Theoretical instability strips for δ Scuti and γ Doradus stars

Details Theoretical instability strips for δ Scuti and γ Doradus stars Theoretical instability strips for δ Scuti and γ Doradus stars

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...414l..17d&link_type=abstract

Astronomy and Astrophysics, v.414, p.L17-L20 (2004)

Astronomy and Astrophysics

Astrophysics

61

Stars: Oscillations, Stars: Interiors, Stars: Variables: General

Scientific paper

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{Gabriel1996}). 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.

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