Supernova 2018cuf: A Type IIP Supernova with a Slow Fall from Plateau
文献类型：期刊论文
| 作者 | Dong,Yize2; Valenti,S.2; Bostroem,K. A.2; Sand,D. J.3; Andrews,Jennifer E.3; Galbany,L.4; Jha,Saurabh W.5; Eweis,Youssef5,6; Kwok,Lindsey5; Hsiao,E. Y.7 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020 |
| 卷号 | 906期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Core-collapse supernovae Type II supernovae |
| DOI | 10.3847/1538-4357/abc417 |
| 英文摘要 | Abstract We present multiband photometry and spectroscopy of SN?2018cuf, a Type IIP (“P” for plateau) supernova (SN) discovered by the Distance Less Than 40 Mpc Survey within 24 hr of explosion. SN?2018cuf appears to be a typical SN IIP, with an absolute V-band magnitude of ?16.73?±?0.32 at maximum and a decline rate of 0.21?±?0.05 mag/50 days during the plateau phase. The distance of the object was constrained to be 41.8?±?5.7 Mpc by using the expanding photosphere method. We used spectroscopic and photometric observations from the first year after the explosion to constrain the progenitor of SN?2018cuf using both hydrodynamic light-curve modeling and late-time spectroscopic modeling. The progenitor of SN?2018cuf was most likely a red supergiant of about 14.5 M⊙ that produced 0.04?±?0.01 M⊙ 56Ni during the explosion. We also found ～0.07 M⊙ of circumstellar material (CSM) around the progenitor is needed to fit the early light curves, where the CSM may originate from presupernova outbursts. During the plateau phase, high-velocity features at ～11,000 km s?1 were detected in both the optical and near-infrared spectra, supporting the possibility that the ejecta were interacting with some CSM. A very shallow slope during the postplateau phase was also observed, and it is likely due to a low degree of nickel mixing or the relatively high nickel mass in the SN. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-906-1-ABC417 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/60866]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Dong,Yize |
| 作者单位 | 1.Las Cumbres Observatory, 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA 2.Department of Physics and Astronomy, University of California, 1 Shields Avenue, Davis, CA 95616-5270, USA; yizdong@ucdavis.edu 3.Steward Observatory, University of Arizona, 933 North Cherry Avenue, Room N204, Tucson, AZ 85721-0065, USA 4.Departamento de Física Teórica y del Cosmos, Universidad de Granada, E-18071 Granada, Spain 5.Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854, USA 6.Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA 7.Department of Physics, Florida State University, 77 Chieftan Way, Tallahassee, FL 32306, USA 8.Department of Physics and Astronomy, Texas A&M University, 4242 TAMU, College Station, TX 77843, USA 9.Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku FI-20014, Finland 10.Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Turku FI-20014, Finland |
| 推荐引用方式 GB/T 7714 | Dong,Yize,Valenti,S.,Bostroem,K. A.,et al. Supernova 2018cuf: A Type IIP Supernova with a Slow Fall from Plateau[J]. The Astrophysical Journal,2020,906(1). |
| APA | Dong,Yize.,Valenti,S..,Bostroem,K. A..,Sand,D. J..,Andrews,Jennifer E..,...&Wyatt,S..(2020).Supernova 2018cuf: A Type IIP Supernova with a Slow Fall from Plateau.The Astrophysical Journal,906(1). |
| MLA | Dong,Yize,et al."Supernova 2018cuf: A Type IIP Supernova with a Slow Fall from Plateau".The Astrophysical Journal 906.1(2020). |
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来源：国家天文台
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