FERMI LARGE AREA TELESCOPE DETECTION OF SUPERNOVA REMNANT RCW 86

被引：34
|
作者：
Yuan, Qiang [1 ,2 ]
Huang, Xiaoyuan [3 ]
Liu, Siming [3 ]
Zhang, Bing [2 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
[2] Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA
[3] Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2014年 / 785卷 / 02期
基金：
中国国家自然科学基金;
关键词：
cosmic rays; gamma rays: ISM; ISM: supernova remnants; radiation mechanisms: non-thermal; COSMIC-RAY ACCELERATION; WMAP OBSERVATIONS; EMISSION; DISCOVERY; LAT; SPECTROSCOPY; EFFICIENCY; SHELL;
D O I：
10.1088/2041-8205/785/2/L22
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Using 5.4 yr Fermi Large Area Telescope data, we report the detection of GeV. gamma- ray emission from the shell-type supernova remnant RCW 86 (G315.4-2.3) with a significance of similar to 5.1 sigma. The data slightly favors an extended emission of this supernova remnant. The spectral index of RCW 86 is found to be very hard, Gamma similar to 1.4, in the 0.4-300 GeV range. A one-zone leptonic model can well fit the multi-wavelength data from radio to very high energy gamma-rays. The very hard GeV gamma-ray spectrum and the inferred low gas density seem to disfavor a hadronic origin for the gamma-rays. The. - ray behavior of RCW 86 is very similar to several other TeV shell-type supernova remnants, e. g., RX J1713.7- 3946, RX J0852.0-4622, SN 1006, and HESS J1731-347.
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页数：5
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