V471 Tauri, ballerina of the Hyades

Details V471 Tauri, ballerina of the Hyades V471 Tauri, ballerina of the Hyades

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96..976s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Sept. 1988, p. 976-987.

Astronomy and Astrophysics

Astronomy

39

Eclipsing Binary Stars, Late Stars, Star Clusters, Stellar Spectrophotometry, White Dwarf Stars, K Stars, Light Curve, Line Spectra, Stellar Rotation, Stellar Winds, Ultraviolet Radiation, Visible Spectrum

Scientific paper

Orbital light curves for V471 Tauri, the red dwarf-white dwarf binary in the Hyades, were obtained for the 1980-1983 observing seasons based on photometric and spectroscopic data. The results reveal the effects of tidal distortion of the secondary and a slow, transient wave which may originate from darker areas on the star's surface. A consistent ephemeris is derived. A Ca II line emission similar to that of rapidly rotating late-type stars and an additional component arising from the stellar region bathed in the white dwarf's UV-radiation field are found. An overall orbital-period decrease is noted which may be due to the strong braking of the K star's rotation by its own stellar wind, coupled with the enforcement of synchronous rotation by the tidal interaction with the white dwarf.

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