| Detection of [C i] Emission in Nebular Spectra of a Peculiar Type Ia Supernova 2022pul | |
Liu, Jialian1; Wang, Xiaofeng1,2; Yang, Yi1,3; Filippenko, Alexei V.3; Brink, Thomas G.3; Zheng, WeiKang3; Zhang JJ(张居甲)4,5,6 ; Li, Gaici1; Yan, Shengyu1
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| 发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
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| 2025-03-20 | |
| 卷号 | 982期号:1 |
| DOI | 10.3847/2041-8213/adba61 |
| 产权排序 | 第4完成单位 |
| 收录类别 | SCI |
| 摘要 | SN 2022pul gains special attention due to its possible origin as a super-Chandrasekhar-mass white dwarf (WD) explosion (also called a 03fg-like Type Ia supernova), which shows prominent [O i], [Ne i], and [Ca ii] lines in its late-time spectra taken at similar to+300 days after the time of peak brightness. In this Letter, we present new optical observations of this peculiar object, extending up to over 500 days after peak brightness. In particular, in the t similar to +515 days spectrum, we identified for the first time the presence of narrow emission from [C i] lambda lambda 9824, 9850, which appears asymmetric and quite similar to the accompanied [O i] lambda 6300 line in strength and profile. Based on the violent merger model that accounts well for previous observations but leaves little carbon in the center of the ejecta, this carbon line can be reproduced by increasing the degree of clumping in the ejecta and setting the carbon mass the same as that of oxygen (similar to 0.06 M circle dot) in the innermost region (less than or similar to 2000 km s-1). In principle, the central carbon could come from the secondary WD if it is ignited when hit by the shock wave of the explosion of the primary WD and explodes as a Ca-rich supernova, whereas pure deflagration of a super-Chandrasekhar-mass WD can account for such unburnt carbon more naturally. |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12288102]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12033003]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11633002]; National Natural Science Foundation of China[CMS-CSST-2021-A12]; China Manned Space Project; Tencent Xplorer Prize; Christopher R. Redlich Fund; Briggs[202302AN360001]; International Centre of Supernovae, Yunnan Key Laboratory[2021YFA1600404]; National Key R&D Program of China[12173082]; NSFC[202201AT070069]; Yunnan Province Foundation; Top-notch Young Talents Program of Yunnan Province; Chinese Academy of Sciences |
| 项目资助者 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12288102, 12033003, 11633002] ; National Natural Science Foundation of China[CMS-CSST-2021-A12] ; China Manned Space Project ; Tencent Xplorer Prize ; Christopher R. Redlich Fund ; Briggs[202302AN360001] ; International Centre of Supernovae, Yunnan Key Laboratory[2021YFA1600404] ; National Key R&D Program of China[12173082] ; NSFC[202201AT070069] ; Yunnan Province Foundation ; Top-notch Young Talents Program of Yunnan Province ; Chinese Academy of Sciences |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 恒星与银河系 |
| 文章类型 | Article |
| 出版者 | IOP Publishing Ltd |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 2041-8205 |
| URL | 查看原文 |
| WOS记录号 | WOS:001450974200001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | WHITE-DWARF ; THERMONUCLEAR EXPLOSIONS ; JWST OBSERVATIONS ; EVOLUTION ; CARBON ; LUMINOSITY ; PHOTOMETRY ; TELESCOPE ; PROGRAM ; SYSTEM |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/28222 |
| 专题 | 南方基地 中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Physics Department, Tsinghua University, Beijing 100084, People's Republic of China; [email protected], [email protected]; 2.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, People's Republic of China; 3.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA; 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 5.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China; 6.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Liu, Jialian,Wang, Xiaofeng,Yang, Yi,et al. Detection of [C i] Emission in Nebular Spectra of a Peculiar Type Ia Supernova 2022pul[J]. ASTROPHYSICAL JOURNAL LETTERS,2025,982(1). |
| APA | Liu, Jialian.,Wang, Xiaofeng.,Yang, Yi.,Filippenko, Alexei V..,Brink, Thomas G..,...&Yan, Shengyu.(2025).Detection of [C i] Emission in Nebular Spectra of a Peculiar Type Ia Supernova 2022pul.ASTROPHYSICAL JOURNAL LETTERS,982(1). |
| MLA | Liu, Jialian,et al."Detection of [C i] Emission in Nebular Spectra of a Peculiar Type Ia Supernova 2022pul".ASTROPHYSICAL JOURNAL LETTERS 982.1(2025). |
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