Solar calibration of asteroseismology

Physics

Scientific paper

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Periodic Variations, Seismology, Stellar Cores, Stellar Physics, Acoustic Velocity, Asymptotic Methods, Helioseismology, Stellar Evolution, Stellar Models

Scientific paper

The first expected result of asteroseismology will consist in the measurement of two parameters, Δν and D0. The first depends mostly on the mass and evolves slowly with age, while the second is strongly age dependent through the increase of molecular mass in the stellar core. Theorists have started to build Δν - D0 diagrammes, as a tool for the determination of mass and age of stars. The authors have made a precise measurement of those parameters in the case of the sun. D0 appears to be consistent, within the here published error bar of 2%, with the frequency tables of the most recent standard models. This is an extremely severe constraint to be satisfied by every eventual non-standard model.

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