YNAO OpenIR  > 中国科学院天体结构与演化重点实验室
Hadronic gamma-ray emission from molecular clouds overtaken by supernova remnants
Fang, Jun1,2; Zhang, Li1
Source PublicationNEW ASTRONOMY
2013-01
Volume18Pages: 35-41
DOI10.1016/j.newast.2012.06.001
Indexed BySCI
KeywordGamma Rays: Ism-ism: Supernova Remnants
Abstract

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.

Funding ProjectNational Natural Science Foundation of China, Yunnan Province[NSFC 11103016] ; National Natural Science Foundation of China, Yunnan Province[2011FB012] ; Foundation of Yunnan University[XT412003] ; Foundation of Yunnan University[2010YB043] ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP201101]
Funding OrganizationNational 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]
Language英语
Subject Area天文学 ; 星系与宇宙学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
WOS IDWOS:000310104400007
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordMULTIBAND NONTHERMAL EMISSION ; LARGE-AREA TELESCOPE ; SNR RX J1713.7-3946 ; COSMIC-RAYS ; IC 443 ; DIFFUSIVE ACCELERATION ; PARTICLE-ACCELERATION ; SHOCK ACCELERATION ; OBLIQUE SHOCKS ; FERMI-LAT
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9412
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorFang, Jun
Affiliation1.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
Recommended Citation
GB/T 7714
Fang, Jun,Zhang, Li. Hadronic gamma-ray emission from molecular clouds overtaken by supernova remnants[J]. NEW ASTRONOMY,2013,18: 35-41.
APA Fang, Jun,&Zhang, Li.(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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