A new analysis of the infrared eclipses of the ultra-short period dwarf nova OY Carinae.

October 1987 • 1987MNRAS.228..729B

Authors • Berriman, Graham

Abstract • 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.


IPAC Authors


Bruce Berriman

Senior Scientist