Ultraviolet stellar spectra obtained on Skylab.
Abstract
A 15-cm aperture f/3 Ritchey-Chretien telescope equipped with a 4 deg calcium fluoride prism was employed in taking objective prism spectra from 1300 to 5000 A in 188 stars, in the three Skylab missions. Spectra of 2 A resolution at 1400 A and 10 A at 2000 A, extending to B0 stars such that V equals 6.5, were taken of 400 stars in the neighborhood of 1500 A. Stellar temperature and luminosity variations are revealed in resonance lines of C IV and Si IV. Profiles of P Cygni type show up in the spectra of all stars with absolute bolometric magnitudes brighter than minus 8.4, implying appreciable outflow of mass. Spectra with emission lines shortward of 2000 A were obtained for 12 WR stars, and spectra of some companion stars dominating the UV spectra are reported.
- Publication:
-
Space research XVI
- Pub Date:
- 1976
- Bibcode:
- 1976spre.conf..923H
- Keywords:
-
- Skylab Program;
- Spaceborne Telescopes;
- Stellar Luminosity;
- Stellar Spectra;
- Stellar Temperature;
- Ultraviolet Spectra;
- Emission Spectra;
- Spectrum Analysis;
- Stellar Spectrophotometry;
- Astronomy