Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..130..245v&link_type=abstract
Astronomy and Astrophysics Supplement, v.130, p.245-250
Astronomy and Astrophysics
Astrophysics
7
Binaries: Eclipsing:, Stars: Individual: Ty Cra, Stars: Pre-Main Sequence
Scientific paper
Complete uvby light curves of the detached Herbig Be eclipsing binary TY Coronae Australis are presented. A total of 1789 photometric measurements in each of the four colours were obtained in 1989 and in 1992-1994. A detailed analysis of the y light curve obtained in 1992-1993 is published separately \cite[(Casey et al. 1997)]{cas97}. The reflection nebula around the system contributes about 30% of the light in all four passbands. Here we present and discuss the non-eclipse-related photometric variability of the system. We suggest that these variations are the result of variable obscuration, possibly linked to dust shells physically associated to the system. Based on observations collected with the Danish 50~cm Strömgren Automatic Telescope, SAT, at the European Southern Observatory (ESO), La Silla, Chile.
Andersen Jeppe J.
Casey Brian W.
Clausen Jens Viggo
Heyer Inge
Mathieu Robert D.
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