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The impact of different interstellar medium structures on the dynamical evolution of supernova remnants
Wang, Yueyang1; Bao, Biwen1; Yang CY(杨初源)2,3,4; Zhang, Li1
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2018-08-01
卷号478期号:3页码:2948-2961
DOI10.1093/mnras/sty1275
产权排序第3完成单位
收录类别SCI
关键词Mhd Turbulence Ism: Supernova Remnants
摘要

The dynamical properties of supernova remnants (SNRs) evolving with different interstellar medium structures are investigated through performing extensive 2D magnetohydrodynamic (MHD) simulations in the cylindrical symmetry. Three cases of different interstellar medium structures are considered: the uniform medium, the turbulent medium, and the cloudy medium. Large-scale density and magnetic fluctuations are calculated and mapped into the computational domain before simulations. The clouds are set by random distribution in advance. The above configuration allows us to study the time-dependent dynamical properties and morphological evolution of the SNR evolving with different ambient structures, along with the development of the instabilities at the contact discontinuity. Our simulation results indicate that remnant morphology deviates from symmetry if the interstellar medium contains clouds or turbulent density fluctuations. In the cloudy medium case, interactions between the shock wave and clouds lead to clouds' fragmentation. The magnetic field can be greatly enhanced by stretching field lines with a combination of instabilities while the width of amplification region is quite different among the three cases. Moreover, both the width of amplification region and the maximum magnetic-field strength are closely related to the clouds' density.

资助项目National Natural Science Foundation of China[11661161010] ; National Natural Science Foundation of China[11433004] ; National Natural Science Foundation of China[11673060] ; Natural Science Foundation of Yunnan Province[2016FB003] ; National Natural Science Foundation of China[U1738211]
语种英语
学科领域天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者OXFORD UNIV PRESS
ISSN0035-8711
URL查看原文
WOS记录号WOS:000441282300008
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Efficient Particle-acceleration ; Rayleigh-taylor Instabilities ; Magnetic-field Amplification ; Molecular Clouds ; Cosmic-rays ; Gamma-rays ; Turbulent ; Simulations ; Emission ; Density
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/17886
专题高能天体物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Zhang, Li
作者单位1.Department of Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, PR China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650091, PR China
3.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan Province 650011, PR China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, PR Chin
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GB/T 7714
Wang, Yueyang,Bao, Biwen,Yang CY,et al. The impact of different interstellar medium structures on the dynamical evolution of supernova remnants[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,478(3):2948-2961.
APA Wang, Yueyang,Bao, Biwen,Yang CY,&Zhang, Li.(2018).The impact of different interstellar medium structures on the dynamical evolution of supernova remnants.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,478(3),2948-2961.
MLA Wang, Yueyang,et al."The impact of different interstellar medium structures on the dynamical evolution of supernova remnants".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 478.3(2018):2948-2961.
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