Constraining the primordial curvature perturbation using dark matter substructure
Constraining the primordial curvature perturbation using dark matter substructure
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使用暗物质子结构约束原初曲率扰动
DOI：
10.1103/physrevd.106.103014
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发表时间：
2022
影响因子：
5
通讯作者：
Ishiwata Koji
中科院分区：
文献类型：
--
作者：
Ando Shin’ichiro;Hiroshima Nagisa;Ishiwata Koji
我们通过对暗物质亚结构的观测来研究原初曲率的扰动。假设在波数的曲率扰动谱中有一个凸起，我们用半解析的方法跟踪了主晕和次晕的演化。考虑到可能的不确定性，在评估的潮汐剥离对subhalo增长的影响，我们发现了一个新的强大的约束曲率扰动与颠簸从我们的银河系中观测到的矮球状星系的数量和恒星流的观测。冲击振幅的上限为。此外，我们发现，这是至关重要的暗物质信号的间接检测的升压因子，是由于在目前的观测范围内允许的颠簸。
We investigate the primordial curvature perturbation by the observation of the dark matter substructure. Assuming a bump in the spectrum of the curvature perturbation in the wave number of, we track the evolution of the host halo and subhalos in a semianalytic way. Taking into account possible uncertainties in the evaluation of the tidal stripping effect on the subhalo growth, we find a new robust bound on the curvature perturbation with a bump from the number of observed dwarf spheroidal galaxies in our Galaxy and the observations of the stellar stream. The upper limit on the amplitude of the bump isfor. Furthermore, we find the boost factor, which is crucial for the indirect detection of dark matter signals, is up todue to the bump that is allowed in the current observational bounds.