Massive stars exploding in a He-rich circumstellar medium: XI. Diverse evolution of five Ibn SNe 2020nxt, 2020taz, 2021bbv, 2023utc, and 2024aej
文献类型：期刊论文
| 作者 | Wang, Z.-Y.39,40; Pastorello, A.38; Cai YZ(蔡永志)35,36,37; Fraser, M.1; Reguitti, A.34,38; Lin, W.-L.32,33; Tartaglia, L.31; Andrew Howell, D.29,30; Benetti, S.38; Cappellaro, E.38 |
| 刊名 | Astronomy and Astrophysics
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 700 |
| 关键词 | circumstellar matter supernovae: individual: SN 2020nxt supernovae: individual: SN 2020taz supernovae: individual: SN 2021bbv supernovae: individual: SN 2023utc supernovae: individual: SN 2024aej |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202554768 |
| 产权排序 | 第4完成单位 |
| 文献子类 | Journal article (JA) - |
| 英文摘要 | We present the photometric and spectroscopic analysis of five Type Ibn supernovae (SNe): SN 2020nxt, SN 2020taz, SN 2021bbv, SN 2023utc, and SN 2024aej. These events share key observational features and belong to a family of objects similar to the prototypical Type Ibn SN 2006jc. The SNe exhibit rise times of approximately 10 days and peak absolute magnitudes ranging from -16.5 to -19 mag. Notably, SN 2023utc is the faintest Type Ibn SN discovered to date, with an exceptionally low r-band absolute magnitude of -16.4 mag. The pseudo-bolometric light curves peak at (1-10)× 1042 erg s-1, with total radiated energies on the order of (1-10)× 1048 erg. Spectroscopically, these SNe display a relatively slow spectral evolution. The early spectra are characterised by a hot blue continuum and prominent He I emission lines. The early spectra also show blackbody temperatures exceeding 10 000 K, with a subsequent decline in temperature during later phases. Narrow He I lines, which are indicative of unshocked circumstellar material (CSM), show velocities of approximately 1000 km s-1. The spectra suggest that the progenitors of these SNe underwent significant mass loss prior to the explosion, resulting in a He-rich CSM. Our light curve modelling yielded estimates for the ejecta mass (Mej) in the range (formula Presented) with kinetic energies (EKin) of (0.1-1)× 1050 erg. The inferred CSM mass ranges from 0.2 to (formula Presented). These findings are consistent with expectations for core collapse events arising from relatively massive envelope-stripped progenitors. © The Authors 2025. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 资助项目 | N/A |
| 语种 | 英语 |
| 资助机构 | N/A |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28515]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 作者单位 | 1.School of Physics, O’Brien Centre for Science North, University College Dublin, Dublin 4, Belfield, Ireland; 2.Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai, 519087, China 3.Institute for Frontier in Astronomy and Astrophysics, Beijing Normal University, Beijing, 102206, China; 4.School of Physics and Electronic Information, Jiangsu Second Normal University, Jiangsu, Nanjing, 211200, China; 5.Niels Bohr Institute, University of Copenhagen, Jagtvej 128, København N, 2200, Denmark; 6.Cosmic Dawn Center (DAWN), Denmark; 7.School of Physics and Electrical Engineering, Liupanshui Normal University, Guizhou, Liupanshui, 553004, China; 8.Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Quantum, Vesilinnantie 5, Turku, FI-20014, Finland; 9.Institut d’Estudis Espacials de Catalunya (IEEC), Castelldefels, Barcelona, 08860, Spain; 10.Institute for Astronomy, University of Hawai’i, 2680 Woodlawn Drive, Honolulu, HI, 96822, United States; |
| 推荐引用方式 GB/T 7714 | Wang, Z.-Y.,Pastorello, A.,Cai YZ,et al. Massive stars exploding in a He-rich circumstellar medium: XI. Diverse evolution of five Ibn SNe 2020nxt, 2020taz, 2021bbv, 2023utc, and 2024aej[J]. Astronomy and Astrophysics,2025,700. |
| APA | Wang, Z.-Y..,Pastorello, A..,蔡永志.,Fraser, M..,Reguitti, A..,...&Zhu, X.-J..(2025).Massive stars exploding in a He-rich circumstellar medium: XI. Diverse evolution of five Ibn SNe 2020nxt, 2020taz, 2021bbv, 2023utc, and 2024aej.Astronomy and Astrophysics,700. |
| MLA | Wang, Z.-Y.,et al."Massive stars exploding in a He-rich circumstellar medium: XI. Diverse evolution of five Ibn SNe 2020nxt, 2020taz, 2021bbv, 2023utc, and 2024aej".Astronomy and Astrophysics 700(2025). |
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