Show simple item record 2016-09-28T15:33:44Z 2016-09-28T15:33:44Z
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.extent 5 p. es
dcterms.issued 2014-10
dcterms.language Inglés es
dcterms.license Attribution 4.0 International (BY 4.0) es
dcterms.publisher IOP science es
cic.version info:eu-repo/semantics/submittedVersion es Folatelli, Gastón es Bersten, Melina es Benvenuto, Omar Gustavo es Van Dyk, Schuyler D. es Kuncarayakti, Hanindyo es Maeda, Keiichi es Nozawa, Takaya es Nomoto, Ken'ichi es Hamuy, Mario es Quimby, Robert M. es
cic.lugarDesarrollo Universidad Nacional de La Plata es
dcterms.subject.materia Astronomía es
dcterms.identifier.url Documento completo es
dcterms.identifier.other doi:10.1088/2041-8205/793/2/L22 es
dcterms.isPartOf.item Informe científico de investigador: Benvenuto, Omar Gustavo (2014-2015) es
dcterms.isPartOf.issue vol. 793 es
dcterms.isPartOf.series Astrophysical Journal Letters es
cic.isPeerReviewed true es
cic.isFulltext true es


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