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dc.creatorAnderson, J. P.
dc.creatorCovarrubias, R. A.
dc.creatorJames, P. A.
dc.creatorHamuy, M.
dc.creatorHabergham, S. M.
dc.date.accessioned2020-08-14T20:42:51Z
dc.date.available2020-08-14T20:42:51Z
dc.date.issued2010
dc.identifier.urihttp://hdl.handle.net/10533/245892
dc.description.abstractWe present constraints on the progenitor metallicities of core-collapse supernovae. To date, nearly all metallicity constraints have been inferred from indirect methods such as metallicity gradients in host galaxies, luminosities of host galaxies, or derived global galaxy metallicities. Here, progenitor metallicities are derived from optical spectra taken at the sites of nearby supernovae, from the ratio of strong emission lines found in their host HII regions.We present results from the spectra of 74 host HII regions and discuss the implications that these have on the nature of core-collapse supernova progenitors. Overall, while we find that the mean metallicity of type Ibc environments is higher than that of type II events, this difference is smaller than observed in previous studies. There is only a 0.06 dex difference in the mean metallicity values, at a statistical significance of ~1.5 sigma, while using a KS-test we find that the two metallicity distributions are marginally consistent with being drawn from the same parent population (probability >10%). This argues that progenitor metallicity is not a dominant parameter in deciding supernovae type, with progenitor mass and/or binarity playing a much more significant role.
dc.language.isoeng
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.relation.urihttps://arxiv.org/abs/1006.0968
dc.titleObservational constraints on the progenitor metallicities of core-collapse supernovae
dc.typeArticulo
dc.identifier.folio15010003
dc.description.conicytprogramFONDAP
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.title.journalMonthly Notices of the Royal Astronomical Society
dc.type.driverinfo:eu-repo/semantics/article
dc.description.shortconicytprogramFONDAP
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dc.description.centroCENASTRO


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