A Blue Point Source at the Location of Supernova 2011dh

cic.isFulltext true es
cic.isPeerReviewed true es
cic.lugarDesarrollo Universidad Nacional de La Plata es
cic.version info:eu-repo/semantics/submittedVersion es
dc.date.accessioned 2016-09-28T15:33:44Z
dc.date.available 2016-09-28T15:33:44Z
dc.identifier.uri https://digital.cic.gba.gob.ar/handle/11746/4335
dc.title A Blue Point Source at the Location of Supernova 2011dh en
dc.type Artículo es
dcterms.abstract We 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.author Folatelli, Gastón es
dcterms.creator.author Bersten, Melina es
dcterms.creator.author Benvenuto, Omar Gustavo es
dcterms.creator.author Van Dyk, Schuyler D. es
dcterms.creator.author Kuncarayakti, Hanindyo es
dcterms.creator.author Maeda, Keiichi es
dcterms.creator.author Nozawa, Takaya es
dcterms.creator.author Nomoto, Ken'ichi es
dcterms.creator.author Hamuy, Mario es
dcterms.creator.author Quimby, Robert M. es
dcterms.extent 5 p. es
dcterms.identifier.other doi:10.1088/2041-8205/793/2/L22 es
dcterms.identifier.url Documento completo es
dcterms.isPartOf.issue vol. 793 es
dcterms.isPartOf.item Informe científico de investigador: Benvenuto, Omar Gustavo (2014-2015) es
dcterms.isPartOf.series Astrophysical Journal Letters es
dcterms.issued 2014-10
dcterms.language Inglés es
dcterms.license Attribution 4.0 International (BY 4.0) es
dcterms.publisher IOP science es
dcterms.subject.materia Astronomía es
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