Destruction of 3He in Low Mass Stars and Implications for Chemical Evolution

Details Destruction of 3He in Low Mass Stars and Implications for Chemical Evolution Destruction of 3He in Low Mass Stars and Implications for Chemical Evolution

1995-12-22

arxiv.org/abs/astro-ph/9512147v1

Astronomy and Astrophysics

Astrophysics

Proceedings of the meeting "From Stars to Galaxies" Crete, 9-13 oct.1995, C.Leitherer, U.Fritze-von Alvensleben, L.Hucra eds,

Scientific paper

Recent observations of 3He/H in different environments tend to prove that 3He is not produced in low mass stars, contrary to the standard predictions of stellar evolution theory. We show how a simple consistent mechanism, namely rotation-induced mixing, 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.

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