BD-22°3467, a DAO-type star exciting the nebula Abell 35
Abstract
Context. Spectral analyses of hot, compact stars with non-local thermodynamical equilibrium (NLTE) model-atmosphere techniques allow the precise determination of photospheric parameters such as the effective temperature (Teff), the surface gravity (log g), and the chemical composition. The derived photospheric metal abundances are crucial constraints for stellar evolutionary theory.
Aims: Previous spectral analyses of the exciting star of the nebula
Methods: For the analysis of high-resolution and high signal-to-noise ratio (S/N) far-ultraviolet (FUSE) and UV (HST/STIS) observations, we combined stellar-atmosphere models and interstellar line-absorption models to fully reproduce the entire observed UV spectrum.
Results: The best agreement with the UV observation of
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 2012
- DOI:
- 10.1051/0004-6361/201219536
- arXiv:
- arXiv:1210.7614
- Bibcode:
- 2012A&A...548A.109Z
- Keywords:
-
- stars: abundances;
- stars: atmospheres;
- stars: evolution;
- stars: individual: BD-22 3467;
- white dwarfs;
- planetary nebulae: individual: A66 35;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 13 pages, 17 figures