An unusual variable star - CH CYG

Details An unusual variable star - CH CYG An unusual variable star - CH CYG

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980afz....16..443l&link_type=abstract

(Astrofizika, vol. 16, July-Sept. 1980, p. 443-455.) Astrophysics, vol. 16, no. 3, Jan. 1981, p. 262-270. Translation.

Astronomy and Astrophysics

Astrophysics

15

Binary Stars, Stellar Radiation, Stellar Spectrophotometry, Variable Stars, Giant Stars, Light Curve, Stellar Magnitude, Stellar Mass Accretion, Stellar Models, White Dwarf Stars

Scientific paper

Basic observational data on CH Cyg are presented and an empirical model explaining the data is developed. The star CH Cyg is a binary comprising a semiregular M6 III giant and a white dwarf, around which a transient accretion disk is formed during sufficiently high maxima of the semiregular star. The prediction is made that soft X-rays should be observed when there is an excess ultraviolet radiation and that hard X rays should be observed when there are strong fluctuations of the ultraviolet radiation. It is noted that as a binary system CH Cyg can be resolved by the methods of speckle interferometry.

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