论文标题
探测暗物质的自我交流
Probing Dark Matter Self-interaction with Ultra-faint Dwarf Galaxies
论文作者
论文摘要
自我互动暗物质（SIDM）已引起人们越来越多的关注，作为解决无碰撞冷暗物质（DM）的小规模问题的一种解决方案。我们使用现象学SIDM Halo模型的23个超品种（UFD）星系的恒星运动学研究了SIDM。 UFD是DM主导的，并且恒星形成历史记录较少。因此，它们是测试SIDM的理想对象，因为它们的光晕曲线受到重型反馈过程的影响最小。我们没有发现UFD偏爱非零的自我互动，有些则在简单的SIDM建模中提供了严格的约束。我们的结果挑战了SIDM的简单建模，该建模敦促进一步研究SIDM的Subhalo动力学演化。
Self-interacting dark matter (SIDM) has gathered growing attention as a solution to the small scale problems of the collisionless cold dark matter (DM). We investigate the SIDM using stellar kinematics of 23 ultra-faint dwarf (UFD) galaxies with the phenomenological SIDM halo model. The UFDs are DM-dominated and have less active star formation history. Accordingly, they are the ideal objects to test the SIDM, as their halo profiles are least affected by the baryonic feedback processes. We found no UFDs favor non-zero self-interaction and some provide stringent constraints within the simple SIDM modeling. Our result challenges the simple modeling of the SIDM, which urges further investigation of the subhalo dynamical evolution of the SIDM.
