* Astronomy

Title: Orbital Period of the Dwarf Nova RXS J053234.9+624755
Authors: Ann B. Kapusta, John R. Thorstensen

5 Jul 2006

Researchers 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. They also report UBVI magnitudes of the quiescent dwarf nova and surrounding stars. Using a previous measurement of the superhump period, they 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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