Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990acaps..10...48x&link_type=abstract
Acta Astrophys. Sin., Vol. 10, No. 1, p. 48 - 55
Astronomy and Astrophysics
Astrophysics
Algol Systems: Light Curves, Algol Systems: Photometry, Algol Systems: Stellar Models
Scientific paper
CI Aur is a short-period Algol type eclipsing binary with a period of 1.870052 days. Photoelectric observations in the UBV system were made between November 1984 and January 1985. The UBV light curves show some random flickering and short-time variations. The photometric solutions were analyzed by the Wilson-Devinney method. CI Aur is a semidetached system, with the less massive component (secondary star) filling its Roche lobe. The mass ratio is 0.687 and its orbital inclination is 74°42. Autoregressive power spectral analysis and harmonic analysis for the light curves of CI Aur were made. The results demonstrate that the oscillations are multiple quasi-periodic and have low amplitudes. The gas stream from the secondary star of CI Aur strikes the trailing hemisphere of the primary star. The disk, produced by the star-stream interaction, is unstable. The authors discuss two models of CI Aur.
Leung Ka Chun
Li Zhi-An
Tan Hui-Song
Xu Liue-Fu
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