The M-dwarf contribution to the diffuse soft X-ray background revisited

Details The M-dwarf contribution to the diffuse soft X-ray background revisited The M-dwarf contribution to the diffuse soft X-ray background revisited

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..989c&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, Sept. 1990, p. 989-993.

Astronomy and Astrophysics

Astronomy

6

Dwarf Stars, M Stars, X Ray Spectra, Astronomical Photometry, Background Radiation, Diffuse Radiation, Stellar Luminosity

Scientific paper

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.

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