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SN 2020cpg: an energetic link between Type IIb and Ib supernovae

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cris.lastimport.scopus2024-02-12T20:44:35Z
dc.abstract.enStripped-envelope supernovae (SE-SNe) show a wide variety of photometric and spectroscopic properties. This is due to the different potential formation channels and the stripping mechanism that allows for a large diversity within the progenitors outer envelope compositions. Here, the photometric and spectroscopic observations of SN 2020cpg covering ~130 d from the explosion date are presented. SN 2020cpg (z = 0.037) is a bright SE-SNe with the B-band peaking at M<SUB>B</SUB> = -17.75 ± 0.39 mag and a maximum pseudo-bolometric luminosity of L<SUB>max</SUB> = 6.03 ± 0.01 × 10<SUP>42</SUP> erg s<SUP>-1</SUP>. Spectroscopically, SN 2020cpg displays a weak high- and low-velocity H α feature during the photospheric phase of its evolution, suggesting that it contained a detached hydrogen envelope prior to explosion. From comparisons with spectral models, the mass of hydrogen within the outer envelope was constrained to be ~0.1 M<SUB>⊙</SUB>. From the pseudo-bolometric light curve of SN 2020cpg a <SUP>56</SUP>Ni mass of M<SUB>Ni</SUB> ~ 0.27 ± 0.08 M<SUB>⊙</SUB> was determined using an Arnett-like model. The ejecta mass and kinetic energy of SN 2020cpg were determined using an alternative method that compares the light curve of SN 2020cpg and several modelled SE-SNe, resulting in an ejecta mass of M<SUB>ejc</SUB> ~ 5.5 ± 2.0 M<SUB>⊙</SUB> and a kinetic energy of E<SUB>K</SUB> ~ 9.0 ± 3.0 × 10<SUP>51</SUP> erg. The ejected mass indicates a progenitor mass of 18-25 M<SUB>⊙</SUB>. The use of the comparative light curve method provides an alternative process to the commonly used Arnett-like model to determine the physical properties of SE-SNe.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorMedler, K.
dc.contributor.authorMazzali, P. A.
dc.contributor.authorTeffs, J.
dc.contributor.authorPrentice, S. J.
dc.contributor.authorAshall, C.
dc.contributor.authorAmenouche, M.
dc.contributor.authorAnderson, J. P.
dc.contributor.authorBurke, J.
dc.contributor.authorChen, T. W.
dc.contributor.authorGalbany, L.
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorGutiérrez, C. P.
dc.contributor.authorHiramatsu, D.
dc.contributor.authorHowell, D. A.
dc.contributor.authorInserra, C.
dc.contributor.authorKankare, E.
dc.contributor.authorMcCully, C.
dc.contributor.authorMüller-Bravo, T. E.
dc.contributor.authorNicholl, M.
dc.contributor.authorPellegrino, C.
dc.contributor.authorSollerman, J.
dc.date.accessioned2024-01-26T07:51:02Z
dc.date.available2024-01-26T07:51:02Z
dc.date.copyright2021-06-18
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume506
dc.identifier.doi10.1093/MNRAS/STAB1761
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/120072
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021MNRAS.506.1832M
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages1832-1849
dc.rightsOther
dc.sciencecloudnosend
dc.titleSN 2020cpg: an energetic link between Type IIb and Ib supernovae
dc.typeJournalArticle
dspace.entity.typePublication