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Session 123 -- Intrinsic Variables and Active Stars

Oral presentation, Saturday, January 15, 2:15-3:45, Salon V Room (Crystal Gateway)

[123.06] Photoelectric Observations of Long-Period RS CVn Binary \\ CQ Aurigae

Long-period RS CVn-type binary CQ Aur was observed in 1987 and 1988. B and V light curves for the 1987 and 1988 epochs have been analyzed for the photometric solution by the modified Wilson and Devinney computing code with adjustable spot parameters. One-spot fit is good enough for the 1987 epoch while a wider distribution of spots in longitude is required for the 1988 epoch. The spot covers approximately 3\% of total surface area of the cooler component. Absolute dimensions were deduced by combining Poper's spectroscopic results. The volume of the cooler component is approximately 100 times larger than that of the hotter component. Both components are subgiants but the cooler component evolved more than the hotter component.

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