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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
Source PublicationPHYSICAL REVIEW D
ISSN1550-7998
EISSN1550-2368
Volume91Issue:6Pages:63508
Corresponding Author林苏杰
SubtypeArticle
AbstractThe 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.
Subject AreaAstronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.91.063508
Indexed BySCI ; INSPIREHEP ; ADS ; CA
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics, Particles & Fields
WOS SubjectAstronomy & Astrophysics ; Physics
WOS IDWOS:000350848500002
ADS Bibcode2015PhRvD..91f3508L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2015PhRvD..91f3508L
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2015PhRvD..91f3508L/citations
inspireid1318455
inspireURLhttps://inspirehep.net/literature/1318455
Citation statistics
Cited Times:79 [INSPIRE]
Cited Times:79 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/228238
Collection粒子天体物理中心
Recommended Citation
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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