A Blue Point Source at the Location of Supernova 2011dh

cic.isFulltexttruees
cic.isPeerReviewedtruees
cic.lugarDesarrolloUniversidad Nacional de La Plata es
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dc.date.accessioned2016-09-28T15:33:44Z
dc.date.available2016-09-28T15:33:44Z
dc.identifier.urihttps://digital.cic.gba.gob.ar/handle/11746/4335
dc.titleA Blue Point Source at the Location of Supernova 2011dhen
dc.typeArtículoes
dcterms.abstractWe present Hubble Space Telescope (HST) observations of the field of the Type IIb supernova (SN) 2011dh in M51 performed at ≈1161 rest-frame days after explosion using the Wide Field Camera 3 and near-UV filters F225W and F336W. A star-like object is detected in both bands and the photometry indicates it has negative (F225W – F336W) color. The observed object is compatible with the companion of the now-vanished yellow supergiant progenitor predicted in interacting binary models. We consider it unlikely that the SN is undergoing strong interaction and thus estimate that it makes a small contribution to the observed flux. The possibilities of having detected an unresolved light echo or an unrelated object are briefly discussed and judged unlikely. Adopting a possible range of extinction by dust, we constrain parameters of the proposed binary system. In particular, the efficiency of mass accretion onto the binary companion must be below 50%, if no significant extinction is produced by newly formed dust. Further multiband observations are required in order to confirm the identification of the object as the companion star. If confirmed, the companion star would already be dominant in the UV-optical regime, so it would readily provide a unique opportunity to perform a detailed study of its properties.en
dcterms.creator.authorFolatelli, Gastónes
dcterms.creator.authorBersten, Melinaes
dcterms.creator.authorBenvenuto, Omar Gustavoes
dcterms.creator.authorVan Dyk, Schuyler D.es
dcterms.creator.authorKuncarayakti, Hanindyoes
dcterms.creator.authorMaeda, Keiichies
dcterms.creator.authorNozawa, Takayaes
dcterms.creator.authorNomoto, Ken'ichies
dcterms.creator.authorHamuy, Marioes
dcterms.creator.authorQuimby, Robert M.es
dcterms.extent5 p.es
dcterms.identifier.otherdoi:10.1088/2041-8205/793/2/L22es
dcterms.identifier.urlDocumento completoes
dcterms.isPartOf.issuevol. 793es
dcterms.isPartOf.itemInforme científico de investigador: Benvenuto, Omar Gustavo (2014-2015)es
dcterms.isPartOf.seriesAstrophysical Journal Letterses
dcterms.issued2014-10
dcterms.languageIngléses
dcterms.licenseAttribution 4.0 International (BY 4.0)es
dcterms.publisherIOP sciencees
dcterms.subject.materiaAstronomíaes
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