Physics
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...82..457i&link_type=abstract
(International Astronomical Union and Akademiia Nauk SSSR, Colloquium on Problems of Solar and Stellar Oscillations, 66th, Nauch
Physics
2
Solar Oscillations, Stellar Evolution, Stellar Models, Stellar Oscillations, Astronomical Models, Asymptotic Giant Branch Stars, Giant Stars, Globular Clusters, Helium, Horizontal Branch Stars, Late Stars, Solar Interior, Solar Neutrinos, Stellar Envelopes, Stellar Mass Ejection
Scientific paper
The present investigation has the objective to show how observations of stellar oscillations may be used to help solve problems in stellar evolution. Observations are discussed concerning attempts to deduce information about the solar interior from a comparison between the mode structure of solar models and observed solar oscillatory characteristics. Attention is given to the dependence of several solar model characteristics on composition choice, stars in galactic globular clusters which are burning helium in their cores while on the horizontal branch, classical Cepheids, and stars in the asymptotic giant branch (AGB) phase of evolution. With the help of the observational and theoretical properties of RR Lyrae stars, the existence of a mass loss process is established, and it is shown that the abundance of helium in the oldest stars is substantially greater than zero.
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