Implications for the explosion mechanism of Type Ia supernovae from their late-time spectra
文献类型：期刊论文
| 作者 | Liu, Jialian3; Wang, Xiaofeng3,4; Filippenko, Alexei, V2; Brink, Thomas G.2; Yang, Yi2; Zheng, Weikang2; Sai, Hanna3; Xi, Gaobo3; Yan, Shengyu3; Elias-Rosa, Nancy1,8 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2023-09-21 |
| 卷号 | 526期号:1页码:1268-1286 |
| 关键词 | line: profiles techniques: spectroscopic transients: supernovae |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stad2851 |
| 产权排序 | 7 |
| 英文摘要 | Late-time spectra of Type Ia supernovae (SNe Ia) are important in clarifying the physics of their explosions, as they provide key clues to the inner structure of the exploding white dwarfs. We examined late-time optical spectra of 36 SNe Ia, including five from our own project (SNe 2019np, 2019ein, 2021hpr, 2021wuf, and 2022hrs), with phase coverage of similar to 200 to similar to 400 d after maximum light. At this late phase, the outer ejecta have become transparent and the features of inner iron-group elements emerge in the spectra. Based on multicomponent Gaussian fits and reasonable choices for the pseudo-continuum around Ni and Fe emission features, we get reliable estimates of the Ni to Fe ratio, which is sensitive to the explosion models of SNe Ia. Our results show that the majority (about 67 per cent) of our SNe Ia are more consistent with the sub-Chandrasekhar-mass (i.e. double-detonation) model, although they could be affected by evolutionary or ionization effects. Moreover, we find that the Si ii lambda 6355 velocity measured around the time of maximum light tends to increase with the Ni to Fe ratio for the subsample with either redshifted or blueshifted nebular velocities, suggesting that progenitor metallicity might play an important role in accounting for the observed velocity diversity of SNe Ia. |
| WOS关键词 | NEAR-INFRARED OBSERVATIONS ; NEBULAR-PHASE SPECTRA ; NORMAL SN IA ; LIGHT CURVES ; OPTICAL SPECTROSCOPY ; ABSOLUTE MAGNITUDES ; WHITE-DWARFS ; ULTRAVIOLET ; DIVERSITY ; VELOCITY |
| 资助项目 | National Science Foundation of China (NSFC)[12288102] ; National Science Foundation of China (NSFC)[12033003] ; National Science Foundation of China (NSFC)[11633002] ; National Science Foundation of China (NSFC)[12090044] ; Ma Huateng Foundation ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; Tencent Xplorer Prize ; Christopher R. Redlich Fund ; Gary and Cynthia Bengier ; Clark and Sharon Winslow ; Sanford Robertson ; Alan Eustace ; Briggs and Kathleen Wood ; MIUR[20179ZF5KS] ; Spanish MICINN[PID2019-108709GB-I00] ; FEDER funds ; program Unidad de Excelencia Mar'ia de Maeztu[CEX2020-001058-M] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001099066200028 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Science Foundation of China (NSFC) ; Ma Huateng Foundation ; Scholar Program of Beijing Academy of Science and Technology ; Tencent Xplorer Prize ; Christopher R. Redlich Fund ; Gary and Cynthia Bengier ; Clark and Sharon Winslow ; Sanford Robertson ; Alan Eustace ; Briggs and Kathleen Wood ; MIUR ; Spanish MICINN ; FEDER funds ; program Unidad de Excelencia Mar'ia de Maeztu |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5619]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 新疆天文台_其它 |
| 通讯作者 | Liu, Jialian; Wang, Xiaofeng |
| 作者单位 | 1.INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy 2.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA 3.Tsinghua Univ, Tsinghua Ctr Astrophys, Phys Dept, Beijing 100084, Peoples R China 4.Beijing Acad Sci & Technol, Beijing Planetarium, Beijing 100044, Peoples R China 5.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 7.Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel 8.Inst Space Sci ICE CSIC, Campus UAB,Carrer Can Magrans s-n, Barcelona 08193, Spain |
| 推荐引用方式 GB/T 7714 | Liu, Jialian,Wang, Xiaofeng,Filippenko, Alexei, V,et al. Implications for the explosion mechanism of Type Ia supernovae from their late-time spectra[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,526(1):1268-1286. |
| APA | Liu, Jialian.,Wang, Xiaofeng.,Filippenko, Alexei, V.,Brink, Thomas G..,Yang, Yi.,...&Iskandar, Abdusamatjan.(2023).Implications for the explosion mechanism of Type Ia supernovae from their late-time spectra.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,526(1),1268-1286. |
| MLA | Liu, Jialian,et al."Implications for the explosion mechanism of Type Ia supernovae from their late-time spectra".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 526.1(2023):1268-1286. |
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来源：新疆天文台
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