Reference : Non-adiabatic seismic study of the thin convective envelope of delta Scuti stars

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/75471

Title :	Non-adiabatic seismic study of the thin convective envelope of delta Scuti stars
Language :	English
Author, co-author :	Dupret, Marc-Antoine [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique >]
	Grigahcène, A. [> > > >]
	Garrido, R. [> > > >]
	Montalban Iglesias, Josefa [Université de Liège - ULg > 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 - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Evol. et stabilité des étoiles et des amas d'étoiles (ESEA) >]
Publication date :	1-May-2004
Main document title :	IAU Colloq. 193: Variable Stars in the Local Group
Pages :	470
On invitation :	No
Audience :	International
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.
Permalink :	http://hdl.handle.net/2268/75471
Other URL :	http://adsabs.harvard.edu/abs/2004ASPC..310..470D
Commentary :	310

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