SN 2020pvb: A Type IIn-P supernova with a precursor outburst
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Published:2024-05-24
Issue:
Volume:686
Page:A13
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ISSN:0004-6361
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Container-title:Astronomy & Astrophysics
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language:
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Short-container-title:A&A
Author:
Elias-Rosa N.ORCID, Brennan S. J., Benetti S.ORCID, Cappellaro E., Pastorello A.ORCID, Kozyreva A., Lundqvist P., Fraser M.ORCID, Anderson J. P.ORCID, Cai Y.-Z.ORCID, Chen T.-W., Dennefeld M., Gromadzki M.ORCID, Gutiérrez C. P.ORCID, Ihanec N., Inserra C., Kankare E., Kotak R.ORCID, Mattila S., Moran S.ORCID, Müller-Bravo T. E., Pessi P. J.ORCID, Pignata G., Reguitti A.ORCID, Reynolds T. M., Smartt S. J., Smith K.ORCID, Tartaglia L., Valerin G., de Boer T., Chambers K.ORCID, Gal-Yam A., Gao H.ORCID, Geier S., Mazzali P. A., Nicholl M., Ragosta F., Rest A.ORCID, Yaron O., Young D. R.ORCID
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.
Funder
PRIN-INAF 2022 Royal Sociery Horizon 2020 Framework Programme Polish NCN Research Council of Finland Agencia Estatal de Investigación Consejo Superior de Investigaciones Científicas Unidad de Excelencia Maria de Maeztu National Natural Science Foundation of China Horizon 2020 Research and Innovation Programme of the European Union under the Marie Sklodowska-Curie and the Beatriu de Pinos Ministry of Economy, Development, and Tourism’s Millennium Science Initiative STFC
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