Three SU UMa Type Dwarf Novae in the Period Gap and Its Vicinity: CRTS J000130+050624, 1RXS J003828.7+250920 and V452 Cas

Abstract

The results of photometric observations of three SU UMa type cataclysmic variables in the quiescent state (\(18\overset{\textrm{m}}{.}3-20\overset{\textrm{m}}{.}5\)) are presented. It is shown that the objects have different ouburst amplitudes: \(5^{\textrm{ m}}\)—CRTS J000130+050624; \(3\overset{\textrm{m}}{.}7\)—1RXS J003828.7+250920 and \(2\overset{\textrm{m}}{.}5\)—V452 Cas. The orbital period was first discovered for CRTS J000130+050624—0.09055(19) days, V452 Cas—0.084898(2) days, and updated for 1RXS J003828.7+250920—0.09451123(5) days. Ephemeris have been determined for the light curve minima of these objects associated with the orbital period. Estimates of the mass ratio of the components are \(q=0.181(6)\), \(0.198(1)\), \(0.183(2)\) for 1RXS J003828.7+250920, CRTS J000130+050624, and V452 Cas, respectively. It is shown that these dwarf novae are located in the vicinity of the theoretical short-period boundary of the period gap and are in good agreement with known empirical data.