Photoelectric light curves and elements of VW Cephei

Details Photoelectric light curves and elements of VW Cephei Photoelectric light curves and elements of VW Cephei

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26as...58..261n&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 58, Nov. 1984, p. 261-271.

Astronomy and Astrophysics

Astrophysics

3

Cepheid Variables, Eclipsing Binary Stars, Light Curve, Electrophotometry, Stellar Mass Ejection, Tables (Data)

Scientific paper

The W UMa-type eclipsing binary VW Cephei was observed photoelectrically in two wavelengths during 1979-1980, and the results are presented. The light curves of the system are analyzed using frequency domain techniques, and new geometric and photometric elements are given. The light curves are asymmetrical in both the maxima and the minima; the heights of the two maxima are unequal and the minima are of unequal depths. Shoulders are observed in both wavelength observations. Analysis of the results shows that the period of the system is still decreasing. This fact implies a mass stream from primary to secondary of the order of 2 x 10 to the -7th solar masses/yr. The primary star fills its Roche lobe, while the secondary does not. This implies a 'semidetached' status for the system.

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