The born-again (very late thermal pulse) scenario revisited: The mass of the remnants and implications for V4334 Sgr

We present 1D numerical simulations of the very late thermal pulse (VLTP) scenario for a wide range of remnant masses. We show that by taking into account the different possible remnant masses, the observed evolution of V4334 Sgr (a.k.a. Sakurai's object) can be reproduced within the standard 1...

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Detalles Bibliográficos
Autores principales: Miller Bertolami, Marcelo Miguel, Althaus, Leandro Gabriel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Ciencias Astronómicas
Stars: AGB and post-AGB
Stars: evolution
Stars: individual: V4334 Sgr
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83028
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83028
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
Stars: AGB and post-AGB
Stars: evolution
Stars: individual: V4334 Sgr
spellingShingle Ciencias Astronómicas
Stars: AGB and post-AGB
Stars: evolution
Stars: individual: V4334 Sgr
Miller Bertolami, Marcelo Miguel
Althaus, Leandro Gabriel
The born-again (very late thermal pulse) scenario revisited: The mass of the remnants and implications for V4334 Sgr
topic_facet Ciencias Astronómicas
Stars: AGB and post-AGB
Stars: evolution
Stars: individual: V4334 Sgr
description We present 1D numerical simulations of the very late thermal pulse (VLTP) scenario for a wide range of remnant masses. We show that by taking into account the different possible remnant masses, the observed evolution of V4334 Sgr (a.k.a. Sakurai's object) can be reproduced within the standard 1D mixing length theory (MLT) stellar evolutionary models without the inclusion of any ad hoc reduced mixing efficiency. Our simulations hint at a consistent picture with present observations of V4334 Sgr. From energetics, and within the standard MLT approach, we show that low-mass remnants (M ≲ 0.6 M⊙) are expected to behave markedly differently from higher mass remnants (M ≳ 0.6 M⊙) in the sense that the latter remnants are not expected to expand significantly as a result of the violent H-burning that takes place during the VLTP. We also assess the discrepancy in the born-again times obtained by different authors by comparing the energy that can be liberated by H-burning during the VLTP event.
format Articulo
Articulo
author Miller Bertolami, Marcelo Miguel
Althaus, Leandro Gabriel
author_facet Miller Bertolami, Marcelo Miguel
Althaus, Leandro Gabriel
author_sort Miller Bertolami, Marcelo Miguel
title The born-again (very late thermal pulse) scenario revisited: The mass of the remnants and implications for V4334 Sgr
title_short The born-again (very late thermal pulse) scenario revisited: The mass of the remnants and implications for V4334 Sgr
title_full The born-again (very late thermal pulse) scenario revisited: The mass of the remnants and implications for V4334 Sgr
title_fullStr The born-again (very late thermal pulse) scenario revisited: The mass of the remnants and implications for V4334 Sgr
title_full_unstemmed The born-again (very late thermal pulse) scenario revisited: The mass of the remnants and implications for V4334 Sgr
title_sort born-again (very late thermal pulse) scenario revisited: the mass of the remnants and implications for v4334 sgr
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/83028
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