Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mmsai..51..713s&link_type=abstract
(Società Astronomica Italiana, Convegno sulla Variabilita Stellare, 1st, Massalubrense, Italy, May 22-24, 1980.) Società Astrono
Astronomy and Astrophysics
Astronomy
Spaceborne Astronomy, Stellar Radiation, Variable Stars, X Ray Sources, B Stars, Flare Stars, H Ii Regions, Late Stars, Main Sequence Stars, Molecular Clouds, O Stars, T Tauri Stars, Wolf-Rayet Stars
Scientific paper
Planned observations and preliminary results of recent observations of the X-ray emission from variable stars made by the Einstein Observatory are reviewed. The cataclysmic variables detected in the X-ray by Einstein, which has a sensitivity three orders of magnitude greater than previous instruments, are indicated, together with detections of Orion and other pre-main sequence stars within nebulae, including T Tauri stars. Observations of high X-ray luminosities from OB stars, Wolf-Rayet stars and searches for X-ray emission in the regions of molecular clouds, H II regions and COS-B gamma ray sources are considered, and X-ray emission detected from late-type main sequence stars is then discussed, with particular attention given to RS CVn-type and dwarf M and UV Ceti/flare stars. Conclusions that may be derived from the observations concerning the prevalence of X-ray emission from stars of practically all spectral types and luminosity classes are summarized.
Serio G.
Vaiana Giuseppe S.
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