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

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

2006-07-05

arxiv.org/abs/astro-ph/0607071v1

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1086/507345

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.

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