On Type IIn/Ia-CSM supernovae as exemplified by SN 2012ca

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dc.contributor.authorInserra, C.
dc.contributor.authorFraser, M.
dc.contributor.authorSmartt, S. J.
dc.contributor.authorBenetti, S.
dc.contributor.authorChen, T.-W.
dc.contributor.authorChildress, M.
dc.contributor.authorGal-Yam, A.
dc.contributor.authorHowell, D. A.
dc.contributor.authorKangas, T.
dc.contributor.authorPignata, G.
dc.contributor.authorPolshaw, J.
dc.contributor.authorSullivan, M.
dc.contributor.authorSmith, K. W.
dc.contributor.authorValenti, S.
dc.contributor.authorYoung, D. R.
dc.contributor.authorParker, S.
dc.contributor.authorSeccull, T.
dc.contributor.authorMcCrum, M.
dc.date.accessioned2017-01-27T19:52:03Z
dc.date.available2017-01-27T19:52:03Z
dc.date.issued2016-07
dc.descriptionIndexación: Web of Sciencees
dc.description.abstractWe present the complete set of ultra-violet, optical and near-infrared photometry and spectroscopy for SN 2012ca, covering the period from 6 d prior to maximum light, until 531 d after maximum. The spectroscopic time series for SN 2012ca is essentially unchanged over 1.5 yr, and appear to be dominated at all epochs by signatures of interaction with a dense circumstellar medium (CSM) rather than the underlying supernova (SN). SN 2012ca is a member of the set of type of the ambiguous IIn/Ia-CSM SNe, the nature of which have been debated extensively in the literature. The two leading scenarios are either a Type Ia SN exploding within a dense CSM from a non-degenerate, evolved companion, or a core-collapse SN from a massive star. While some members of the population have been unequivocally associated with Type Ia SNe, in other cases the association is less certain. While it is possible that SN 2012ca does arise from a thermonuclear SN, this would require a relatively high (between 20 and 70 per cent) efficiency in converting kinetic energy to optical luminosity, and a massive (∼2.3–2.6 M⊙) circumstellar medium. On the basis of energetics, and the results of simple modelling, we suggest that SN 2012ca is more likely associated with a core-collapse SN. This would imply that the observed set of similar SNe to SN 2012ca is in fact originated by two populations, and while these are drawn from physically distinct channels, they can have observationally similar properties.es
dc.description.urihttps://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stw825
dc.identifier.citationMNRAS (2016) 459 (3): 2721-2740es
dc.identifier.issn0035-8711
dc.identifier.otherhttps://doi.org/10.1093/mnras/stw825
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/2785
dc.language.isoenes
dc.publisherOXFORD UNIV PRESSes
dc.subjectSupernovae: generales
dc.subjectSsupernovae: individual: SN 2012caes
dc.subjectSN 1997cyes
dc.subjectSN 1999Ees
dc.subjectSN 2002ices
dc.subjectSN 2005gjes
dc.subjectPTF11kxes
dc.titleOn Type IIn/Ia-CSM supernovae as exemplified by SN 2012caes
dc.typeArtículoes
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