U Cephei and its outbursts in 1969 and 1974

Details U Cephei and its outbursts in 1969 and 1974 U Cephei and its outbursts in 1969 and 1974

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jrasc..71..234b&link_type=abstract

Journal of the Royal Astronomical Society of Canada, vol. 71, June 1977, p. 234-239.

Astronomy and Astrophysics

Astronomy

4

Eclipsing Binary Stars, Emission Spectra, Stellar Spectra, Light Curve, Orbital Elements, Secular Variations, Stellar Luminosity

Scientific paper

The distribution of the residuals from photoelectrically determined epochs of minima has been studied during two recent outbursts of U Cephei. It has been shown that during the second outburst, in 1974, a long-term change of the period of the system occurred. Furthermore, it appears that deformations of the descending branch of the light curves, caused by the presence of gas streams, produce fictitious changes of the orbital period.

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