individually). When a star is a member of a BSS, its speed changes periodically due to the elliptical motion around its companion star. In this work, we investigated CR by BSSs in different BSS configurations. In the end, we discussed observational signatures that can be attributed to the DM effects in BSSs.
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