NEAR-SURFACE EFFECTS IN MODELLING OSCILLATIONS OF ETA BOO

Details NEAR-SURFACE EFFECTS IN MODELLING OSCILLATIONS OF ETA BOO NEAR-SURFACE EFFECTS IN MODELLING OSCILLATIONS OF ETA BOO

1995-03-29

arxiv.org/abs/astro-ph/9503106v1

Astronomy and Astrophysics

Astrophysics

uuencoded and compressed Postscript (2 pages, including figure); To appear in Proceedings of IAU Colloquium 155, "Astrophysica

Scientific paper

Following the report of solar-like oscillations in the G0 V star eta Boo (Kjeldsen et al. 1995, AJ 109, 1313), a first attempt to model the observed frequencies was made by Christensen-Dalsgaard et al. (1995, ApJ Letters, in press). This attempt succeeded in reproducing the observed frequency separations, although there remained a difference of about 10 microHz between observed and computed frequencies. In those models, the near-surface region of the star was treated rather crudely. Here we consider more sophisticated models that include non-local mixing-length theory, turbulent pressure and nonadiabatic oscillations.

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