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题名:
On the escape and propagation of high-energy protons near young supernova remnants
作者: Yang CY(杨初源)1,2; Zhang, Li3; Wang JC(王建成)1,2
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2015-04-21
卷号: 448, 期号:4, 页码:3423-3428
DOI: 10.1093/mnras/stv255
学科分类: Astronomy & Astrophysics
产权排序: 第1完成单位
收录类别: SCI
通讯作者: Yang, CY (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
关键词: acceleration of particles ; ISM: clouds ; cosmic rays ; ISM: supernova remnants
英文摘要: The escape and propagation of high-energy protons near young supernova remnants (SNRs) are investigated in the frame of non-linear diffusive shock acceleration (NLDSA) model by using two methods. In the first method, the particle diffusion is assumed to be different inside and outside the absorbing boundary of the particles accelerated in the SNR shock, and the proton spectra at a given distance of the outer region and corresponding pi(0) decay gamma-ray spectra can be calculated if a molecular cloud is assumed to be at the distance. In the second method, the total spectrum of high-energy protons escaping from an absorbing boundary during the SNR evolution time is treated as injection rate of the protons and the proton spectrum is calculated in the accumulative diffusion model. Our results show that (1) the spectrum of high-energy protons escaping from a young SNR does not have a power-law form and the protons concentrate on high-energy region and (2) the escaping proton spectra and corresponding pi(0) decay gamma-ray spectra predicted in both methods are different, indicating that the second method overestimates the propagation effect. We may conclude that the first method is a more realistic description of the escape and propagation of high-energy protons near SNRs.
项目资助者: National Science Foundation of China (11433004, 11173020, 11133006, 11163006, 11173054, 11303012) ; Strategic Priority Research Program 'The Emergence of Cosmological Structures' of the Chinese Academy of Sciences(XDB09000000)
语种: 英语
原文出处: 查看原文
ISSN号: 0035-8711
文章类型: Article
归档日期: 2015-03-17
WOS标题词: Science & Technology ; Physical Sciences
研究领域[WOS]: Astronomy & Astrophysics
类目[WOS]: Astronomy & Astrophysics
关键词[WOS]: NONLINEAR PARTICLE-ACCELERATION ; GALACTIC COSMIC-RAYS ; DIFFUSIVE SHOCK ACCELERATION ; MOLECULAR CLOUDS ; GAMMA-RAYS ; RADIATION ; WAVES ; DISCOVERY ; VICINITY
WOS记录号: WOS:000351529500037
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内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/5046
Appears in Collections:高能天体物理研究组_期刊论文
中国科学院天体结构与演化重点实验室_期刊论文

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作者单位: 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.Department of Astronomy, Yunnan University, Key Laboratory of Astroparticle Physics of Yunnan Province, Kunming 650091, China

Recommended Citation:
Yang CY,Zhang, Li,Wang JC. On the escape and propagation of high-energy protons near young supernova remnants[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,448(4):3423-3428.
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