H-alpha line profiles in DA white dwarfs.
Abstract
Rotational velocities have been determined for several white dwarfs from the sharp NLTE core of the Hα profile. A new synthetic profile has been computed for Teff = 16,000K, log g = 8.0 white dwarfs; this profile fits closely the observed spectra of white dwarfs of this temperature. The authors confirm that Wolf 485A rotates with a velocity v sin i = 42±9 km s-1. Rotational velocities in 40 Eri B, SA 29-130, and L970-30 are less than 20 km s-1.
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- July 1985
- DOI:
- 10.1086/131577
- Bibcode:
- 1985PASP...97..634M
- Keywords:
-
- H Alpha Line;
- Line Spectra;
- Stellar Atmospheres;
- Stellar Rotation;
- White Dwarf Stars;
- Cool Stars;
- Astrophysics