On the sdOB primary of the post common-envelope binary AA Doradus (LB 3459 )
Abstract
Context.
Aims: We aim to determine both the effective temperature and surface gravity of
Methods: We calculated an extended grid of metal-line blanketed, state-of-the-art, non-LTE model atmospheres in the parameter range of the primary of
Results: We verify from our former analyses and determine a higher log g = 5.46 ± 0.05. The main reason are new Stark-broadening tables that were used for calculating of the theoretical Balmer-line profiles.
Conclusions: Our result for the surface gravity agrees with the value from light-curve analysis within the error limits, thereby solving the so-called gravity problem in
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 2011
- DOI:
- 10.1051/0004-6361/201116887
- arXiv:
- arXiv:1106.1964
- Bibcode:
- 2011A&A...531L...7K
- Keywords:
-
- stars: abundances;
- stars: atmospheres;
- binaries: eclipsing;
- stars: early-type;
- stars: individual: AA Dor (LB 3459);
- stars: fundamental parameters;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 6 pages, 7 figures