Asymptotic Giant Brach Stars as Astroparticle Laboratories

Details Asymptotic Giant Brach Stars as Astroparticle Laboratories Asymptotic Giant Brach Stars as Astroparticle Laboratories

1999-05-05

arxiv.org/abs/astro-ph/9905033v1

Astronomy and Astrophysics

Astrophysics

8 pages, 3 tables, 8 figures, accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.1999.02633.x

We show that the inclusion of axion emission during stellar evolution introduces important changes into the evolutionary behaviour of AGB stars. The mass of the resulting C/O white dwarf is much lower than the equivalent obtained from standard evolution. This implies a deficit in luminous AGB stars and in massive WDs. Moreover the total mass processed in the nuclear burning shells that is dredged-up to the surface ($3^{rd} D_{up}$) increases when axion emission is included, modifying the chemical composition of the photosphere. We conclude that the AGB is a promising phase to put constraints on particle physics

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