Analysis of Brightness Variations in the Massive Close Binary System UU Cassiopeia

Details Analysis of Brightness Variations in the Massive Close Binary System UU Cassiopeia Analysis of Brightness Variations in the Massive Close Binary System UU Cassiopeia

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002arep...46..900p&link_type=abstract

Astronomy Reports, Vol. 46, Issue 12, pp. 900-907

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We derive the parameters of the hot, massive close binary system UU Cas from earlier and recent photoelectric UBVR observations: M 1 = 34.5M &sun;, M 2 = 25.7M &sun;, A = 69R &sun;, and i=68°; the components' limb darkening coefficients are close to 1. Our fitting of the light curves provides evidence for a high degree of over-contact: the components fill their inner critical surfaces by 132% and 100%. It is possible that the appearance of the light curve is determined not only by the distorted shapes of the components and their eclipses but, to a considerable extent, by screening by a complex envelope and the envelope's contribution to the system's total luminosity.

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