ROSAT Detections of X-Ray Emission from Young B-Type Stars
Abstract
We present first results of a series of pointings of the Rosat HRI at visual binaries consisting of a B-star with a later-type companion. The binaries selected for this study are very likely physical pairs. Dating of the B-type stars with respect to the zero-age main sequence, as well as spectroscopic observations of the late-type stars, provides evidence for the extreme youth of these systems with ages typically near or below 10 exp 8 yr. Surprisingly, the late-B component was in many cases detected as an X-ray source, in contrast to previous findings that X-ray emission among late-B field stars is rather uncommon.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- January 1993
- DOI:
- 10.1086/186688
- Bibcode:
- 1993ApJ...402L..13S
- Keywords:
-
- B Stars;
- Emission Spectra;
- Rosat Mission;
- X Ray Spectra;
- Globular Clusters;
- Spaceborne Astronomy;
- Stellar Coronas;
- Stellar Magnetic Fields;
- Astrophysics;
- STARS: CORONAE;
- X-RAYS: STARS