Gangopadhyay, Anjasha ; Misra, Kuntal ; Hiramatsu, Daichi ; Wang, Shan-Qin ; Hosseinzadeh, Griffin ; Wang, Xiaofeng ; Valenti, Stefano ; Zhang, Jujia ; Howell, D. Andrew ; Arcavi, Iair ; Anupama, G. C. ; Burke, Jamison ; Dastidar, Raya ; Itagaki, Koichi ; Kumar, Brajesh ; Kumar, Brijesh ; Li, Long ; McCully, Curtis ; Mo, Jun ; Pandey, Shashi Bhushan ; Pellegrino, Craig ; Sai, Hanna ; Sahu, D. K. ; Sanwal, Pankaj ; Singh, Avinash ; Singh, Mridweeka ; Zhang, Jicheng ; Zhang, Tianmeng ; Zhang, Xinhan (2020) Flash Ionization Signatures in the Type Ibn Supernova SN 2019uo The Astrophysical Journal, 889 (2). p. 170. ISSN 1538-4357
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Official URL: http://doi.org/10.3847/1538-4357/ab6328
Related URL: http://dx.doi.org/10.3847/1538-4357/ab6328
Abstract
We present photometric and spectroscopic observations of the type Ibn supernova (SN) 2019uo, the second ever SN Ibn with flash ionization (He ii, C iii, N iii) features in its early spectra. SN 2019uo displays a rapid post-peak luminosity decline of 0.1 mag day−1 similar to most of the SNe Ibn, but is fainter (MVmax=−18.30±0.24 mag) than a typical SN Ibn and shows a color evolution that places it between SNe Ib and the most extreme SNe Ibn. SN 2019uo shows P-cygni He i features in the early spectra which gradually evolve and become emission dominated post peak. It also shows faster evolution in line velocities as compared to most other members of the type Ibn subclass. The bolometric light curve is fairly well described by a 56Ni + circumstellar interaction model.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to IOP Publishing |
| ID Code: | 130596 |
| Deposited On: | 01 Dec 2022 11:03 |
| Last Modified: | 01 Dec 2022 11:03 |
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