Orbital Period of the Dwarf Nova RXS J053234.9+624755

Abstract

We report spectroscopy of the newly discovered SU Ursae Majoris dwarf nova identified with the x-ray source RXS J053234.9+624755. Radial velocities of the H-alpha emission line in the quiescent state give an orbital period of 0.05620(4) d (80.93 min), which is among the shortest for SU UMa stars with determined periods. We also report UBVI magnitudes of the quiescent dwarf nova and surrounding stars. Using a previous measurement of the superhump period, we find the fractional superhump excess epsilon to be 0.016(4), which is not atypical of dwarf novae in this period range.

arXiv comment14 pages; 4 figs, 1 png and 3 eps. Accepted by Publications of the Astronomical Society of the Pacific

References in corpus (1)

• Superhumps in Cataclysmic Binaries. XXIV. Twenty More Dwarf Novae

Cited by in corpus (4)

• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IX: The Ninth Year (2016-2017)
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. X: The Tenth Year (2017)
• Dwarf Novae in the Shortest Orbital Period Regime: I. A New Short Period Dwarf Nova, OT J055717+683226