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On the hadronic gamma-ray emission from Tycho's supernova remnant
Zhang, Xiao1; Chen, Yang1,2; Li, Hui1,4; Zhou, Xin2,3,5
2013-02-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume429Issue:1Pages:L25-L29
Corresponding AuthorZhang, X (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China. Email: ygchen@nju.edu.cn
AbstractHadronic gamma-ray emission from supernova remnants (SNRs) is an important tool to test shock acceleration of cosmic-ray protons. Tycho is one of nearly a dozen Galactic SNRs which are suggested to emit hadronic gamma-ray emission. Among them, however, it is the only one in which the hadronic emission is proposed to arise from the interaction with a low-density (similar to 0.3 cm(-3)) ambient medium. Here we present an alternative hadronic explanation with a modest energy conversion efficiency (of the order of 1 per cent) for this young remnant. With such an efficiency, a normal electron-to-proton ratio (of the order of 10(-2)) is derived from the radio and X-ray synchrotron spectra, and an average ambient density that is at least one order of magnitude higher is derived from the hadronic gamma-ray flux. This result is consistent with the multiband evidence of the presence of a dense medium from the north to the east of the Tycho SNR. The SNR-cloud association, in combination with the H I absorption data, helps to constrain the so-far controversial distance to Tycho and leads to an estimate of 2.5 kpc.
KeywordRadiation Mechanisms: Non-thermal Ism: Individual Objects: Tycho Ism: Supernova Remnants Gamma-rays: Ism
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnrasl/sls016
WOS KeywordDIFFUSIVE SHOCK ACCELERATION ; MOLECULAR CLOUDS ; INTERSTELLAR-MEDIUM ; RX J1713.7-3946 ; MAGNETIC-FIELD ; COSMIC-RAYS ; SN 1572 ; IA ; CASSIOPEIA ; DISCOVERY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000318238300006
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9856
Collection太阳高能及相关物理过程研究团组
Affiliation1.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
3.Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
4.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
5.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xiao,Chen, Yang,Li, Hui,et al. On the hadronic gamma-ray emission from Tycho's supernova remnant[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,429(1):L25-L29.
APA Zhang, Xiao,Chen, Yang,Li, Hui,&Zhou, Xin.(2013).On the hadronic gamma-ray emission from Tycho's supernova remnant.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,429(1),L25-L29.
MLA Zhang, Xiao,et al."On the hadronic gamma-ray emission from Tycho's supernova remnant".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 429.1(2013):L25-L29.
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