IHEP OpenIR  > 粒子天体物理中心
Implications of the AMS-02 positron fraction in cosmic rays
Yuan Q(袁强); Bi XJ(毕效军); Chen GM(陈国明); Guo YQ(郭义庆); Lin SJ(林苏杰); Zhang XM(张新民); Yuan, Q; Bi, XJ; Chen, GM; Guo, YQ; Lin, SJ; Zhang, XM
2015
发表期刊ASTROPARTICLE PHYSICS
卷号60页码:1-12
通讯作者毕效军
文章类型Article
摘要The AMS-02 collaboration has just released its first result of the cosmic positron fraction e(+)/(e(-) + e(+)) with high precision up to similar to 350 GeV. The AMS-02 result shows the same trend with the previous PAMELA result, which requires extra electron/positron sources on top of the conventional cosmic ray background, either from astrophysical sources or from dark matter annihilation/decay. In this paper we try to figure out the nature of the extra sources by fitting to the AMS-02 e(+)/(e(-) + e(+)) data, as well as the electron and proton spectra by PAMELA and the (e(-) + e(+)) spectrum by Fermi and HESS. We adopt the GALPROP package to calculate the propagation of the Galactic cosmic rays and the Markov Chain Monte Carlo sampler to do the fit. We find that under the conventional assumptions about the background and the extra source of the e(-) + e(+), we cannot fit the AMS-02 and Fermi/HESS data well simultaneously. The AMS-02 data require less electrons/positrons from the extra sources than that required by Fermi/HESS. It may indicate that the model needs to be refined or the data between these experiments have systematic uncertainties. The pulsar scenario generally fits the data better than the DM scenario. Furthermore, the constraints from gamma-rays also disfavor the DM scenario to explain the cosmic ray lepton data. (C) 2014 Elsevier B.V. All rights reserved.
关键词Positron fraction Dark matter AMS02 Pulsar
学科领域Astronomy & Astrophysics; Physics
DOI10.1016/j.astropartphys.2014.05.005
收录类别SCI ; EI
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000343344700001
引用统计
被引频次:29[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/311005/228214
专题粒子天体物理中心
推荐引用方式
GB/T 7714
Yuan Q,Bi XJ,Chen GM,et al. Implications of the AMS-02 positron fraction in cosmic rays[J]. ASTROPARTICLE PHYSICS,2015,60:1-12.
APA 袁强.,毕效军.,陈国明.,郭义庆.,林苏杰.,...&Zhang, XM.(2015).Implications of the AMS-02 positron fraction in cosmic rays.ASTROPARTICLE PHYSICS,60,1-12.
MLA 袁强,et al."Implications of the AMS-02 positron fraction in cosmic rays".ASTROPARTICLE PHYSICS 60(2015):1-12.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
146.pdf(1507KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[袁强]的文章
[毕效军]的文章
[陈国明]的文章
百度学术
百度学术中相似的文章
[袁强]的文章
[毕效军]的文章
[陈国明]的文章
必应学术
必应学术中相似的文章
[袁强]的文章
[毕效军]的文章
[陈国明]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。