Ultraviolet spectrophotometry of degenerate stars.
Abstract
Observations of one helium- and three hydrogen-atmosphere degenerates made with the International Ultraviolet Explorer are discussed. Fluxes in the UV give temperatures in good accordance with those determined from the ground and from the ANS satellite data. Profiles of the strong L-alpha absorption in two DA's fit predictions for the expected temperatures. Gravity determination is vitiated by their steep temperature dependence. If one accepts that theoretical predictions should be correct, corrections to the absolute IUE calibration derived are an upward shift of 3-5%, with irregular residuals attaining + or - 7%.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1979
- DOI:
- 10.1086/182948
- Bibcode:
- 1979ApJ...229L.141G
- Keywords:
-
- Line Spectra;
- Stellar Temperature;
- Ultraviolet Spectrophotometers;
- White Dwarf Stars;
- Astronomical Netherlands Satellite;
- Helium;
- International Sun Earth Explorers;
- Stellar Atmospheres;
- Astrophysics;
- Degenerate Stars:UV Spectrophotometry;
- Lyman Alpha:White Dwarfs