Discriminating different scenarios to account for the cosmic e(+/-) excess by synchrotron and inverse Compton radiation

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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
刊名	PHYSICAL REVIEW D
	2009
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
英文摘要	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.
学科主题	Astronomy & Astrophysics; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]	Astronomy & Astrophysics ; Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000268618800009
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240489]
专题	高能物理研究所_粒子天体物理中心高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	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.