A long-lasting eruption heralds SN 2023ldh, a clone of SN 2009ip
文献类型：期刊论文
| 作者 | Pastorello, A.31; Reguitti, A.30,31; Tartaglia, L.29; Valerin, G.31; Cai YZ(蔡永志)26,27,28; Charalampopoulos, P.25; De Luise, F.29; Dong, Y.1,24; Elias-Rosa, N.23,31; Farah, J.21,22 |
| 刊名 | Astronomy and Astrophysics
 |
| 出版日期 | 2025-09-01 |
| 卷号 | 701 |
| 关键词 | stars: winds outflows supernovae: individual: SN 2023ldh supernovae: individual: SN 2009ip |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202554858 |
| 产权排序 | 第4完成单位 |
| 文献子类 | Journal article (JA) - |
| 英文摘要 | We discuss the results of the spectroscopic and photometric monitoring of the type IIn supernova (SN) 2023ldh. Survey archive data show that the SN progenitor experienced erratic variability in the years before exploding. Beginning May 2023, the source showed a general slow luminosity rise that lasted for over four months, with some superposed luminosity fluctuations. In analogy to SN 2009ip, we call this brightening Event Aa. During Event A, SN 2023ldh reached a maximum absolute magnitude of Mr=15.52±0.24 mag. The light curves then decreased by about 1 mag in all filters for about two weeks reaching a relative minimum, which was followed by a steep brightening (Event B) to an absolute peak magnitude of Mr=18.53±0.23 mag, replicating the evolution of SN 2009ip and similar to that of type IIn SNe. The three spectra of SN 2023ldh obtained during Event A show multi-component P Cygni profiles of H I and Fe II lines. During the rise to the Event B peak, the spectrum shows a blue continuum dominated by Balmer lines in emission with Lorentzian profiles, with a full width at half maximum velocity of about 650 km s1. Later, in the post-peak phase, the spectrum reddens, and broader wings appear in the Hα line profile. Metal lines with P Cygni profiles and velocities of about 2000 km s1 are clearly visible. Beginning around three months past maximum and until very late phases, the Ca II lines become among the most prominent features, while Hα is dominated by an intermediate-width component with a boxy profile. Although SN 2023ldh mimics the evolution of other SN 2009ip-like transients, it is slightly more luminous and has a slower photometric evolution. The surprisingly homogeneous observational properties of SN 2009ip-like events may indicate similar explosion scenarios and similar progenitor parameters. © 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 |
| WOS记录号 | WOS:001562399900014 |
| 资助机构 | N/A |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28577]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 作者单位 | 1.Center for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA, 02138-1516, United States; 2.Variable Star Observers League in Japan, 7-1 Kitahatsutomi, Kamagaya, Chiba, 273-0126, Japan; 3.The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, Stockholm, SE-10691, Sweden; 4.Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI, 96822, United States 5.Astrophysics Research Centre, School of Mathematics and Physics, Queena S University Belfast, Belfast, BT7 1NN, United Kingdom; 6.Department of Physics, University of Oxford, Denys Wikinson Building, Kable Road, Oxford, OX1 3RH, United Kingdom; 7.Technical University of Munich, TUM, School of Natural Sciences, Physics Department, James-Franck-Str. 1, Garching, 85741, Germany; 8.INAF, IASF Milano, Via A. Corti 12, Milano, I-20133, Italy; 9.Dipartimento di Fisica, Universita Degli Studi di Milano, Via Celoria 16, Milano, I-20133, Italy; 10.INAF, Osservatorio Astronomico di Capodimonte, Via Moiariello 16, Napoli, 80131, Italy; |
| 推荐引用方式 GB/T 7714 | Pastorello, A.,Reguitti, A.,Tartaglia, L.,et al. A long-lasting eruption heralds SN 2023ldh, a clone of SN 2009ip[J]. Astronomy and Astrophysics,2025,701. |
| APA | Pastorello, A..,Reguitti, A..,Tartaglia, L..,Valerin, G..,蔡永志.,...&Wainscoat, R. J..(2025).A long-lasting eruption heralds SN 2023ldh, a clone of SN 2009ip.Astronomy and Astrophysics,701. |
| MLA | Pastorello, A.,et al."A long-lasting eruption heralds SN 2023ldh, a clone of SN 2009ip".Astronomy and Astrophysics 701(2025). |
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来源：云南天文台
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