Artículo
Nucleosynthesis during the merger of white dwarfs and the origin of R Coronae Borealis stars
Longland, Richard; Loren Aguilar, P.; Jose, J.; Garcia Berro, E.; Althaus, Leandro Gabriel
; Isern, J.
Fecha de publicación:
08/2011
Editorial:
Iop Publishing
Revista:
Astrophysical Journal
ISSN:
0004-637X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
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 ☉ helium white dwarf with a 0.8 M ☉ 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.
Palabras clave:
Nuclear Reactions
,
Nucleosynthesis
,
Agb Stars
,
White Dwarfs
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Identificadores
Colecciones
Articulos(IALP)
Articulos de INST.DE ASTROFISICA LA PLATA
Articulos de INST.DE ASTROFISICA LA PLATA
Citación
Longland, Richard; Loren Aguilar, P.; Jose, J.; Garcia Berro, E.; Althaus, Leandro Gabriel; et al.; Nucleosynthesis during the merger of white dwarfs and the origin of R Coronae Borealis stars; Iop Publishing; Astrophysical Journal; 737; 8-2011; 34-37
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