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SN 2017ens: The Metamorphosis of a Luminous Broadlined Type Ic Supernova into an SN IIn

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cris.lastimport.scopus2024-02-12T20:56:58Z
dc.abstract.enWe present observations of supernova (SN) 2017ens, discovered by the ATLAS survey and identified as a hot blue object through the GREAT program. The redshift z = 0.1086 implies a peak brightness of M <SUB> g </SUB> = -21.1 mag, placing the object within the regime of superluminous supernovae. We observe a dramatic spectral evolution, from initially being blue and featureless, to later developing features similar to those of the broadlined Type Ic SN 1998bw, and finally showing Ėœ2000 km s<SUP>-1</SUP> wide HĪ± and HĪ² emission. Relatively narrow Balmer emission (reminiscent of a SN IIn) is present at all times. We also detect coronal lines, indicative of a dense circumstellar medium. We constrain the progenitor wind velocity to Ėœ50-60 km s<SUP>-1</SUP> based on P-Cygni profiles, which is far slower than those present in Wolf-Rayet stars. This may suggest that the progenitor passed through a luminous blue variable phase, or that the wind is instead from a binary companion red supergiant star. At late times we see the Ėœ2000 km s<SUP>-1</SUP> wide HĪ± emission persisting at high luminosity (Ėœ3 Ɨ 10<SUP>40</SUP> erg s<SUP>-1</SUP>) for at least 100 day, perhaps indicative of additional mass loss at high velocities that could have been ejected by a pulsational pair instability.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorChen, T. -W.
dc.contributor.authorInserra, C.
dc.contributor.authorFraser, M.
dc.contributor.authorMoriya, T. J.
dc.contributor.authorSchady, P.
dc.contributor.authorSchweyer, T.
dc.contributor.authorFilippenko, A. V.
dc.contributor.authorPerley, D. A.
dc.contributor.authorRuiter, A. J.
dc.contributor.authorSeitenzahl, I.
dc.contributor.authorSollerman, J.
dc.contributor.authorTaddia, F.
dc.contributor.authorAnderson, J. P.
dc.contributor.authorFoley, R. J.
dc.contributor.authorJerkstrand, A.
dc.contributor.authorNgeow, C. -C.
dc.contributor.authorPan, Y. -C.
dc.contributor.authorPastorello, A.
dc.contributor.authorPoints, S.
dc.contributor.authorSmartt, S. J.
dc.contributor.authorSmith, K. W.
dc.contributor.authorTaubenberger, S.
dc.contributor.authorWiseman, P.
dc.contributor.authorYoung, D. R.
dc.contributor.authorBenetti, S.
dc.contributor.authorBerton, M.
dc.contributor.authorBufano, F.
dc.contributor.authorClark, P.
dc.contributor.authorValle, M. Della
dc.contributor.authorGalbany, L.
dc.contributor.authorGal-Yam, A.
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorGutiƩrrez, C. P.
dc.contributor.authorHeinze, A.
dc.contributor.authorKankare, E.
dc.contributor.authorKilpatrick, C. D.
dc.contributor.authorKuncarayakti, H.
dc.contributor.authorLeloudas, G.
dc.contributor.authorLin, Z. -Y.
dc.contributor.authorMaguire, K.
dc.contributor.authorMazzali, P.
dc.contributor.authorMcBrien, O.
dc.contributor.authorPrentice, S. J.
dc.contributor.authorRau, A.
dc.contributor.authorRest, A.
dc.contributor.authorSiebert, M. R.
dc.contributor.authorStalder, B.
dc.contributor.authorTonry, J. L.
dc.contributor.authorYu, P. -C.
dc.date.accessioned2024-01-26T07:50:07Z
dc.date.available2024-01-26T07:50:07Z
dc.date.copyright2018-08-13
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume867
dc.identifier.doi10.3847/2041-8213/AAEB2E
dc.identifier.issn2041-8205
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/120060
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018ApJ...867L..31C
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal Letters
dc.relation.pagesL31
dc.rightsOther
dc.sciencecloudnosend
dc.titleSN 2017ens: The Metamorphosis of a Luminous Broadlined Type Ic Supernova into an SN IIn
dc.typeJournalArticle
dspace.entity.typePublication