A blue point source at the location of supernova 2011DH

We present <i>Hubble Space Telescope</i> (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...

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Autores principales: Folatelli, Gastón, Bersten, Melina Cecilia, Benvenuto, Omar Gustavo, Van Dyk, Schuyler D., Kuncarayakti, Hanindyo, Maeda, Keiichi, Nozawa, Takaya, Nomoto, Ken’ichi, Hamuy, Mario, Quimby, Robert M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Astronómicas
binaries: close
supernovae: general
supernovae: individual (SN 2011dh)
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84973
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84973
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
binaries: close
supernovae: general
supernovae: individual (SN 2011dh)
spellingShingle Ciencias Astronómicas
binaries: close
supernovae: general
supernovae: individual (SN 2011dh)
Folatelli, Gastón
Bersten, Melina Cecilia
Benvenuto, Omar Gustavo
Van Dyk, Schuyler D.
Kuncarayakti, Hanindyo
Maeda, Keiichi
Nozawa, Takaya
Nomoto, Ken’ichi
Hamuy, Mario
Quimby, Robert M.
A blue point source at the location of supernova 2011DH
topic_facet Ciencias Astronómicas
binaries: close
supernovae: general
supernovae: individual (SN 2011dh)
description We present <i>Hubble Space Telescope</i> (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.
format Articulo
Articulo
author Folatelli, Gastón
Bersten, Melina Cecilia
Benvenuto, Omar Gustavo
Van Dyk, Schuyler D.
Kuncarayakti, Hanindyo
Maeda, Keiichi
Nozawa, Takaya
Nomoto, Ken’ichi
Hamuy, Mario
Quimby, Robert M.
author_facet Folatelli, Gastón
Bersten, Melina Cecilia
Benvenuto, Omar Gustavo
Van Dyk, Schuyler D.
Kuncarayakti, Hanindyo
Maeda, Keiichi
Nozawa, Takaya
Nomoto, Ken’ichi
Hamuy, Mario
Quimby, Robert M.
author_sort Folatelli, Gastón
title A blue point source at the location of supernova 2011DH
title_short A blue point source at the location of supernova 2011DH
title_full A blue point source at the location of supernova 2011DH
title_fullStr A blue point source at the location of supernova 2011DH
title_full_unstemmed A blue point source at the location of supernova 2011DH
title_sort blue point source at the location of supernova 2011dh
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/84973
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