Time-dependent convection seismic study of five γ Doradus stars |
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| Authors: | M-A Dupret A Grigahcène R Garrido J De Ridder R Scuflaire M Gabriel |
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| Institution: | Instituto de Astrofísica de Andalucía-CSIC, Apartado 3004, 18080 Granada, Spain;Observatoire de Paris, LESIA, 92195 Meudon, France;CRAAG –Algiers Observatory BP 63 Bouzareah 16340, Algiers, Algeria;Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, 3001 Leuven, Belgium;Institut d'Astrophysique et de Géophysique de l'Universitéde Liège, Liège, Belgium |
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| Abstract: | We apply for the first time the time-dependent convection (TDC) treatment of Gabriel and Grigahcène et al. to the photometric mode identification in γ Doradus (γ Dor) stars. We consider the influence of this treatment on the theoretical amplitude ratios and phase differences. Comparison with the observed amplitudes and phases of the stars γ Dor, 9 Aurigae, HD 207223 = HR 8330, HD 12901 and 48501 is presented and enables us to identify the degree ? of the pulsation modes for four of them. We also determine the mode stability for different models of these stars. We show that our TDC models agree better with observations than with frozen convection models. Finally, we compare the results obtained with different values of the mixing-length parameter α. |
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| Keywords: | convection stars: interiors stars: oscillations stars: variables: other |
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