Issue |
A&A
Volume 441, Number 3, October III 2005
|
|
---|---|---|
Page(s) | 1129 - 1133 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20053084 | |
Published online | 23 September 2005 |
Influence of two updated nuclear reaction rates on the evolution of low and intermediate mass stars
1
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85748 Garching, Germany e-mail: weiss@mpa-garching.mpg.de
2
Institute for Advanced Study, Einstein Drive, Princeton NJ 08540, USA
3
Institut for Fysik og Astronomi, Aarhus Universitet, Bygn. 520, Ny Munkegade, 8000 Aarhus C, Denmark
Received:
18
March
2005
Accepted:
19
July
2005
Two key reactions of hydrostatic nuclear burning in stars
have recently been revised by new experimental data – the
and
reaction rates. We investigate how much the new rates
influence the evolution of low-mass, metal-poor and metal-free stars
and of an intermediate-mass star of solar-type
composition. We concentrate on phases of helium ignition or thermally
unstable helium burning. Our global result is that the new
rate has no significant influence on such stars, but that there is a
noticeable though small effect of the new
rate, in
particular on the core helium flash and the blue loop during core
helium burning in the intermediate-mass star.
Key words: stars: interiors / stars: evolution / nuclear reactions, nucleosynthesis, abundances
© ESO, 2005
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