Continuing mass transfer in U Cephei - Observations and analysis outside primary eclipse

Details Continuing mass transfer in U Cephei - Observations and analysis outside primary eclipse Continuing mass transfer in U Cephei - Observations and analysis outside primary eclipse

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220..251o&link_type=abstract

Astrophysical Journal, Part 1, vol. 220, Feb. 15, 1978, p. 251-260.

Astronomy and Astrophysics

Astrophysics

29

Astronomical Photometry, Eclipsing Binary Stars, Light Curve, Mass Transfer, B Stars, Stellar Envelopes, Stellar Spectra

Scientific paper

Large rapid changes in the light curves of U Cep outside eclipse were observed during transient states of high mass transfer. The most prominent feature was a broad deep dip which appeared near orbital phase 0.6 and removed up to 46% of the ultraviolet light of the B star. Circumstellar-cloud and cool-spot models are explored as possible explanations; the latter is shown to be in substantial agreement with observations. Spots can evidently appear or disappear on a time scale of about one week, in response to an increase or decrease of the contemporary rate of mass transfer.

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