Optical observations of the ultrahigh-excitation Wolf-Rayet star Sanduleak 3.
Abstract
Recombination lines of O VII, O VIII, and C V have been identified in the optical spectrum of an O VI Wolf-Rayet star, representing the first non-X-ray detection of these ions in astronomical spectra and implying excitation energies in excess of 800 eV. Rapid variations on a time scale of about 150 s have been observed in the profile of one of the O VII lines.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1980
- DOI:
- 10.1086/183353
- Bibcode:
- 1980ApJ...241L..27B
- Keywords:
-
- Hot Stars;
- Ion Recombination;
- Line Spectra;
- Oxygen;
- Stellar Spectra;
- Wolf-Rayet Stars;
- Carbon;
- Emission Spectra;
- Ionization Potentials;
- Planetary Nebulae;
- Astrophysics;
- Line Identifications:Wolf-Rayet Stars;
- Spectra:Wolf-Rayet Stars