Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors
文献类型：期刊论文
| 作者 | Wang B(王博)1,2 ; Meng XC(孟祥存)1,2; Wang, XF3,4; Han ZW(韩占文)1
|
| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2008 |
| 卷号 | 8期号:1页码:71-80 |
| 关键词 | stars : evolution supemovae : general white dwarfs |
| ISSN号 | 1009-9271 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Wang, B (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | The amount of Ni-56 produced in Type Ia supernova (SN Ia) explosion is probably the most important physical parameter underlying the observed correlation of SN Ia luminosities with their light curves. Based on an empirical relation between the Ni-56 mass and the light curve parameter Delta m(15), we obtained rough estimates of the Ni-56 mass for a large sample of nearby SNe Ia with the aim of exploring the diversity in SN Ia. We found that the derived Ni-56 masses for different SNe Ia could vary by a factor of ten (e.g., M-Ni = 0.1 - 1.3 M(D), which cannot be explained in terms of the standard Chandrasekhar-mass model (with a 56Ni mass production of 0.4 - 0.8 M-circle dot). Different explosion and/or progenitor models are clearly required for various SNe Ia, in particular, for those extremely nickel-poor and nickel-rich producers. The nickel-rich (with M-Ni > 0.8 M-circle dot) SNe Ia are very luminous and may have massive progenitors exceeding the Chandrasekhar-mass limit since extra progenitor fuel is required to produce more Ni-56 to power the light curve. This is also consistent with the finding that the intrinsically bright SNe Ia prefer to occur in stellar environments of young and massive stars. For example, 75% SNe Ia in spirals have Delta m(15) < 1.2 while this ratio is only 18% in E/S0 galaxies. The nickel-poor SNe Ia (with M-Ni < 0.2 M-circle dot) may invoke the sub-Chandrasekhar model, as most of them were found in early-type E/SO galaxies dominated by the older and low-mass stellar populations. This indicates that SNe Ia in spiral and E/SO galaxies have progenitors of different properties. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HUBBLE CONSTANT ; EXPLOSION MODELS ; LIGHT CURVES ; WHITE-DWARFS ; PEAK LUMINOSITY ; STAR-FORMATION ; HOST GALAXIES ; DECLINE RATE ; MASS ; EVOLUTION |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/1009-9271/8/1/07/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000253671300007 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4462]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 2.Graduate School of Chinese Academy of Sciences, Beijing 100049 3.Tsinghua Center for Astrophysics (THCA) and Department of Physics, Tsinghua University, Beijing 100084 4.Astronomy Department, University of California at Berkeley, CA 94720, USA |
| 推荐引用方式 GB/T 7714 | Wang B,Meng XC,Wang, XF,et al. Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(1):71-80. |
| APA | Wang B,Meng XC,Wang, XF,&Han ZW.(2008).Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(1),71-80. |
| MLA | Wang B,et al."Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.1(2008):71-80. |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。