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Reconcile the AMS-02 positron fraction and Fermi-LAT/HESS total e(+/-) spectra by the primary electron spectrum hardening
Yuan, Qiang1,2; Bi, Xiao-Jun2
2013-11-01
Source PublicationPHYSICS LETTERS B
Volume727Issue:1-3Pages:1-7
AbstractThe recently reported positron fraction up to similar to 350 GeV by AMS-02 seems to have tension with the total electron/positron spectra detected by Fermi and HESS, for either pulsar or dark matter annihilation/decay scenario as the primary positron sources. In this work we will show that the tension will be removed by an adjustment of the primary electron spectrum. If the primary electron spectrum becomes harder above similar to 50 GeV, similar as the cosmic ray nuclei spectrum, the AMS-02 positron fraction and Fermi/HESS data can be well fitted by both the pulsar and dark matter models. This result may be suggestive of a common origin of the cosmic ray nuclei and the primary electrons. Furthermore, this study also implies that the properties of the extra sources derived from the fitting to the AMS-02 data should depend on the form of background. (C) 2013 Elsevier B.V. All rights reserved.
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.physletb.2013.10.010
WOS KeywordCOSMIC-RAY PROTON ; SUPERNOVA-REMNANTS ; SOLAR MODULATION ; HELIUM SPECTRA ; ORIGIN ; ENERGIES ; COMPONENT ; EXCESSES ; PULSAR ; GAMMA
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000328518400001
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15519
Collection中国科学院紫金山天文台研究生部_学生文章
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Qiang,Bi, Xiao-Jun. Reconcile the AMS-02 positron fraction and Fermi-LAT/HESS total e(+/-) spectra by the primary electron spectrum hardening[J]. PHYSICS LETTERS B,2013,727(1-3):1-7.
APA Yuan, Qiang,&Bi, Xiao-Jun.(2013).Reconcile the AMS-02 positron fraction and Fermi-LAT/HESS total e(+/-) spectra by the primary electron spectrum hardening.PHYSICS LETTERS B,727(1-3),1-7.
MLA Yuan, Qiang,et al."Reconcile the AMS-02 positron fraction and Fermi-LAT/HESS total e(+/-) spectra by the primary electron spectrum hardening".PHYSICS LETTERS B 727.1-3(2013):1-7.
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