Disc system Delta Capricorni

Abstract

First UBV photoelectric photometry of the eclipsing binary system δ Cap has been presented. An improved period of 1.ᵈ022766 has been given. The duration of primary eclipsing comes out to be more than double the duration given earlier. The depth has also been found to have increased. The light changes during eclipsing show slight asymmetry. Eccentricity appears to be present in the system. Light and colour curves show variations. Primary component appears to be surrounded by a disc, the size of which is comparable to the size of the primary component. Two dips are seen around phase 0.20 and 0.67, the first appears more definitive, and is attributed to the wave-like distortion, like the one found in RS CVn binaries. The discussion reveals that δ Cap is a very complicated system.