Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-08-17
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
4 pages, 2 figures, 1 table. To appear in the ASP proceedings of "The 61st Fujihara seminar: Progress in solar/stellar physics
Scientific paper
We perform an asteroseismological study on the DAV star G117-B15A on the basis of a modern set of fully evolutionary DA white dwarf models that have consistent chemical profiles at the core and the envelope. We found an asteroseismological model for G117-B15A that closely reproduces its observed pulsation periods. Then, we use the most recently measured value of the rate of period change for the dominant mode of this pulsating star to impose a preliminary upper limit to the mass of the axion.
Althaus Leandro G.
Corsico Alejandro Hugo
Garcia-Berro Enrique
Isern Jordi
Miller Bertolami Marcelo M.
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