Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.161..221i&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 161, no. 2, Nov. 1989, p. 221-231.
Astronomy and Astrophysics
Astrophysics
9
Astronomical Photometry, Eclipsing Binary Stars, Hot Stars, Taurus Constellation, White Dwarf Stars, Companion Stars, Light Curve, Physical Properties, Stellar Evolution
Scientific paper
The white-dwarf red-dwarf eclipsing binary V471 Tauri has been observed photoelectrically, in blue and yellow lights, from 1985 to 1989. The behavior of the mean brightness variation has been re-examined. The mean brightness has decreased from 1982 to 1985 and thereafter it started to increase again. The amount of the variation of the light of the system has reached to 0.19 mag in both colors since 1973. On the other hand, the new timings of mid-eclipse deviate considerably from those linear and light-time effect fittings. Neither the third-body hypothesis, nor any other mechanism can explain the orbital period change of the system.
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