Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...285..531z&link_type=abstract
Astronomy and Astrophysics 285, 531-534 (1994)
Astronomy and Astrophysics
Astrophysics
8
Accretion, Accretion Disk, Binaries: Eclipsing, Stars: Uu Cnc
Scientific paper
Available photometric data of UU Cnc were reanalyzed in order to check for the presence of an accretion disk in the system. Light curve modeling made with a code that simulates a light curve of a binary containing an accretion disk was performed. Results show that such a model describes the observed B and V light curves very well. The system was found to consist of a more massive star completely hidden by an optically thick accretion disk and of a 0.77Msun_ K4 III giant with radius of about 37Rsun_. The system mass ratio was derived to be about 0.56 and inclination close to 90 degrees. The disk seen edge-on contributes to the observed light curves very little. Its main effect in the light curve is due to its eclipse of the giant star observed as the deeper minimum. Such a model could explain some cases of the β -Lyr paradox - invisibility in the spectrum of the more massive star due to its obscuration by an optically thick accretion disk, in systems with inclination close to 90 degrees.
Hall David S.
Henry Gregory W.
Zola St.
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