Reference : Convection-pulsation coupling. I. A mixing-length perturbative theory
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/75395
Convection-pulsation coupling. I. A mixing-length perturbative theory
English
Grigahcène, A. [Instituto de Astrofísica de Andalucía-CSIC, Apartado 3004, 18080 Granada, Spain]
Dupret, Marc-Antoine [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique >]
Gabriel, Maurice [> > Département d'astrophys., géophysique et océanographie (AGO) >]
Garrido, R. [Instituto de Astrofísica de Andalucía-CSIC, Apartado 3004, 18080 Granada, Spain]
Scuflaire, Richard [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Evol. et stabilité des étoiles et des amas d'étoiles (ESEA) >]
1-May-2005
Astronomy and Astrophysics
EDP Sciences
434
1055-1062
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] stars: oscillations ; convection ; stars: interiors
[en] We present in details a time-dependent convection treatment in the frame of the Mixing-Length Theory (MLT). Following the original ideas by Unno (1967, PASJ, 19, 140), this theory has been developed by Gabriel et al. (1974, Bull. Ac. Roy. Belgique, Classe des Sciences, 60, 866) and Gabriel (1996, Bull. Astron. Soc. India, 24, 233). In this paper, we present it in a united form, we detail the basic derivations and approximations and give final improvements. A new perturbation of the energy closure equation is proposed for the first time, making it possible to avoid the occurrence of short wavelength spatial oscillations of the thermal eigenfunctions. This theory accounts for the perturbation of the convective flux, the turbulent Reynolds stress and the turbulent kinetic energy dissipation. It has been numerically implemented in a non-radial non-adiabatic pulsation code and the first results published in a Letter by Dupret et al. (2004a, A&A, 414, L17) indicate that the theory predicts the observed red border of the lower end of the instability strip and the driving mechanism of the recently discovered gamma Dor stars.
http://hdl.handle.net/2268/75395
10.1051/0004-6361:20041816
http://adsabs.harvard.edu/abs/2005A%26A...434.1055G

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
Grig-convth-aa2005.pdfPublisher postprint370.37 kBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.