Analyses of the lambda-6575 and lambda-4870 light curves of 32 Cygni

Details Analyses of the lambda-6575 and lambda-4870 light curves of 32 Cygni Analyses of the lambda-6575 and lambda-4870 light curves of 32 Cygni

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pasp...91..343g&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 91, June-July 1979, p. 343-347.

Astronomy and Astrophysics

Astronomy

8

Eclipsing Binary Stars, Light Curve, Stellar Spectrophotometry, Supergiant Stars, Astrometry, Phase Deviation, Radii, Statistical Analysis, Stellar Motions

Scientific paper

Intermediate-band λ6575 and λ4870 photoelectric observations of the 1147-day eclipsing binary, 32 Cyg, have been obtained on 71 nights. The observations were made over an interval of 1807 days representing nearly 1.6 orbital cycles and including the 1971 and 1974 primary eclipses. Significant outside eclipse light variations were uncovered that apparently arise from the tidally distorted K supergiant component. Analyses of the light curves indicate a radius of ∼310 Rsun for the K star which is larger than that previously accepted. The hotter component appears to be a B8 V star with a radius of about 3.5 Rsun. Values of i = 73°.5, e = 0.28, and ωK = 185° were also derived from the photometric data.

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