Perspective of monochromatic gamma-ray line detection with the High Energy cosmic-Radiation Detection (HERD) facility onboard China’s space station

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• 作者：Xiaoyuan Huang ; ^a ; ^{xiaoyuan.huang@tum.de" class="auth_mail" title="E-mail the corresponding author} ; ^{huangxiaoyuan@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Anna S. Lamperstorfer ; ^a ; ^{anna.lamperstorfer@tum.de" class="auth_mail" title="E-mail the corresponding author} ; Yue-Lin Sming Tsai^b ; Ming Xu^c ; Qiang Yuan^d ; Jin Chang^e ; Yong-Wei Dong^c ; Bing-Liang Hu^f ; Jun-Guang Lü ; ^g ; Le Wang^f ; Bo-Bing Wu^c ; Shuang-Nan Zhang^c
• 关键词：Gamma ray line ; Dark matter ; MSSM
• 刊名：Astroparticle Physics
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：78
• 期：Complete
• 页码：35-42
• 全文大小：1185 K

文摘

HERD is the High Energy cosmic-Radiation Detection instrument proposed to operate onboard China’s space station in the 2020s. It is designed to detect energetic cosmic ray nuclei, leptons and photons with a high energy resolution ( ∼1% for electrons and photons and 20% for nuclei) and a large geometry factor (>3 m² sr for electrons and diffuse photons and > [2]m² sr for nuclei). In this work we discuss the capability of HERD to detect monochromatic γ-ray lines, based on simulations of the detector performance. It is shown that HERD will be one of the most sensitive instruments for monochromatic γ-ray searches at energies between ∼ 10 to a few hundred GeV. Above hundreds of GeV, Cherenkov telescopes will be more sensitive due to their large effective area. As a specific example, we show that a good portion of the parameter space of a supersymmetric dark matter model can be probed with HERD.