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

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorChen, T. W.en_US
dc.contributor.authorInserra, C.en_US
dc.contributor.authorFraser, M.en_US
dc.contributor.authorMoriya, T. J.en_US
dc.contributor.authorSchady, P.en_US
dc.contributor.authorSchweyer, T.en_US
dc.contributor.authorFilippenko, A. V.en_US
dc.contributor.authorPerley, D. A.en_US
dc.contributor.authorRuiter, A. J.en_US
dc.contributor.authorSeitenzahl, I.en_US
dc.contributor.authorSollerman, J.en_US
dc.contributor.authorTaddia, F.en_US
dc.contributor.authorAnderson, J. P.en_US
dc.contributor.authorFoley, R. J.en_US
dc.contributor.authorJerkstrand, A.en_US
dc.contributor.authorNgeow, C. C.en_US
dc.contributor.authorPan, Y. C.en_US
dc.contributor.authorPastorello, A.en_US
dc.contributor.authorPoints, S.en_US
dc.contributor.authorSmartt, S. J.en_US
dc.contributor.authorSmith, K. W.en_US
dc.contributor.authorTaubenberger, S.en_US
dc.contributor.authorWiseman, P.en_US
dc.contributor.authorYoung, D. R.en_US
dc.contributor.authorBenetti, S.en_US
dc.contributor.authorBerton, M.en_US
dc.contributor.authorBufano, F.en_US
dc.contributor.authorClark, P.en_US
dc.contributor.authorValle, M. Dellaen_US
dc.contributor.authorGalbany, L.en_US
dc.contributor.authorGal-Yam, A.en_US
dc.contributor.authorGromadzki, M.en_US
dc.contributor.authorGutiérrez, C. P.en_US
dc.contributor.authorHeinze, A.en_US
dc.contributor.authorKankare, E.en_US
dc.contributor.authorKilpatrick, C. D.en_US
dc.contributor.authorKuncarayakti, H.en_US
dc.contributor.authorLeloudas, G.en_US
dc.contributor.authorLin, Z. Y.en_US
dc.contributor.authorMaguire, K.en_US
dc.contributor.authorMazzali, P.en_US
dc.contributor.authorMcBrien, O.en_US
dc.contributor.authorPrentice, S. J.en_US
dc.contributor.authorRau, A.en_US
dc.contributor.authorRest, A.en_US
dc.contributor.authorSiebert, M. R.en_US
dc.contributor.authorStalder, B.en_US
dc.contributor.authorTonry, J. L.en_US
dc.contributor.authorYu, P. C.en_US
dc.contributor.departmentMetsähovi Radio Observatoryen
dc.contributor.organizationMax Planck Institute for Extraterrestrial Physicsen_US
dc.contributor.organizationUniversity of Southamptonen_US
dc.contributor.organizationUniversity College Dublinen_US
dc.contributor.organizationNational Astronomical Observatory of Japanen_US
dc.contributor.organizationUniversity of California, Berkeleyen_US
dc.contributor.organizationLiverpool John Moores Universityen_US
dc.contributor.organizationUniversity of New South Walesen_US
dc.contributor.organizationStockholm Universityen_US
dc.contributor.organizationEuropean Southern Observatoryen_US
dc.contributor.organizationUniversity of California, Santa Cruzen_US
dc.contributor.organizationMax Planck Institute for Astrophysicsen_US
dc.contributor.organizationNational Central Universityen_US
dc.contributor.organizationINAF - Osservatorio Astronomico di Padovaen_US
dc.contributor.organizationNational Optical Astronomy Observatoryen_US
dc.contributor.organizationQueen's University Belfasten_US
dc.contributor.organizationINAF - Osservatorio Astrofisico di Cataniaen_US
dc.contributor.organizationOsservatorio Astronomico di Capodimonteen_US
dc.contributor.organizationUniversity of Pittsburghen_US
dc.contributor.organizationWeizmann Institute of Scienceen_US
dc.contributor.organizationUniversity of Warsawen_US
dc.contributor.organizationUniversity of Hawai’i at Manoaen_US
dc.contributor.organizationUniversity of Turkuen_US
dc.contributor.organizationTechnical University of Denmarken_US
dc.contributor.organizationSpace Telescope Science Instituteen_US
dc.date.accessioned2018-12-10T10:28:32Z
dc.date.available2018-12-10T10:28:32Z
dc.date.issued2018-11-10en_US
dc.description.abstractWe 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 g = -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 ∼2000 km s-1 wide Hα and Hβ 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 ∼50-60 km s-1 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 ∼2000 km s-1 wide Hα emission persisting at high luminosity (∼3 × 1040 erg s-1) for at least 100 day, perhaps indicative of additional mass loss at high velocities that could have been ejected by a pulsational pair instability.en
dc.description.versionPeer revieweden
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationChen, T W, Inserra, C, Fraser, M, Moriya, T J, Schady, P, Schweyer, T, Filippenko, A V, Perley, D A, Ruiter, A J, Seitenzahl, I, Sollerman, J, Taddia, F, Anderson, J P, Foley, R J, Jerkstrand, A, Ngeow, C C, Pan, Y C, Pastorello, A, Points, S, Smartt, S J, Smith, K W, Taubenberger, S, Wiseman, P, Young, D R, Benetti, S, Berton, M, Bufano, F, Clark, P, Valle, M D, Galbany, L, Gal-Yam, A, Gromadzki, M, Gutiérrez, C P, Heinze, A, Kankare, E, Kilpatrick, C D, Kuncarayakti, H, Leloudas, G, Lin, Z Y, Maguire, K, Mazzali, P, McBrien, O, Prentice, S J, Rau, A, Rest, A, Siebert, M R, Stalder, B, Tonry, J L & Yu, P C 2018, ' SN 2017ens : The Metamorphosis of a Luminous Broadlined Type Ic Supernova into an SN IIn ', Astrophysical Journal Letters, vol. 867, no. 2, L31 . https://doi.org/10.3847/2041-8213/aaeb2een
dc.identifier.doi10.3847/2041-8213/aaeb2een_US
dc.identifier.issn2041-8205
dc.identifier.issn2041-8213
dc.identifier.otherPURE UUID: bad22f27-f69d-4391-a592-15134e04cdaden_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/bad22f27-f69d-4391-a592-15134e04cdaden_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85056739355&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/30132222/ELEC_Chen_2018_ApJL_867_L31.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/35241
dc.identifier.urnURN:NBN:fi:aalto-201812106256
dc.language.isoenen
dc.relation.ispartofseriesAstrophysical Journal Lettersen
dc.relation.ispartofseriesVolume 867, issue 2en
dc.rightsopenAccessen
dc.subject.keywordsupernovae: generalen_US
dc.subject.keywordsupernovae: individual (SN 2017ens)en_US
dc.titleSN 2017ens: The Metamorphosis of a Luminous Broadlined Type Ic Supernova into an SN IInen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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