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

Elias-Rosa, N., Brennan, S. J., Benetti, S., Cappellaro, E., Pastorello, A., Kozyreva, A., Lundqvist, P., Fraser, M., Anderson, J. P., Cai, Y.-Z., Chen, T.-W., Dennefeld, M., Gromadzki, M., Gutiérrez, C. P., Ihanec, N., Inserra, C. ORCID: https://orcid.org/0000-0002-3968-4409, Kankare, E., Kotak, R., Mattila, S., Moran, S., Müller-Bravo, T. E., Pessi, P. J., Pignata, G., Reguitti, A., Reynolds, T. M., Smartt, S. J., Smith, K., Tartaglia, L., Valerin, G., de Boer, T., Chambers, K., Gal-Yam, A., Gao, H., Geier, S., Mazzali, P. A., Nicholl, M., Ragosta, F., Rest, A., Yaron, O. and Young, D. R. 2024. SN 2020pvb: A Type IIn-P supernova with a precursor outburst. Astronomy & Astrophysics 686 , A13. 10.1051/0004-6361/202348790

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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 ∼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
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	EDP Sciences
ISSN:	0004-6361
Date of First Compliant Deposit:	11 July 2024
Date of Acceptance:	2 February 2024
Last Modified:	19 Jul 2024 10:15
URI:	https://orca.cardiff.ac.uk/id/eprint/170518

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