Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985afz....22...87p&link_type=abstract
(Astrofizika, vol. 22, Jan.-Feb. 1985, p. 87-96) Astrophysics (ISSN 0571-7132), vol. 21, no. 1, July 1985, p. 51-58. Translation
Astronomy and Astrophysics
Astronomy
Flare Stars, H Alpha Line, Orion Nebula, Star Distribution, Stellar Activity, Variable Stars, Emission Spectra, Stellar Flares, Stellar Luminosity, Stellar Magnitude, Stellar Spectra, Ultraviolet Astronomy
Scientific paper
The percentage of flare stars among RW variables with variability range of at least 1 magnitude is shown to be about 40 percent and among the variables with at least 2-magnitude ranges about 60 percent. It follows that the higher the RW activity, the higher the percentage of flare stars among them. It is shown that the mean frequency of flares of stars with RW activity does not differ appreciably from the frequency of the flares of the remaining flare stars. Among flare stars, about 10 percent exhibit RW activity. The shapes of the distribution of the flare stars and H-alpha stars with respect to the magnitude are identical. The luminosity function of the H-alpha stars is an increasing function to photographic magnitude 18.
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