Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..729b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Oct. 1, 1987, p. 729-743. SERC-supported research.
Astronomy and Astrophysics
Astronomy
8
Dwarf Novae, Eclipses, Infrared Astronomy, Accretion Disks, Brightness Temperature, Data Simulation, Light Curve, Red Dwarf Stars, Stellar Temperature, White Dwarf Stars
Scientific paper
The morphology of the infrared light curve of OY Car is investigated in order to study the eclipsed components: the disk, the white dwarf, and the bright spot. A low infrared brightness temperature of 10,000-15,000 K at J (1.25 microns) is deduced, although a brightness temperature as hot as about 25,000 K, closer to previous estimates, is possible for an inclination close to 83.3 deg and a red dwarf mass of about 0.08 solar masses. A brightness temperature for the bright spot of not greater than 7000 K at J is found providing that it radiates as a sphere of radius 2.5 x 10 to the 9th cm. It is suggested that the brightening of the system out of eclipse and the deep secondary minimum noted on January 26, 1981 may be due to either the inner side of the bright spot being heated or to the variability of the disk distorting the light curve shapes.
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