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Luminous Type II Short-Plateau Supernovae 2006Y, 2006ai, and 2016egz: A Transitional Class from Stripped Massive Red Supergiants

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cris.lastimport.scopus2024-02-12T20:54:43Z
dc.abstract.enThe diversity of Type II supernovae (SNe II) is thought to be driven mainly by differences in their progenitor's hydrogen-rich (H-rich) envelope mass, with SNe IIP having long plateaus (∼100 days) and the most massive H-rich envelopes. However, it is an ongoing mystery why SNe II with short plateaus (tens of days) are rarely seen. Here, we present optical/near-infrared photometric and spectroscopic observations of luminous Type II short-plateau SNe 2006Y, 2006ai, and 2016egz. Their plateaus of about 50-70 days and luminous optical peaks (≲-18.4 mag) indicate significant pre-explosion mass loss resulting in partially stripped H-rich envelopes and early circumstellar material (CSM) interaction. We compute a large grid of MESA+STELLA single-star progenitor and light-curve models with various progenitor zero-age main-sequence (ZAMS) masses, mass-loss efficiencies, explosion energies, <SUP>56</SUP>Ni masses, and CSM densities. Our model grid shows a continuous population of SNe IIP-IIL-IIb-like light-curve morphology in descending order of H-rich envelope mass. With large <SUP>56</SUP>Ni masses (≳0.05 M<SUB>⊙</SUB>), short-plateau SNe II lie in a confined parameter space as a transitional class between SNe IIL and IIb. For SNe 2006Y, 2006ai, and 2016egz, our findings suggest high-mass red supergiant (RSG) progenitors (M<SUB>ZAMS</SUB> ≃ 18-22 M<SUB>⊙</SUB>) with small H-rich envelope masses ( ${M}_{{{\rm{H}}}_{\mathrm{env}}}\simeq 1.7\,{M}_{\odot }$ ) that have experienced enhanced mass loss ( $\dot{M}\simeq {10}^{-2}\,{M}_{\odot }\,{\mathrm{yr}}^{-1}$ ) for the last few decades before the explosion. If high-mass RSGs result in rare short-plateau SNe II, then these events might ease some of the apparent underrepresentation of higher-luminosity RSGs in observed SN II progenitor samples.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorHiramatsu, Daichi
dc.contributor.authorHowell, D. Andrew
dc.contributor.authorMoriya, Takashi J.
dc.contributor.authorGoldberg, Jared A.
dc.contributor.authorHosseinzadeh, Griffin
dc.contributor.authorArcavi, Iair
dc.contributor.authorAnderson, Joseph P.
dc.contributor.authorGutiérrez, Claudia P.
dc.contributor.authorBurke, Jamison
dc.contributor.authorMcCully, Curtis
dc.contributor.authorValenti, Stefano
dc.contributor.authorGalbany, Lluís
dc.contributor.authorFang, Qiliang
dc.contributor.authorMaeda, Keiichi
dc.contributor.authorFolatelli, Gastón
dc.contributor.authorHsiao, Eric Y.
dc.contributor.authorMorrell, Nidia I.
dc.contributor.authorPhillips, Mark M.
dc.contributor.authorStritzinger, Maximilian D.
dc.contributor.authorSuntzeff, Nicholas B.
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorMaguire, Kate
dc.contributor.authorMüller-Bravo, Tomás E.
dc.contributor.authorYoung, David R.
dc.date.accessioned2024-01-25T05:29:55Z
dc.date.available2024-01-25T05:29:55Z
dc.date.copyright2020-10-29
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume913
dc.identifier.doi10.3847/1538-4357/ABF6D6
dc.identifier.issn0004-637X
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/111600
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021ApJ...913...55H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal
dc.relation.pages55
dc.rightsOther
dc.sciencecloudnosend
dc.titleLuminous Type II Short-Plateau Supernovae 2006Y, 2006ai, and 2016egz: A Transitional Class from Stripped Massive Red Supergiants
dc.typeJournalArticle
dspace.entity.typePublication