典型文献
Geminga contribution to the cosmic-ray positron excess according to the gamma-ray observations
文献摘要：
We attempt to interpret the cosmic-ray positron excess by injection from the nearby pulsar Geminga,assuming a two-zone diffusion scenario and an injection spectrum with a low energy cutoff.Since the high energy positrons and electrons from Geminga can induce γ rays via inverse Compton scattering,we take into account the extended γ-ray observations around Geminga from HAWC for～10TeV and from Fermi-LAT for 0(10)GeV.According to the extended y-ray observation claimed by an analysis of Fermi-LAT data,we find that Geminga could explain the positron excess for a 30％energy conversion efficiency into positrons and electrons.However,based on the constraint on the extended γ rays given by another Fermi-LAT analysis,positrons from Geminga would be insufficient to account for the positron excess.Further robust analysis of Fermi-LAT data for the extended γ rays would be crucial to determine whether Geminga can explain the positron excess or not.
文献关键词：
中图分类号：
作者姓名：
Guang-Yao Zhou;Zhao-Huan Yu;Qiang Yuan;Hong-Hao Zhang
作者机构：
School of Physics,Sun Yat-Sen University,Guangzhou 510275,China;Key Laboratory of Dark Matter and Space Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China;School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China
文献出处：
引用格式：
[1]Guang-Yao Zhou;Zhao-Huan Yu;Qiang Yuan;Hong-Hao Zhang-.Geminga contribution to the cosmic-ray positron excess according to the gamma-ray observations)[J].理论物理,2022(10):89-95
A类：
Geminga,HAWC,10TeV
B类：
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AB值：
0.4168
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