A binary progenitor for the type IIb supernova 2011dh in M51

We perform binary stellar evolutionary calculations following the simultaneous evolution of both stars in the system to study a potential progenitor system for the Type IIb supernova 2011dh. Pre-explosion photometry as well as light-curve modeling has provided constraints on the physical properties...

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Detalles Bibliográficos
Autores principales: Benvenuto, Omar Gustavo, Bersten, Melina Cecilia, Nomoto, Ken’ichi
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Astronómicas
binaries: close
stars: evolution
supernovae: general
supernovae: individual (SN 2011dh)
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85516
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85516
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
stars: evolution
supernovae: general
supernovae: individual (SN 2011dh)
spellingShingle Ciencias Astronómicas
binaries: close
stars: evolution
supernovae: general
supernovae: individual (SN 2011dh)
Benvenuto, Omar Gustavo
Bersten, Melina Cecilia
Nomoto, Ken’ichi
A binary progenitor for the type IIb supernova 2011dh in M51
topic_facet Ciencias Astronómicas
binaries: close
stars: evolution
supernovae: general
supernovae: individual (SN 2011dh)
description We perform binary stellar evolutionary calculations following the simultaneous evolution of both stars in the system to study a potential progenitor system for the Type IIb supernova 2011dh. Pre-explosion photometry as well as light-curve modeling has provided constraints on the physical properties of the progenitor system. Here, we present a close binary system (CBS) that is compatible with such constraints. The system is formed by stars of solar composition with 16 M⊙ + 10 M⊙ on a circular orbit with an initial period of 125 days. The primary star ends its evolution as a yellow supergiant with a mass of ≈4 M⊙, a final hydrogen content of ≈(3-5) × 10<SUP>-3</SUP> M⊙, and with an effective temperature and luminosity in agreement with the <i>Hubble Space Telescope</i> (<i>HST</i>) pre-explosion observations of SN 2011dh. These results are nearly insensitive to the adopted accretion efficiency factor β. At the time of explosion, the companion star has an effective temperature of 22,000-40,000 K, depending on the value of β, and lies near the zero-age main sequence. Considering the uncertainties in the <i>HST</i> pre-SN photometry, the secondary star is only marginally detectable in the bluest observed band. CBSs, as opposed to single stars, provide a natural frame to explain the properties of SN 2011dh.
format Articulo
Articulo
author Benvenuto, Omar Gustavo
Bersten, Melina Cecilia
Nomoto, Ken’ichi
author_facet Benvenuto, Omar Gustavo
Bersten, Melina Cecilia
Nomoto, Ken’ichi
author_sort Benvenuto, Omar Gustavo
title A binary progenitor for the type IIb supernova 2011dh in M51
title_short A binary progenitor for the type IIb supernova 2011dh in M51
title_full A binary progenitor for the type IIb supernova 2011dh in M51
title_fullStr A binary progenitor for the type IIb supernova 2011dh in M51
title_full_unstemmed A binary progenitor for the type IIb supernova 2011dh in M51
title_sort binary progenitor for the type iib supernova 2011dh in m51
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85516
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bdutipo_str Repositorios
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