White dwarf mergers and the origin of R Coronae Borealis stars

Details White dwarf mergers and the origin of R Coronae Borealis stars White dwarf mergers and the origin of R Coronae Borealis stars

2011-10-09

arxiv.org/abs/1110.1855v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Proceedings of the 2011 Cefalu meeting "Advances in Computational Astrophysics: methods, tools and outcomes"

Scientific paper

We present a nucleosynthesis study of the merger of a 0.4 solar masses helium white dwarf with a 0.8 solar masses carbon-oxygen white dwarf, 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.

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