SN 2020pvb: A Type IIn-P supernova with a precursor outburst

Elias-Rosa, N ORCID: 0000-0002-1381-9125, Brennan, SJ, Benetti, S ORCID: 0000-0002-3256-0016, Cappellaro, E, Pastorello, A ORCID: 0000-0002-7259-4624, Kozyreva, A, Lundqvist, P, Fraser, M ORCID: 0000-0003-2191-1674, Anderson, JP ORCID: 0000-0003-0227-3451, Cai, YZ ORCID: 0000-0002-7714-493X, Chen, TW, Dennefeld, M, Gromadzki, M ORCID: 0000-0002-1650-1518, Gutiérrez, CP ORCID: 0000-0003-2375-2064, Ihanec, N, Inserra, C, Kankare, E, Kotak, R ORCID: 0000-0001-5455-3653, Mattila, S, Moran, S ORCID: 0000-0001-5221-0243 et al (2024) SN 2020pvb: A Type IIn-P supernova with a precursor outburst. Astronomy & Astrophysics, 686. ISSN 0004-6361

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Abstract

We present photometric and spectroscopic datasets for SN 2020pvb, a Type IIn-P supernova (SN) that is 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 that peaked at MB = -17.95 ± 0.30 mag and a plateau that lasted at least 40 days before going into solar conjunction. After this, the object was no longer visible at phases > 150 days above - 12.5 mag in the B band, suggesting that the SN 2020pvb ejecta interact with a dense, spatially confined circumstellar envelope. SN 2020pvb shows strong Balmer lines and a forest of Fe II lines with narrow P Cygni profiles in its spectra. Using archival images from the Hubble Space Telescope, we constrained the progenitor of SN 2020pvb to have a luminosity of log(L/L⊙)≤5.4, ruling out any single star progenitor over 50 M⊙. SN 2020pvb is a Type IIn-P whose progenitor star had an outburst*sim;0.5 yr before the final explosion; the material lost during this outburst probably plays a role in shaping the physical properties of the SN.

Item Type:	Article
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; Astronomy & Astrophysics
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	EDP Sciences
Date of acceptance:	2 February 2024
Date of first compliant Open Access:	24 September 2024
Date Deposited:	24 Sep 2024 11:45
Last Modified:	04 Jul 2025 08:45
DOI or ID number:	10.1051/0004-6361/202348790
URI:	https://researchonline.ljmu.ac.uk/id/eprint/24255

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