Mixing in Stars and the Evolution of the 3He Abundance

Details Mixing in Stars and the Evolution of the 3He Abundance Mixing in Stars and the Evolution of the 3He Abundance

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ssrv...84..199c&link_type=abstract

Space Science Reviews, v. 84, Issue 1/2, p. 199-206 (1998).

Physics

13

Nuclear Reactions, Nucleosynthesis, Abundances, Stars:Evolution, Interior, Rotation

Scientific paper

We first recall the observational and theoretical facts that constitute the so-called 3He problem. We then review the chemical anomalies that could be related to the destruction of 3He in red giants stars. We show how a simple consistent mechanism can lead to the destruction of 3He in low mass stars and simultaneously account for the low 12C/13C ratios and low lithium abundances observed in giant stars of different populations. This process should both naturally account for the recent measurements of 3He/H in galactic HII regions and allow for high values of 3He observed in some planetary nebulae. We propose a simple statistical estimation of the fraction of stars that may be affected by this process.

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