Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.103..285l&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 103, no. 2, Aug. 1984, p. 285-292.
Astronomy and Astrophysics
Astrophysics
7
Astronomical Photometry, Eclipsing Binary Stars, Variable Stars, A Stars, Electrophotometry, Light Curve, Ubv Spectra
Scientific paper
The W UMa system V758 Centauri has been observed photoelectrically in the UBV system at Bosque Alegre Station, and the comparison and check stars at Cerro Tololo Observatory. Full light curves were constructed from 1043 differential UBV observations. A study of 11 photoelectric times of minimum light and of earlier photographic data shows that the period remained constant in the last century; V758 Cen shows a total occultation at secondary minimum, thus being an A-type W UMa system. Asymmetries are observed at primary minima whereas maxima are of different heights. Thermal decoupling of the components is suggested by the depth ratio of the minima; V758 Cen may be at the broken phase (or marginal contact) of a thermal relaxation oscillation.
Lipari Sebastian L.
Sistero Roberto F.
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