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dc.contributor.authorCartier, Regis
dc.contributor.authorFoster, Francisco
dc.contributor.authorCoppi, Paolo
dc.contributor.authorHamuy, Mario
dc.contributor.authorMaeda, Keiichi
dc.contributor.authorPignata, Guiliano
dc.contributor.authorFolatelli, Gastón
dc.date.accessioned2013-12-30T18:50:59Z
dc.date.accessioned2016-05-24T20:20:03Z
dc.date.available2013-12-30T18:50:59Z
dc.date.available2016-05-24T20:20:03Z
dc.date.issued2011
dc.identifier.citationpre printes
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/2296
dc.description.abstractFrom a sample of 12 well-observed Type Ia supernovae, we find clear evidence of correlations between early phase (U − B), (V − R), and (V − I) colors and the velocity shifts of the [Fe II] λ7155 and [Ni II] λ7378 nebular lines measured from late-phase spectra. As these lines are thought to trace the ashes of the initial deflagration process, our findings provide additional support to the new paradigm of off-center explosions in Type Ia supernovae, and we interpret these correlations as viewing angle effects in the observed colors. We also show that the nebular velocity shifts are related to the strength and width of the Ca II H&K and IR-triplet lines near-maximum light. The evidence presented here implies that the viewing angle must be taken into account when deriving extinction values and distances in future cosmological studies based on Type Ia supernovae.es
dc.language.isoenes
dc.subjectSupernovaees
dc.subjectDistance scalees
dc.titleA study of the color diversity around maximum light in Type Ia supernovaeen
dc.typeArtículo de revistaes


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