| 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
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| 2015
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发表期刊 | PHYSICAL REVIEW D
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卷号 | 91期号:6页码:63508 |
通讯作者 | 林苏杰
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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. |
文章类型 | Article
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学科领域 | Astronomy & Astrophysics; Physics
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DOI | 10.1103/PhysRevD.91.063508
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收录类别 | SCI
; CA
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WOS类目 | Astronomy & Astrophysics
; Physics, Particles & Fields
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WOS记录号 | WOS:000350848500002
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引用统计 |
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文献类型 | 期刊论文
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条目标识符 | http://ir.ihep.ac.cn/handle/311005/228238
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专题 | 粒子天体物理中心
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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.
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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.
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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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