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A giant outburst two years before the core-collapse of a massive star
文献类型：期刊论文
| 作者 | Itagaki, K.; Navasardyan, H.; Valenti, S.; Patat, F.; Agnoletto, I.; Augusteijn, T.; Pastorello, A.; Smartt, S. J.; Mattila, S.; Eldridge, J. J. |
| 刊名 | NATURE
 |
| 出版日期 | 2007-06-14 |
| 卷号 | 447期号:7146页码:829-832 |
| DOI | 10.1038/nature05825 |
| 英文摘要 | The death of massive stars produces a variety of supernovae, which are linked to the structure of the exploding stars(1,2). The detection of several precursor stars of type II supernovae has been reported ( see, for example, ref. 3), but we do not yet have direct information on the progenitors of the hydrogen-deficient type Ib and Ic supernovae. Here we report that the peculiar type Ib supernova SN 2006jc is spatially coincident with a bright optical transient(4) that occurred in 2004. Spectroscopic and photometric monitoring of the supernova leads us to suggest that the progenitor was a carbon-oxygen Wolf - Rayet star embedded within a helium-rich circumstellar medium. There are different possible explanations for this pre-explosion transient. It appears similar to the giant outbursts of luminous blue variable stars (LBVs) of 60 - 100 solar masses(5), but the progenitor of SN 2006jc was helium- and hydrogen-deficient ( unlike LBVs). An LBV-like outburst of a Wolf - Rayet star could be invoked, but this would be the first observational evidence of such a phenomenon. Alternatively, a massive binary system composed of an LBV that erupted in 2004, and a Wolf - Rayet star exploding as SN 2006jc, could explain the observations. |
| 语种 | 英语 |
| WOS记录号 | WOS:000247207500037 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8970]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Osserv Astron Padova, INAF, I-36012 Vicenza, Italy 2.Max Planck Inst Astrophys, D-85741 Garching, Germany 3.Telescopio Nazl Galileo, Fdn Galileo Galilei, INAF, E-38700 Tenerife, Spain 4.Univ La Laguna, E-38206 Tenerife, Spain 5.Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland 6.Itagaki Astron Observ, Teppo, Yamagata 9902492, Japan 7.Kyushu Univ, Dept Phys, Fukuoka 8108560, Japan 8.Osserv Astron Padova, INAF, I-35122 Padua, Italy 9.European So Observ, D-85748 Garching, Germany 10.Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy |
| 推荐引用方式 GB/T 7714 | Itagaki, K.,Navasardyan, H.,Valenti, S.,et al. A giant outburst two years before the core-collapse of a massive star[J]. NATURE,2007,447(7146):829-832. |
| APA | Itagaki, K..,Navasardyan, H..,Valenti, S..,Patat, F..,Agnoletto, I..,...&Stanishev, V..(2007).A giant outburst two years before the core-collapse of a massive star.NATURE,447(7146),829-832. |
| MLA | Itagaki, K.,et al."A giant outburst two years before the core-collapse of a massive star".NATURE 447.7146(2007):829-832. |
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来源：国家天文台
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