中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star

文献类型:期刊论文

作者Arcavi, Iair1,2,3; Howell, D. Andrew1,3; Daniel Kasen4,5,6; LarsBildsten2,3; Griffin Hosseinzadeh1,3; CurtisMcCully1,3; Zheng Chuen Wong1,3; Sarah Rebekah Katz1,3; Avishay Gal-Yam7; Jesper Sollerman8
刊名NATURE
出版日期2017-11-09
卷号551期号:7679页码:210-+
ISSN号0028-0836
DOI10.1038/nature24030
产权排序第23完成单位
文献子类Article
英文摘要

Every supernova so far observed has been considered to be the terminal explosion of a star. Moreover, all supernovae with absorption lines in their spectra show those lines decreasing in velocity over time, as the ejecta expand and thin, revealing slower-moving material that was previously hidden. In addition, every supernova that exhibits the absorption lines of hydrogen has one main light-curve peak, or a plateau in luminosity, lasting approximately 100 days before declining(1). Here we report observations of iPTF14hls, an event that has spectra identical to a hydrogen-rich core-collapse supernova, but characteristics that differ extensively from those of known supernovae. The light curve has at least five peaks and remains bright for more than 600 days; the absorption lines show little to no decrease in velocity; and the radius of the line-forming region is more than an order of magnitude bigger than the radius of the photosphere derived from the continuum emission. These characteristics are consistent with a shell of several tens of solar masses ejected by the progenitor star at supernova-level energies a few hundred days before a terminal explosion. Another possible eruption was recorded at the same position in 1954. Multiple energetic pre-supernova eruptions are expected to occur in stars of 95 to 130 solar masses, which experience the pulsational pair instability(2-5). That model, however, does not account for the continued presence of hydrogen, or the energetics observed here. Another mechanism for the violent ejection of mass in massive stars may be required.

学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
WOS关键词EXPANDING PHOTOSPHERE METHOD ; PULSATIONAL PAIR-INSTABILITY ; II SUPERNOVAE ; HIGH-REDSHIFT ; LIGHT CURVES ; LOW-RESOLUTION ; SKY SURVEY ; TELESCOPE ; GALAXIES ; SPECTROGRAPH
资助项目N/A
WOS研究方向Science & Technology - Other Topics
语种英语
出版者NATURE PUBLISHING GROUP
WOS记录号WOS:000414734200043
资助机构N/A
源URL[http://ir.ynao.ac.cn/handle/114a53/11893]  
专题云南天文台_丽江天文观测站(南方基地)
云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Arcavi, Iair
作者单位1.Las Cumbres Observatory, Goleta; CA; 93117, United States
2.Kavli Institute for Theoretical Physics, University of California, Santa Barbara; CA; 93106, United States
3.Department of Physics, University of California, Santa Barbara; CA; 93106, United States
4.Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley; CA; 94720, United States
5.Department of Physics, University of California, Berkeley; CA; 94720, United States
6.Department of Astronomy, University of California, Berkeley; CA; 94720-3411, United States
7.Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot; 76100, Israel
8.Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, Stockholm; SE-10691, Sweden
9.Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, Copenhagen; 2100, Denmark
10.Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley; CA; 94720, United States
推荐引用方式
GB/T 7714
Arcavi, Iair,Howell, D. Andrew,Daniel Kasen,et al. Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star[J]. NATURE,2017,551(7679):210-+.
APA Arcavi, Iair.,Howell, D. Andrew.,Daniel Kasen.,LarsBildsten.,Griffin Hosseinzadeh.,...&Bue, Brian.(2017).Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star.NATURE,551(7679),210-+.
MLA Arcavi, Iair,et al."Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star".NATURE 551.7679(2017):210-+.

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来源:云南天文台

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