Quantitative study of the AMS-02 electron/positron spectra: Implications for pulsars and dark matter properties

doi:10.1103/PhysRevD.91.063508

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	Quantitative study of the AMS-02 electron/positron spectra: Implications for pulsars and dark matter properties
	Lin SJ(林苏杰); Yuan Q(袁强); Bi XJ(毕效军); Lin, SJ; Yuan, Q; Bi, XJ
	2015
发表期刊	PHYSICAL REVIEW D
卷号	91 期号:6 页码:63508
通讯作者	林苏杰
文章类型	Article
摘要	The Alpha Magnetic Spectrometer (AMS-02) has just published the unprecedentedly precise measurement of the cosmic electron and positron spectra. In this paper, we try to give a quantitative study on the AMS-02 results by a global fitting to the electron and positron spectra, together with the updated positron fraction data. The Markov chain Monte Carlo algorithm is adopted to do the fitting. The primary electron spectrum and the parameters for pulsars or dark matter that contribute extra positrons are determined simultaneously. We find that there is a hardening of the primary electron spectrum at similar to 60 GeV. With such a new feature at the background spectrum, both the pulsars and dark matter can explain the AMS-02 results very well. The dark matter scenario shows a drop at the positron fraction at similar to 300 GeV but suffers very strong constraints from Fermi gamma-ray observations. The fitting results also suggest that the propagation model with convection may be more favored by the lepton data than the reacceleration model.
学科领域	Astronomy & Astrophysics; Physics
DOI	10.1103/PhysRevD.91.063508
收录类别	SCI ; CA
WOS类目	Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号	WOS:000350848500002
引用统计
文献类型	期刊论文
条目标识符	http://ir.ihep.ac.cn/handle/311005/228238
专题	粒子天体物理中心
推荐引用方式 GB/T 7714	Lin SJ,Yuan Q,Bi XJ,et al. Quantitative study of the AMS-02 electron/positron spectra: Implications for pulsars and dark matter properties[J]. PHYSICAL REVIEW D,2015,91(6):63508.
APA	林苏杰,袁强,毕效军,Lin, SJ,Yuan, Q,&Bi, XJ.(2015).Quantitative study of the AMS-02 electron/positron spectra: Implications for pulsars and dark matter properties.PHYSICAL REVIEW D,91(6),63508.
MLA	林苏杰,et al."Quantitative study of the AMS-02 electron/positron spectra: Implications for pulsars and dark matter properties".PHYSICAL REVIEW D 91.6(2015):63508.

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