Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-27
Astronomy and Astrophysics
Astrophysics
24 pages, 6 tables and 11 figures. Accepted for publication in Astronomy and Astrophysics
Scientific paper
An adiabatic, nonradial pulsation study of GW Vir stars is presented. The pulsation calculations are based on PG1159 evolutionary sequences with different stellar massess artificially derived from a full evolutionary sequence of 0.5895 Mo that has been computed taking into account the evolutionary history of the progenitor star. The artificial sequences were constructed by appropriately scaling the stellar mass of the 0.5895 Mo sequence well before the models reach the low-luminosity, high-gravity stage of the GW Vir domain. We compute g-mode pulsation periods appropriate to GW Vir variable stars. The implications for the mode-trapping properties of our PG 1159 models are discussed at length. We found that the mode-trapping features characterizing our PG 1159 models are mostly fixed by the stepped shape of the core chemical profile left by prior convective overshooting. This is particularly true at least for the range of periods observed in GW Vir stars. In addition, we make asteroseismic inferences about the internal structure of the GW Vir stars PG 1159-035, PG 2131+066, PG 1707+427 and PG 0122+200.
Althaus Leandro G.
Corsico Alejandro Hugo
No associations
LandOfFree
Asteroseismic inferences on GW Vir variable stars in the frame of new PG 1159 evolutionary models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Asteroseismic inferences on GW Vir variable stars in the frame of new PG 1159 evolutionary models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asteroseismic inferences on GW Vir variable stars in the frame of new PG 1159 evolutionary models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-413052