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题名: Limits on dark matter annihilation cross sections to gamma-ray lines with subhalo distributions in N-body simulations and Fermi LAT data
作者: Liang, Yun-Feng; Xia, Zi-Qing; Duan, Kai-Kai; Shen, Zhao-Qiang; Li, Xiang; Fan, Yi-Zhong
刊名: PHYSICAL REVIEW D
出版日期: 2017
卷号: 95, 期号:6, 页码:63531-
英文摘要: In this work, we simulate a set of realizations of the local volume dark matter subhalo population based on the distributions and relations derived from Via Lactea II N-body simulation. We calculate the J-factors of these subhalos, and find that the low mass subhalos contribute a lot to the total J-factors. Combining with 91 months of the Fermi LAT observation, we constrain on the cross section of dark matter annihilating directly to two gamma rays. This is the first work combining numerical simulation results and Fermi LAT observations to constrain the dark matter cross section to the gamma-ray line with the subhalo population. Though the constraints derived from the subhalo population are weaker than those from the Fermi LAT observation of the Galactic center, they are supportive of and complementary to these other results.
语种: 英语
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17457
Appears in Collections:中国科学院紫金山天文台研究生部_学生文章

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