THE DIFFUSE GeV-TeV gamma-RAY EMISSION OF THE CYGNUS REGION
Bi XJ(毕效军); Wang Y(汪越); 袁强Bi, XJ; Chen, TL; Wang, Y; Yuan, Q
刊名ASTROPHYSICAL JOURNAL
2009
卷号695期号:2页码:883-887
关键词acceleration of particles cosmic rays ISM: general gamma rays: theory
学科分类Astronomy & Astrophysics
DOI10.1088/0004-637X/695/2/883
通讯作者[Bi, Xiao-Jun ; Wang, Yue ; Yuan, Qiang] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Bi, Xiao-Jun] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China ; [Chen, Tian-Lu ; Yuan, Qiang] Minist Educ, Key Lab Cosm Rays, Lhasa 850000, Peoples R China ; [Chen, Tian-Lu] Tibet Univ, Sch Sci, Dept Phys, Lhasa 850000, Peoples R China
文章类型Article
英文摘要Recently the Milagro experiment observed diffuse multi-TeV gamma ray emission in the Cygnus region, which is significantly stronger than what is predicted by the Galactic cosmic ray model. However, the sub-GeV observation by EGRET shows no excess to the prediction based on the same model. This TeV excess implies possible high-energy cosmic rays populated in the region with harder spectrum than that observed on the Earth. In the work we studied this theoretical speculation in detail. We find that, a diffuse proton source with power index alpha(p) less than or similar to 2.3, or a diffuse electron source with power index alpha(e) less than or similar to 2.6 can reproduce the Milagro's observation without conflicting with the EGRET data. Further detections on neutrinos, a diagnostic of the hadronic model, and hard X-ray synchrontron radiation, a diagnostic of the lepton model, help to break this degeneracy. In combination with the gamma ray observations to several hundred GeV by Fermi, we will be able to understand the diffuse emission mechanisms in the Cygnus region better.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000265018300010
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被引频次:4[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/311005/238676
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
作者单位中国科学院高能物理研究所
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Bi XJ,Wang Y,袁强Bi, XJ,et al. THE DIFFUSE GeV-TeV gamma-RAY EMISSION OF THE CYGNUS REGION[J]. ASTROPHYSICAL JOURNAL,2009,695(2):883-887.
APA 毕效军,汪越,袁强Bi, XJ,Chen, TL,Wang, Y,&Yuan, Q.(2009).THE DIFFUSE GeV-TeV gamma-RAY EMISSION OF THE CYGNUS REGION.ASTROPHYSICAL JOURNAL,695(2),883-887.
MLA 毕效军,et al."THE DIFFUSE GeV-TeV gamma-RAY EMISSION OF THE CYGNUS REGION".ASTROPHYSICAL JOURNAL 695.2(2009):883-887.
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