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arXiv 1804.03409hep-ph
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自相互作用暗物质湮灭对中子星的再加热

Reheating neutron stars with the annihilation of self-interacting dark matter

Chian-Shu Chen, Yen-Hsun Lin

摘要:

像中子星(NS)这样的致密天体是捕获暗物质(DM)粒子的理想场所。我们研究了附近NS捕获的自相互作用DM(SIDM)的效果,NS可以通过吸收DM湮灭释放的能量将其重新加热到赞赏的表面温度。当DM-核子截面$σ_{χn}$足够小时,DM自相互作用将取代俘获过程,使被俘获的DM粒子数增加,同时使DM湮没率增加。由DM自相互作用产生的NS表面温度约为数百开尔文,并且可能被未来的红外望远镜探测到。这样的观察可以作为补充探针DM属性到目前的DM直接搜索。

英文摘要:

Compact stellar objects such as neutron stars (NS) are ideal places for capturing dark matter (DM) particles. We study the effect of self-interacting DM (SIDM) captured by nearby NS that can reheat it to an appreciated surface temperature through absorbing the energy released due to DM annihilation. When DM-nucleon cross section $σ_{χn}$ is small enough, DM self-interaction will take over the capture process and make the number of captured DM particles increased as well as the DM annihilation rate. The corresponding NS surface temperature resulted from DM self-interaction is about hundreds of Kelvin and is potentially detectable by the future infrared telescopes. Such observations could act as the complementary probe on DM properties to the current DM direct searches.

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