Characteristic velocities of stripped-envelope core-collapse supernova cores star
文献类型：期刊论文
| 作者 | Maurer, J. I.1; Mazzali, P. A.1,2,3; Deng, J.4 ; Filippenko, A. V.5; Hamuy, M.6; Kirshner, R. P.7; Matheson, T.8; Modjaz, M.5; Pian, E.9,10; Stritzinger, M.11,12
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2010-02-11 |
| 卷号 | 402期号:1页码:161-172 |
| 关键词 | line: profiles radiative transfer supernovae: general |
| 英文摘要 | The velocity of the inner ejecta of stripped-envelope core-collapse supernovae (CC-SNe) is studied by means of an analysis of their nebular spectra. Stripped-envelope CC-SNe are the result of the explosion of bare cores of massive stars (>= 8 M(circle dot)), and their late-time spectra are typically dominated by a strong [O i] lambda lambda 6300, 6363 emission line produced by the innermost, slow-moving ejecta which are not visible at earlier times as they are located below the photosphere. A characteristic velocity of the inner ejecta is obtained for a sample of 56 stripped-envelope CC-SNe of different spectral types (IIb, Ib, Ic) using direct measurements of the linewidth as well as spectral fitting. For most SNe, this value shows a small scatter around 4500 km s-1. Observations (< 100 d) of stripped-envelope CC-SNe have revealed a subclass of very energetic SNe, termed broad-lined SNe (BL-SNe) or hypernovae, which are characterized by broad absorption lines in the early-time spectra, indicative of outer ejecta moving at very high velocity (v >= 0.1c). SNe identified as BL in the early phase show large variations of core velocities at late phases, with some having much higher and some having similar velocities with respect to regular CC-SNe. This might indicate asphericity of the inner ejecta of BL-SNe, a possibility we investigate using synthetic three-dimensional nebular spectra. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000274453500014 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7698]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Max Planck Inst Astrophys, D-85741 Garching, Germany 2.Scuola Normale Super Pisa, I-56126 Pisa, Italy 3.Natl Inst Astrophys OAPd, I-35122 Padua, Italy 4.CAS, Natl Astron Observ, Beijing 1000012, Peoples R China 5.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA 6.Univ Chile, Dept Astron, Santiago, Chile 7.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 8.Natl Opt Astron Observ, Tucson, AZ 85719 USA 9.Trieste Astron Observ, INAF, I-34143 Trieste, Italy 10.European So Observ, D-85748 Garching, Germany |
| 推荐引用方式 GB/T 7714 | Maurer, J. I.,Mazzali, P. A.,Deng, J.,et al. Characteristic velocities of stripped-envelope core-collapse supernova cores star[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,402(1):161-172. |
| APA | Maurer, J. I..,Mazzali, P. A..,Deng, J..,Filippenko, A. V..,Hamuy, M..,...&Valenti, S..(2010).Characteristic velocities of stripped-envelope core-collapse supernova cores star.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,402(1),161-172. |
| MLA | Maurer, J. I.,et al."Characteristic velocities of stripped-envelope core-collapse supernova cores star".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 402.1(2010):161-172. |
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来源：国家天文台
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