Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631
文献类型:期刊论文
作者 | Cai, Y.-Z.42; Pastorello, A.41; Fraser, M.40; Wang, X.-F.39,42; Filippenko, A. V.38; Reguitti, A.36,37,41; Patra, K. C.35,38; Goranskij, V. P.33,34; Barsukova, E. A.33; Brink, T. G.38 |
刊名 | ASTRONOMY & ASTROPHYSICS |
出版日期 | 2022-10-28 |
卷号 | 667 |
ISSN号 | 0004-6361 |
关键词 | binaries: close stars: winds, outflows stars: individual: AT 2021biy |
DOI | 10.1051/0004-6361/202244393 |
产权排序 | 第33完成单位 |
文献子类 | Article |
英文摘要 | We present an observational study of the luminous red nova (LRN) AT 2021biy in the nearby galaxy NGC 4631. The field of the object was routinely imaged during the pre-eruptive stage by synoptic surveys, but the transient was detected only at a few epochs from similar to 231 days before maximum brightness. The LRN outburst was monitored with unprecedented cadence both photometrically and spectroscopically. AT 2021biy shows a short-duration blue peak, with a bolometric luminosity of similar to 1.6 x 10(41) erg s(-1), followed by the longest plateau among LRNe to date, with a duration of 210 days. A late-time hump in the light curve was also observed, possibly produced by a shell-shell collision. AT 2021biy exhibits the typical spectral evolution of LRNe. Early-time spectra are characterised by a blue continuum and prominent H emission lines. Then, the continuum becomes redder, resembling that of a K-type star with a forest of metal absorption lines during the plateau phase. Finally, late-time spectra show a very red continuum (T-BB approximate to 2050 K) with molecular features (e.g., TiO) resembling those of M-type stars. Spectropolarimetric analysis indicates that AT 2021biy has local dust properties similar to those of V838 Mon in the Milky Way Galaxy. Inspection of archival Hubble Space Telescope data taken on 2003 August 3 reveals a similar to 20 M-circle dot progenitor candidate with log (L/L-circle dot)= 5.0 dex and T-eff = 5900 K at solar metallicity. The above luminosity and colour match those of a luminous yellow supergiant. Most likely, this source is a close binary, with a 17-24 M(circle dot)( )primary component. |
学科主题 | 天文学 ; 恒星与银河系 |
URL标识 | 查看原文 |
出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
WOS关键词 | ELECTRON-CAPTURE SUPERNOVAE ; RICH CIRCUMSTELLAR MEDIUM ; SN HUNT 248 ; STELLAR MERGERS ; V838 MONOCEROTIS ; V4332 SAGITTARII ; DUSTY AFTERMATH ; DATA RELEASE ; EVOLUTION ; TRANSIENT |
资助项目 | N/A |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | EDP SCIENCES S A |
WOS记录号 | WOS:000875299200003 |
资助机构 | N/A |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25639] |
专题 | 云南天文台_丽江天文观测站(南方基地) 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
通讯作者 | Cai, Y.-Z. |
作者单位 | 1.Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, Hebei University, Baoding 071002, PR China 2.Department of Physics, College of Physical Sciences and Technology, Hebei University, Baoding 071002, PR China; 3.School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082, PR China; 4.Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263 001, India; 5.Finnish Centre for Astronomy with ESO (FINCA), 20014 University of Turku, Finland; 6.University of Chinese Academy of Sciences, Beijing 100049, PR China; 7.Hiroshima Astrophysical Science Centre, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan; 8.Institut d’Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain; 9.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, PR China; 10.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, PR China; |
推荐引用方式 GB/T 7714 | Cai, Y.-Z.,Pastorello, A.,Fraser, M.,et al. Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631[J]. ASTRONOMY & ASTROPHYSICS,2022,667. |
APA | Cai, Y.-Z..,Pastorello, A..,Fraser, M..,Wang, X.-F..,Filippenko, A. V..,...&Zhang, X.-H..(2022).Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631.ASTRONOMY & ASTROPHYSICS,667. |
MLA | Cai, Y.-Z.,et al."Forbidden hugs in pandemic times III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631".ASTRONOMY & ASTROPHYSICS 667(2022). |
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来源:云南天文台
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