Impact of a nearby subhalo on the constraint of dark matter annihilation from cosmic ray antiprotons  

作　　者：赵熠 毕效军 林苏杰 殷鹏飞 Yi Zhao;Xiao-Jun Bi;Su-Jie Lin;Peng-Fei Yin(College of Physics and Materials Science,Tianjin Normal University,Tianjin 300387,China;Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Zhuhai Campus of Sun Yat-Sen University,Sun Yat-Sen University,Zhuhai 519082,China)

机构地区：[1]College of Physics and Materials Science,Tianjin Normal University,Tianjin 300387,China [2]Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [3]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]Zhuhai Campus of Sun Yat-Sen University,Sun Yat-Sen University,Zhuhai 519082,China

出　　处：《Chinese Physics C》2024年第2期175-182,共8页中国物理C（英文版）

基　　金：Supported by the Science&Technology Development Fund of Tianjin Education Commission for Higher Education(2020KJ003)。

摘　　要：Numerous simulations indicate that a large number of subhalos should be hosted by the Milky Way.The potential existence of a nearby subhalo could have important implications for our understanding of dark matter(DM)annihilation.In this study,we investigate the hypothetical presence of a nearby subhalo and set the upper limits on the DM annihilation cross section by analyzing the cosmic-ray antiproton spectrum.By presenting the ratios of annihilation cross section limits for scenarios with and without a nearby subhalo,we can quantitatively evaluate the potential impact of the nearby subhalo on the limits of the DM annihilation cross section.The impacts of the concentration model and the subhalo probability distribution have been considered.We explore the antiproton contribution of the potential nearby DM subhalo accounting for the DAMPE e+spectrum at~1.4 TeV and find that the current AMS-02 antiproton results do not limit this contribution.

关 键 词：dark matter ANTIPROTON subhalo 

分 类 号：P145.9[天文地球—天体物理]