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
刊名PHYSICAL REVIEW D
2015
卷号91期号:6页码:63508
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.91.063508
通讯作者林苏杰
文章类型Article
英文摘要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.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI ; CA
WOS记录号WOS:000350848500002
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被引频次:33[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/311005/228238
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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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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