Volume 414, Number 2, February I 2004
|Page(s)||L17 - L20|
|Published online||19 January 2004|
Letter to the Editor
Theoretical instability strips for δ Scuti and γ Doradus stars
Instituto de Astrofísica de Andalucía-CSIC, Apartado 3004, 18080 Granada, Spain
2 Institut d'Astrophysique et de Géophysique de l'Université de Liè ge, Belgium
Accepted: 11 December 2003
New theoretical instability strips for δ Sct and γ Dor stars are presented. These results have been obtained taking into account the perturbation of the convective flux following the treatment of Gabriel ([CITE]). For the first time, the red edge of the δ Sct instability strip for non-radial modes is obtained. The influence of this time-dependent convection (TDC) on the driving of the γ Dor gravity modes is investigated. The results obtained for different values of the mixing-length parameter α are compared for the γ Dor models. A good agreement with observations is found for models with α between 1.8 and 2.0.
Key words: stars: oscillations / stars: interiors / stars: variables: general
© ESO, 2004
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