Paper published in a book (Scientific congresses and symposiums)
Non-adiabatic seismic study of the thin convective envelope of delta Scuti stars
Dupret, Marc-Antoine; Grigahcène, A.; Garrido, R. et al.
2004In IAU Colloq. 193: Variable Stars in the Local Group
 

Files


Full Text
310-0470.pdf
Publisher postprint (420.45 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] For delta Sct stars, the theoretical predictions of a non-adiabatic pulsation code are very dependent on the characteristics of the thin convective envelope of the models (Balona and Evers 1999). The treatment of the non-adiabatic interaction between convection and pulsation also has a significant impact on the results, particularly near the red edge of the instability strip. The non-adiabatic theoretical predictions can be tested upon observations by comparing them to the amplitude ratios and phase differences as observed in different color passbands (Dupret et al. 2003). In the first part of this paper, we compare the results obtained by adopting different treatments of convection in the interior and atmosphere models: mixing-length theory (MLT) and full spectrum of turbulence (FST) (Canuto et al. 1996, CGM). In the second part, we examine the problem of the interaction between convection and pulsation and compare the mode stability obtained with and without including time-dependent convection in our non-adiabatic code.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Dupret, Marc-Antoine ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique
Grigahcène, A.
Garrido, R.
Montalban Iglesias, Josefa ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Gabriel, Maurice ;  Département d'astrophys., géophysique et océanographie (AGO)
Scuflaire, Richard ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Evol. et stabilité des étoiles et des amas d'étoiles (ESEA)
Language :
English
Title :
Non-adiabatic seismic study of the thin convective envelope of delta Scuti stars
Publication date :
01 May 2004
Audience :
International
Main work title :
IAU Colloq. 193: Variable Stars in the Local Group
Pages :
470
Commentary :
310
Available on ORBi :
since 10 November 2010

Statistics


Number of views
47 (1 by ULiège)
Number of downloads
35 (0 by ULiège)

Bibliography


Similar publications



Contact ORBi