EXOSAT observations of M dwarf stars in the solar neighborhood

Details EXOSAT observations of M dwarf stars in the solar neighborhood EXOSAT observations of M dwarf stars in the solar neighborhood

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...191...99s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 191, no. 1, Feb. 1988, p. 99-108.

Astronomy and Astrophysics

Astronomy

21

Dwarf Stars, Exosat Satellite, M Stars, Solar Neighborhood, Stellar Coronas, X Ray Astronomy, Algorithms, Heao 2, Poisson Density Functions, Spaceborne Telescopes, Spectrum Analysis

Scientific paper

The authors present EXOSAT observations of a sample of nearby (d < 6 pc) M dwarf stars most of which have not previously been observed in X-rays. All the target stars were detected except one (Gl 754, spectral type M7). The X-ray luminosities derived are in the typical range of M dwarf X-ray luminosities derived from Einstein Observatory data, and the authors find further evidence for a drop in X-ray luminosity towards late spectral types. The EXOSAT filter ratios indicate the presence of gas at temperatures in excess of 107K, again confirming the Einstein Observatory results. The observations provide no evidence for any time variability in the form of flares or trends.

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