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A long life of excess: The interacting transient SN 2017hcc

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dc.abstract.enIn this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 ± 2 days, ATLAS o band) and high luminosity (peaking at −20.78 ± 0.01 mag in the ATLAS o band) point towards an interaction of massive ejecta with massive and dense circumstellar material (CSM). The evolution of SN 2017hcc is slow, both spectroscopically and photometrically, reminiscent of the long-lived type IIn, SN 2010jl. An infrared (IR) excess was apparent soon after the peak, and blueshifts were noticeable in the Balmer lines starting from a few hundred days, but appeared to be fading by around +1200 d. We posit that an IR light echo from pre-existing dust dominates at early times, with some possible condensation of new dust grains occurring at epochs ≳+800 d.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorMoran, S.
dc.contributor.authorFraser, M.
dc.contributor.authorKotak, R.
dc.contributor.authorPastorello, A.
dc.contributor.authorBenetti, S.
dc.contributor.authorBrennan, S. J.
dc.contributor.authorGutiérrez, C. P.
dc.contributor.authorKankare, E.
dc.contributor.authorKuncarayakti, H.
dc.contributor.authorMattila, S.
dc.contributor.authorReynolds, T. M.
dc.contributor.authorAnderson, J. P.
dc.contributor.authorBrown, P. J.
dc.contributor.authorCampana, S.
dc.contributor.authorChambers, K. C.
dc.contributor.authorChen, T. -W.
dc.contributor.authorValle, M. Della
dc.contributor.authorDennefeld, M.
dc.contributor.authorElias-Rosa, N.
dc.contributor.authorGalbany, L.
dc.contributor.authorGalindo-Guil, F. J.
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorHiramatsu, D.
dc.contributor.authorInserra, C.
dc.contributor.authorLeloudas, G.
dc.contributor.authorMüller-Bravo, T. E.
dc.contributor.authorNicholl, M.
dc.contributor.authorReguitti, A.
dc.contributor.authorShahbandeh, M.
dc.contributor.authorSmartt, S. J.
dc.contributor.authorTartaglia, L.
dc.contributor.authorYoung, D. R.
dc.date.accessioned2024-01-24T17:49:05Z
dc.date.available2024-01-24T17:49:05Z
dc.date.copyright2023-01-05
dc.date.issued2023
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.versionFINAL_PUBLISHED
dc.description.volume669
dc.identifier.doi10.1051/0004-6361/202244565
dc.identifier.issn0004-6361
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/101626
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2023A&A...669A..51M
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomy and Astrophysics
dc.relation.pagesA51
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleA long life of excess: The interacting transient SN 2017hcc
dc.typeJournalArticle
dspace.entity.typePublication