ROSAT X-Ray All-Sky Survey Observations of Hybrid Stars
Abstract
Data from the Rosat All-Sky Survey for nine hybrid stars, objects showing spectroscopic evidence for cool massive winds and 500,000-K material, are presented. Two of the nine stars were detected above a limiting flux threshold of 2 x 10 exp -13 ergs/sq cm s. The K3 III star Delta And was detected just at this threshold. The K4 III star Alpha TrA was measured at 8 x 10 exp -13 ergs/sq cm s. Since these detections were made in both low- and high-energy bands of the Rosat 0.1-2.4-keV passband, it is suggested that the emissions originate in coronae of about 10 exp 7 K.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1992
- DOI:
- 10.1086/186330
- Bibcode:
- 1992ApJ...388L..61H
- Keywords:
-
- Rosat Mission;
- Sky Surveys (Astronomy);
- Stellar Coronas;
- Stellar Spectrophotometry;
- X Ray Stars;
- Astronomical Catalogs;
- Iue;
- Magnetohydrodynamic Waves;
- Astrophysics;
- STARS: CORONAE;
- X-RAYS: STARS