Reference : Time-dependent convection study of the driving mechanism in the DBV white dwarfs
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
Time-dependent convection study of the driving mechanism in the DBV white dwarfs
Dupret, Marc-Antoine [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique >]
Quirion, P. O. [Institut for Fysic og Astronomi, Aarhus, Denmark]
Fontaine, G. [Université de Montréal, Québec, Canada]
Brassard, P. [Université de Montréal, Québec, Canada]
Grigahcène, A. [CRAAG - Algiers Observatory BP 63 Bouzareah 16340, Algiers, Algeria]
Journal of Physics: Conference Series
[en] We apply for the first time time-dependent convection (TDC) models to the study of the driving mechanism of the Pulsating DB (V777 Herculis) white dwarfs. From the blue to the red edge of the instability strip of these stars, TDC appears to play a central role in the driving. Around the blue edge, the convection adapts quasi-instantaneously to the oscillations, so that TDC must be included in the models. For the first time, we show that the red edge of the DB instability strip is successfully obtained with a TDC treatment, especially thanks to the terms due to the turbulent pressure variations, while it is not reproduced with frozen convection models.

File(s) associated to this reference

Fulltext file(s):

Open access
dupret2-1742-6596_118_1_012051.pdfNo commentaryPublisher postprint586.74 kBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.