Hadronic gamma-ray emission from molecular clouds overtaken by supernova remnants
Fang, Jun1,2; Zhang, Li1; Fang, J (reprint author), Yunnan Univ, Dept Phys, Kunming, Peoples R China.
发表期刊NEW ASTRONOMY
2013-01
卷号18页码: 35-41
DOI10.1016/j.newast.2012.06.001
收录类别SCI
关键词Gamma Rays: Ism-ism: Supernova Remnants
摘要A model is proposed to describe the high-energy gamma-ray emission from a supernova remnant (SNR) interacting with a dense molecular cloud (MC). In this model, a shock with a low Alfven Mach number can be produced when a part of a SNR shell drives into a dense MC, and then the proton spectrum in the test-particle case with the Alfven drift is much softer than that for strong shocks; the gamma-rays produced via inelastic proton-proton (pp) interaction from the SNR can be greatly enhanced. The model is applied to the five GeV-bright SNRs IC443, W51C, W44, W498, and W28 which are known to be interacting with MCs. The gamma-ray spectra of these SNRs can be reproduced as the pp interaction from the MCs overtaken by the SNR shocks within the test-particle diffusive shock acceleration regime. For the five SNRs, the spectral breaks around several GeV detected with the Fermi LAT are due to the softness of the energy distributions of the protons accelerated in the SNR shells with low Alfven Mach numbers. (C) 2012 Elsevier B.V. All rights reserved.
项目资助者National Natural Science Foundation of China, Yunnan Province(NSFC,11103016,2011FB012) ; Foundation of Yunnan University(XT412003,2010YB043) ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences(OP201101)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
WOS记录号WOS:000310104400007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MULTIBAND NONTHERMAL EMISSION ; LARGE-AREA TELESCOPE ; SNR RX J1713.7-3946 ; COSMIC-RAYS ; IC 443 ; DIFFUSIVE ACCELERATION ; PARTICLE-ACCELERATION ; SHOCK ACCELERATION ; OBLIQUE SHOCKS ; FERMI-LAT
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9412
专题中国科学院天体结构与演化重点实验室
通讯作者Fang, J (reprint author), Yunnan Univ, Dept Phys, Kunming, Peoples R China.
作者单位1.Department of Physics, Yunnan University, Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
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Fang, Jun,Zhang, Li,Fang, J . Hadronic gamma-ray emission from molecular clouds overtaken by supernova remnants[J]. NEW ASTRONOMY,2013,18: 35-41.
APA Fang, Jun,Zhang, Li,&Fang, J .(2013).Hadronic gamma-ray emission from molecular clouds overtaken by supernova remnants.NEW ASTRONOMY,18, 35-41.
MLA Fang, Jun,et al."Hadronic gamma-ray emission from molecular clouds overtaken by supernova remnants".NEW ASTRONOMY 18(2013): 35-41.
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