view Abstract Citations (42) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The changing light curves of CG Cygni. Milone, E. F. ; Castle, K. G. ; Robb, R. M. ; Swadron, D. ; Burke, E. W. ; Hall, D. S. ; Michlovic, J. E. ; Zissell, R. E. Abstract UBV photoelectric light curves of the eclipsing close binary CG Cyg, obtained in the period from 1965 through 1977, are reduced and analyzed. Positive evidence is found for: (1) an increase in mean light by about 14% in V since 1965; (2) a sinusoidal distortion wave sweeping through the light curve, currently at an increasing rate; and (3) another change in period, probably continuous, since the late 1960s. It is shown that the distortion has a significantly variable amplitude and (with marginal significance) is greater for shorter wavelengths, on the average. It is concluded that these results, combined with a large apparent IR excess and variation in the Ca II H and K lines, may indicate a major episode in the evolution of CG Cyg. Publication: The Astronomical Journal Pub Date: March 1979 DOI: 10.1086/112436 Bibcode: 1979AJ.....84..417M Keywords: Cygnus Constellation; Eclipsing Binary Stars; Electrophotometry; Light Curve; Stellar Spectrophotometry; Fourier Analysis; Ubv Spectra; Astronomy; Eclipsing Binaries:Light Curves; Eclipsing Binaries:Period Changes full text sources ADS | data products SIMBAD (1)