AGB evolution

Details AGB evolution AGB evolution

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..313..387h&link_type=abstract

Asymmetrical Planetary Nebulae III: Winds, Structure and the Thunderbird, Proceedings of the conference held 28 July - 1 August

Astronomy and Astrophysics

Astronomy

3

Scientific paper

Recent models of rotating Asymptotic Giant Branch stars have difficulties to account for observed s-process features in these stars. White dwarf rotation rates from asterioseismology may corroborate the impression that some important model ingredient is missing. In this context the proposal of Spruit (1998) is discussed that even weak magnetic fields enforce rigid rotation throughout the successive evolutionary phases. Rotationally induced mixing at the core-envelope interface of the AGB star may then be much weaker and only due to meridional circulation. The concept of the s-process in the interpulse phase under radiative conditions may then be reinstated, and even improved by means to account for the observed spread in s-process efficiency. I will also briefly review recent models of Z=0 AGB stars.

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