Numerically modelling the Cygnus Loop as a remnant evolved in an anisotropic cavity
Fang, Jun1,2; Yu, Huan3,4; Zhang, Li1; Fang, Jun(Yunnan Univ, Key Lab Astroparticle Phys Yunnan Prov, Dept Astron, Kunming 650091, Peoples R China)
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2017
卷号464期号:1页码:940-945
DOI10.1093/mnras/stw2473
收录类别SCI
关键词Hydrodynamics Methods: Numerical Ism: Individual Objects: Cygnus Loop Ism: Supernova Remnants
摘要The morphology of the middle-aged supernova remnant, Cygnus Loop, seen in X-rays, is peculiar, with a blowout in the south region and other irregular features, such as a bump in the west, a limb with a planar morphology in the east and asymmetry between the east and the west shock profiles of the blowout. The detailed process of the formation of the peculiar profile of the shock is still unclear. We perform three-dimensional hydrodynamical simulations for the remnant to revisit its evolution. In the simulations, the progenitor ejects an anisotropic, latitude-dependent wind, and travels in a direction that is not aligned with the symmetry axis of the wind. As a result, a cavity with a fringed structure is produced. The remnant has evolved in the cavity for about 10(4) yr. In the north-east, the shock has first encountered the bow shock, and this part corresponds to the bright north-eastern region. The south blowout is formed due to the shock travelling into the undisturbed wind, and the interaction of the shock with the cavity leads to the other peculiar features of the shock structure. The resulting profile of the remnant is consistent with that indicated in X-rays. It can be concluded that the supernova explosion occurred in the cavity produced by an anisotropic stellar wind experiencing two main phases with different wind velocities.
项目资助者National Natural Science Foundation of China (NSFC)(11563009) ; Open Research Programme of the Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences(OP201402) ; Yunnan Applied Basic Research Projects(2016FB001, 2016FD105) ; Top Talents Programme of Yunnan Province, China(2015HA030) ; NSFC(11433004) ; IRTSTYN
语种英语
学科领域天文学
文章类型Article
ISSN0035-8711
URL查看原文
WOS记录号WOS:000393646300071
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SUPERNOVA REMNANT ; X-RAY ; NONTHERMAL EMISSION ; ORIGIN ; SIMULATION ; EXPLOSION ; PLASMA ; PLUTO ; CODE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9922
专题中国科学院天体结构与演化重点实验室
通讯作者Fang, Jun(Yunnan Univ, Key Lab Astroparticle Phys Yunnan Prov, Dept Astron, Kunming 650091, Peoples R China)
作者单位1.Department of Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.Department of Physical Science and Technology, Kunming University, Kunming 650214, China
4.Key Laboratory of Yunnan Provincial Higher Education Institutions for Organic Optoelectronic Materials and Devices, Kunming University, Kunming 650214, China
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Fang, Jun,Yu, Huan,Zhang, Li,et al. Numerically modelling the Cygnus Loop as a remnant evolved in an anisotropic cavity[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,464(1):940-945.
APA Fang, Jun,Yu, Huan,Zhang, Li,&Fang, Jun.(2017).Numerically modelling the Cygnus Loop as a remnant evolved in an anisotropic cavity.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,464(1),940-945.
MLA Fang, Jun,et al."Numerically modelling the Cygnus Loop as a remnant evolved in an anisotropic cavity".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 464.1(2017):940-945.
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