Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars

Many hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we pre...

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Detalles Bibliográficos
Autores principales:	Longland, R., Lorén-Aguilar, P., José, J., García-Berro, E., Althaus, Leandro Gabriel, Isern, J.
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2011
Materias:	Ciencias Astronómicas nuclear reactions, nucleosynthesis, abundances stars: AGB and post-AGB white dwarfs
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/84192
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-84192
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 nuclear reactions, nucleosynthesis, abundances stars: AGB and post-AGB white dwarfs
spellingShingle	Ciencias Astronómicas nuclear reactions, nucleosynthesis, abundances stars: AGB and post-AGB white dwarfs Longland, R. Lorén-Aguilar, P. José, J. García-Berro, E. Althaus, Leandro Gabriel Isern, J. Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
topic_facet	Ciencias Astronómicas nuclear reactions, nucleosynthesis, abundances stars: AGB and post-AGB white dwarfs
description	Many hydrogen-deficient stars are characterized by surface abundance patterns that are hard to reconcile with conventional stellar evolution. Instead, it has been suggested that they may represent the result of a merger episode between a helium and a carbon-oxygen white dwarf. In this Letter, we present a nucleosynthesis study of the merger of a 0.4 M O helium white dwarf with a 0.8 M O carbon-oxygen white dwarf, by coupling the thermodynamic history of Smoothed Particle Hydrodynamics particles with a post-processing code. The resulting chemical abundance pattern, particularly for oxygen and fluorine, is in qualitative agreement with the observed abundances in R Coronae Borealis stars.
format	Articulo Articulo
author	Longland, R. Lorén-Aguilar, P. José, J. García-Berro, E. Althaus, Leandro Gabriel Isern, J.
author_facet	Longland, R. Lorén-Aguilar, P. José, J. García-Berro, E. Althaus, Leandro Gabriel Isern, J.
author_sort	Longland, R.
title	Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_short	Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_full	Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_fullStr	Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_full_unstemmed	Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars
title_sort	nucleosynthesis during the merger of white dwarfs and the origin of r coronae borealis stars
publishDate	2011
url	http://sedici.unlp.edu.ar/handle/10915/84192
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Nucleosynthesis during the merger of white dwarfs and the origin of R coronae borealis stars

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