The M Dwarf Contribution to the Diffuse Soft X-Ray Background Revisited
Abstract
The M-dwarf contribution to the soft X-ray background has been redetermined using new optical photometry for a previous sample of M dwarfs and additional Einstein X-ray survey data. The result, which is obtained from a sample area more than double the size of that previously used, is a conservative upper limit: M dwarfs contribute less than 10 percent to the soft XRB. This limit is consistent with that obtained in a similar X-ray-selected sample analysis by Caillault et al. (1986) and is more than a factor of two less than the estimate obtained by Rosner et al. (1981) from an optically selected sample of stars.
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- September 1990
- DOI:
- 10.1086/132728
- Bibcode:
- 1990PASP..102..989C
- Keywords:
-
- Dwarf Stars;
- M Stars;
- X Ray Spectra;
- Astronomical Photometry;
- Background Radiation;
- Diffuse Radiation;
- Stellar Luminosity;
- Astrophysics;
- STARS: RED DWARFS;
- COSMIC BACKGROUND RADIATION