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Discriminating different scenarios to account for the cosmic e(+/-) excess by synchrotron and inverse Compton radiation
Zhang J(张娟); Bi XJ(毕效军); Yuan Q(袁强); Zhang, J; Bi, XJ; Liu, J; Liu, SM; Yin, PF; Yuan, Q; Zhu, SH
2009
发表期刊PHYSICAL REVIEW D
卷号80期号:2页码:23007
通讯作者[Zhang, Juan ; Bi, Xiao-Jun ; Yuan, Qiang] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Bi, Xiao-Jun] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China ; [Liu, Jia ; Yin, Peng-Fei ; Zhu, Shou-Hua] Peking Univ, Inst Theoret Phys, Beijing 100871, Peoples R China ; [Liu, Jia ; Yin, Peng-Fei ; Zhu, Shou-Hua] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China ; [Liu, Si-Ming] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
摘要The excesses of the cosmic positron fraction recently measured by PAMELA and the electron spectra by ATIC, PPB-BETS, Fermi, and H.E.S.S. indicate the existence of primary electron and positron sources. The possible explanations include dark matter annihilation, decay, and astrophysical origin, like pulsars. In this work we show that these three scenarios can all explain the experimental results of the cosmic e(+/-) excess. However, it may be difficult to discriminate these different scenarios by the local measurements of electrons and positrons. We propose possible discriminations among these scenarios through the synchrotron and inverse Compton radiation of the primary electrons/positrons from the region close to the Galactic center. Taking typical configurations, we find the three scenarios predict quite different spectra and skymaps of the synchrotron and inverse Compton radiation, though there are relatively large uncertainties. The most prominent differences come from the energy band 10(4)similar to 10(9) MHz for synchrotron emission and greater than or similar to 10 GeV for inverse Compton emission. It might be able to discriminate at least the annihilating dark matter scenario from the other two given the high precision synchrotron and diffuse gamma-ray skymaps in the future.
文章类型Article
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.80.023007
研究领域[WOS]Astronomy & Astrophysics ; Physics
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语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000268618800009
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被引频次:60[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240489
专题粒子天体物理中心
实验物理中心
中国科学院高能物理研究所_中国散裂中子源
作者单位中国科学院高能物理研究所
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Zhang J,Bi XJ,Yuan Q,et al. Discriminating different scenarios to account for the cosmic e(+/-) excess by synchrotron and inverse Compton radiation[J]. PHYSICAL REVIEW D,2009,80(2):23007.
APA 张娟.,毕效军.,袁强.,Zhang, J.,Bi, XJ.,...&Zhu, SH.(2009).Discriminating different scenarios to account for the cosmic e(+/-) excess by synchrotron and inverse Compton radiation.PHYSICAL REVIEW D,80(2),23007.
MLA 张娟,et al."Discriminating different scenarios to account for the cosmic e(+/-) excess by synchrotron and inverse Compton radiation".PHYSICAL REVIEW D 80.2(2009):23007.
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