Signatures of an eruptive phase before the explosion of the peculiar core-collapse SN 2013gc

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dc.contributor.authorReguitti, Andrea
dc.contributor.authorPastorello, A.
dc.contributor.authorPignata, G.
dc.contributor.authorBenetti, S.
dc.contributor.authorCappellaro, E.
dc.contributor.authorTuratto, M.
dc.contributor.authorAgliozzo, C.
dc.contributor.authorBufano, F.
dc.contributor.authorMorrell, N. I.
dc.contributor.authorOlivares E., F.
dc.contributor.authorReichart, D. E.
dc.contributor.authorHaislip, J. B.
dc.contributor.authorKouprianov, V.
dc.contributor.authorSmartt, S. J.
dc.contributor.authorCiroi, S.
dc.date.accessioned2023-04-17T19:02:34Z
dc.date.available2023-04-17T19:02:34Z
dc.date.issued2019-01
dc.descriptionIndexación Scopuses
dc.description.abstractWe present photometric and spectroscopic analysis of the peculiar core-collapse supernova (SN) 2013gc, spanning 7 yr of observations. The light curve shows an early maximum followed by a fast decline and a phase of almost constant luminosity. At +200 d from maximum, a brightening of 1 mag is observed in all bands, followed by a steep linear luminosity decline after +300 d. In archival images taken between 1.5 and 2.5 yr before the explosion, a weak source is visible at the supernova location, with mag ≈20. The early supernova spectra show Balmer lines, with a narrow (∼560 km s-1) P-Cygni absorption superimposed on a broad (∼3400 km s-1) component, typical of Type IIn events. Through a comparison of colour curves, absolute light curves, and spectra of SN 2013gc with a sample of supernovae IIn, we conclude that SN 2013gc is a member of the so-called Type IId subgroup. The complex profile of the Hα line suggests a composite circumstellar medium geometry, with a combination of lower velocity, spherically symmetric gas, and a more rapidly expanding bilobed feature. This circumstellar medium distribution has been likely formed through major mass-loss events that we directly observed from 3 yr before the explosion. The modest luminosity (MI ∼-16.5 near maximum) of SN 2013gc at all phases, the very small amount of ejected 56Ni (of the order of 10-3 M⊙), the major pre-supernova stellar activity, and the lack of prominent [O I] lines in the late-time spectra support a fall-back core-collapse scenario for the massive progenitor of SN 2013gc.es
dc.identifier.citationMonthly Notices of the Royal Astronomical Society Volume 482, Issue 2, Pages 2750 - 2769 January 2019es
dc.identifier.doi10.1093/mnras/sty2870en
dc.identifier.issn0035-8711
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/48627
dc.language.isoenes
dc.publisherMonthly Notices of the Royal Astronomical Societyes
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectSupernovae: generales
dc.subjectSupernovae: individual: SN2013gces
dc.subjectSN1994ajes
dc.subjectSN1996ales
dc.subjectSN1996Les
dc.subjectSN2000Pes
dc.titleSignatures of an eruptive phase before the explosion of the peculiar core-collapse SN 2013gces
dc.typeArtículoes
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