Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star
文献类型：期刊论文
| 作者 | Nugent, Peter E.30,34; Leloudas, Giorgos31,33; Taddia, Francesco32; Sollerman, Jesper32; Gal-Yam, Avishay33; Katz, Sarah Rebekah37,38; Kasen, Daniel34,35,36; Bildsten, Lars1,37; Hosseinzadeh, Griffin37,38; McCully, Curtis37,38 |
| 刊名 | NATURE
 |
| 出版日期 | 2017-11-09 |
| 卷号 | 551期号:7679页码:210-+ |
| DOI | 10.1038/nature24030 |
| 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. |
| WOS关键词 | EXPANDING PHOTOSPHERE METHOD ; PULSATIONAL PAIR-INSTABILITY ; II SUPERNOVAE ; HIGH-REDSHIFT ; LIGHT CURVES ; LOW-RESOLUTION ; SKY SURVEY ; TELESCOPE ; GALAXIES ; SPECTROGRAPH |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000414734200043 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/20202]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA 2.CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA 3.Los Alamos Natl Lab, Space & Atmospher Sci Grp, Mail Stop D466, Los Alamos, NM 87545 USA 4.CALTECH, Spitzer Sci Ctr, MS 314-6, Pasadena, CA 91125 USA 5.Australian Astron Observ, POB 915, N Ryde, NSW 1670, Australia 6.ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia 7.Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Melbourne, Vic 3122, Australia 8.Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England 9.CALTECH, Cahill Ctr Astrophys, Pasadena, CA 91125 USA 10.Univ Calif Berkeley, Miller Inst Basic Res Sci, Berkeley, CA 94720 USA |
| 推荐引用方式 GB/T 7714 | Nugent, Peter E.,Leloudas, Giorgos,Taddia, Francesco,et al. Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star[J]. NATURE,2017,551(7679):210-+. |
| APA | Nugent, Peter E..,Leloudas, Giorgos.,Taddia, Francesco.,Sollerman, Jesper.,Gal-Yam, Avishay.,...&Khazov, Danny.(2017).Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star.NATURE,551(7679),210-+. |
| MLA | Nugent, Peter E.,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：国家天文台
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