Photoelectric observations of long-period RS CVn binary CQ Aurigae

Details Photoelectric observations of long-period RS CVn binary CQ Aurigae Photoelectric observations of long-period RS CVn binary CQ Aurigae

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.201...35k&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 201, no. 1, p. 35-45.

Astronomy and Astrophysics

Astrophysics

4

Binary Stars, Electrophotometry, Light Curve, Main Sequence Stars, Stellar Spectrophotometry, Stellar Magnitude, Stellar Spectra

Scientific paper

The 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 a photometric solution by a modified Wilson and Devinney computing code with adjustable spot parameters. A 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 percent of the total surface area of the cooler component. Absolute dimensions were deduced by combining Popper'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 has evolved more than the hotter component.

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