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An excess of cosmic ray electrons at energies of 300-800 GeV
Chang, J.2,3; Adams, J. H., Jr.4; Ahn, H. S.5; Bashindzhagyan, G. L.6; Christl, M.4; Ganel, O.5; Guzik, T. G.1; Isbert, J.1; Kim, K. C.5; Kuznetsov, E. N.6; Panasyuk, M. I.6; Panov, A. D.6; Schmidt, W. K. H.3; Seo, E. S.5; Sokolskaya, N. V.6; Watts, J. W.4; Wefel, J. P.1; Wu, J.5; Zatsepin, V. I.6
2008-11-20
发表期刊NATURE
ISSN0028-0836
卷号456期号:7220页码:362-365
摘要Galactic cosmic rays consist of protons, electrons and ions, most of which are believed to be accelerated to relativistic speeds in supernova remnants(1-3). All components of the cosmic rays show an intensity that decreases as a power law with increasing energy ( for example as E 22.7). Electrons in particular lose energy rapidly through synchrotron and inverse Compton processes, resulting in a relatively short lifetime ( about 10 5 years) and a rapidly falling intensity, which raises the possibility of seeing the contribution from individual nearby sources ( less than one kiloparsec away)(4). Here we report an excess of galactic cosmic- ray electrons at energies of,300 - 800 GeV, which indicates a nearby source of energetic electrons. Such a source could be an unseen astrophysical object ( such as a pulsar(5) or micro-quasar(6)) that accelerates electrons to those energies, or the electrons could arise from the annihilation of dark matter particles ( such as a Kaluza-Klein particle(7) with a mass of about 620 GeV).
文章类型Article
关键词Supernova Remnant Spectrum Particle
WOS标题词Science & Technology
学科领域Science & Technology - Other Topics
DOI10.1038/nature07477
关键词[WOS]SUPERNOVA REMNANT ; SPECTRUM ; PARTICLE
收录类别SCI
语种英语
WOS研究方向Science & Technology - Other Topics
WOS类目Multidisciplinary Sciences
WOS记录号WOS:000261039600037
引用统计
文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/1761
专题暗物质和空间天文实验室
作者单位1.Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
2.CAS, Purple Mt Observ, Nanjing 210008, Peoples R China
3.Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany
4.NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA
5.Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA
6.Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia
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Chang, J.,Adams, J. H., Jr.,Ahn, H. S.,et al. An excess of cosmic ray electrons at energies of 300-800 GeV[J]. NATURE,2008,456(7220):362-365.
APA Chang, J..,Adams, J. H., Jr..,Ahn, H. S..,Bashindzhagyan, G. L..,Christl, M..,...&Zatsepin, V. I..(2008).An excess of cosmic ray electrons at energies of 300-800 GeV.NATURE,456(7220),362-365.
MLA Chang, J.,et al."An excess of cosmic ray electrons at energies of 300-800 GeV".NATURE 456.7220(2008):362-365.
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