EDP Sciences
Free Access
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

A&A 441, 1129-1133 (2005)
DOI: 10.1051/0004-6361:20053084

Influence of two updated nuclear reaction rates on the evolution of low and intermediate mass stars

A. Weiss1, A. Serenelli2, 1, A. Kitsikis1, H. Schlattl1 and J. Christensen-Dalsgaard3

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 $^{14}{\rm N}(p,\gamma)^{15}{\rm0}$ and $3\,\alpha$ 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 $3\,\alpha$ rate has no significant influence on such stars, but that there is a noticeable though small effect of the new $^{14}{\rm N}(p,\gamma)^{15}{\rm0}$ 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

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.