We present photometric and spectroscopic data sets for SN 2020pvb, a Type IIn-P supernova (SN) similar to SNe 1994W, 2005cl, 2009kn and 2011ht, with a precursor outburst detected (PS1 w-band ~ -13.8 mag) around four months before the B-band maximum light. SN 2020pvb presents a relatively bright light curve peaking at M_B = -17.95 +- 0.30 mag and a plateau lasting at least 40 days before it went in solar conjunction. After this, the object is no longer visible at phases > 150 days above -12.5 mag in the B-band, suggesting that the SN 2020pvb ejecta interacts with a dense spatially confined circumstellar envelope. SN 2020pvb shows in its spectra strong Balmer lines and a forest of FeII lines with narrow P Cygni profiles. Using archival images from the Hubble Space Telescope, we constrain the progenitor of SN 2020pvb to have a luminosity of log(L/L_sun) <= 5.4, ruling out any single star progenitor over 50 M_sun. All in all, SN 2020pvb is a Type IIn-P whose progenitor star had an outburst ~ 0.5 yr before the final explosion, the material lost during this outburst is probably playing a role in shaping the physical properties of the supernova.
@article{arxiv.2402.02924,
title = {SN 2020pvb: a Type IIn-P supernova with a precursor outburst},
author = {Nancy Elias-Rosa and Seán J. Brennan and Stefano Benetti and Enrico Cappellaro and Andrea Pastorello and Alexandra Kozyreva and Peter Lundqvist and Morgan Fraser and Joseph P. Anderso and Yong-Zhi Cai and Ting-Wan Chen and Michel Dennefeld and Mariusz Gromadzki and Claudia P. Gutiérrez and Nada Ihanec and Cosimo Inserra and Erkki Kankare and Rubina Kotak and Seppo Mattila and Shane Moran and Tomás E. Müller-Bravo and Priscila J. Pessi and Giuliano Pignata and Andrea Reguitti and Thomas M. Reynolds and Stephen J. Smartt and Ken Smith and Leonardo Tartaglia and Giorgio Valerin and Thomas de Boer and Kenneth Chambers and Avishay Gal-Yam and Hua Gao and Stefan Geier and Paolo A. Mazzali and Matt Nicholl and Fabio Ragosta and Armin Rest and Ofer Yaron and David R. Young},
journal= {arXiv preprint arXiv:2402.02924},
year = {2024}
}
Comments
14 pages + 10 appendix pages, 12 figures + 2 appendix figures, 8 appendix tables. Accepted for publication in A&A