The nature of the IR variability of CI Cygni

Details The nature of the IR variability of CI Cygni The nature of the IR variability of CI Cygni

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pazh...13..423t&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 13, May 1987, p. 423-426. In Russian. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

2

Eclipsing Binary Stars, Infrared Stars, Symbiotic Stars, Variable Stars, Amplitudes, Cygnus Constellation, Ellipticity, Light Curve, Mass Ratios

Scientific paper

The nature of infrared variability of the eclipsing symbiotic star CI Cyg is considered. From the analysis of observations of 1978 - 1986, it follows that the observed variability of CI Cyg in the range 1.25 - 2.2 μm is explained by a joint effect connected with the ellipticity of the cool component in the system CI Cyg and its intrinsic variability with the period of 37d.2. From the amplitude of variations of the J brightness, due to ellipticity of the cool component, the mass ratio in the system CI Cyg is estimated: Mh/Mc ≡ 0.045.

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