Coronal X-rays from Single, Magnetic White Dwarfs: A Search and Probable Detection
Abstract
We have searched for X-ray emission from a sample of five nearby (6-2 pc), strongly magnetic (10-200 MG), relatively cool (6000-14000 K), single white dwarfs, two of which may possess coronae. We detect one star (GR 290) at better than 99% confidence and give upper limits from Einstein Observatory IPC data for 4 others. The detected flux and limits are in the range of 1.4 - 12.5 X 10^27 erg s^-1. (SECTION: Stars)
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- April 1992
- DOI:
- Bibcode:
- 1992PASP..104..239A
- Keywords:
-
- Cool Stars;
- Magnetic Stars;
- Stellar Coronas;
- Stellar Radiation;
- White Dwarf Stars;
- X Ray Sources;
- Bremsstrahlung;
- Heao 2;
- Stellar Envelopes;
- Stellar Luminosity;
- Astrophysics;
- WHITE DWARFS;
- STARS: CORONAE;
- RADIATION MECHANISMS: BREMSSTRAHLUNG