A statistical analysis of the light curve of AF Cygni

Details A statistical analysis of the light curve of AF Cygni A statistical analysis of the light curve of AF Cygni

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983azh....60...91k&link_type=abstract

(Astronomicheskii Zhurnal, vol. 60, Jan.-Feb. 1983, p. 91-94) Soviet Astronomy (ISSN 0038-5301), vol. 27, Jan.-Feb. 1983, p. 54-

Astronomy and Astrophysics

Astronomy

Cygnus Constellation, Light Curve, Stellar Spectrophotometry, Variable Stars, Brightness, Power Spectra, Random Noise, Statistical Analysis, Stochastic Processes

Scientific paper

The light curve of the variable star AF Cyg is analyzed statistically. The calculations show that the variability is a stochastic process. Brightness oscillations with mean periods of 93, 176, and 941 days are present and constitute narrow-band random noise. The peaks in the power spectrum corresponding to these cycles exceed the 99 percent confidence level. The oscillations are independent. Evidently some mechanism causes the 93 day and 176 day cycles to predominate alternately.

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