Investigation of the new cataclysmic variable 1RXS J180834.7+101041

TL;DR

This study investigates a newly discovered eclipsing cataclysmic variable star, analyzing its spectral and photometric data to determine system parameters and disk structure, suggesting the presence of tidal density waves.

Contribution

It provides the first detailed spectral and photometric analysis of 1RXS J180834.7+101041, including component masses, inclination, and disk modeling with spots, highlighting potential tidal density waves.

Findings

Component masses: M_WD = 0.8 ± 0.22 M_sun, M_RD = 0.14 ± 0.02 M_sun

Binary inclination: 78 ± 1.5 degrees

Disk with two spots explains light curve features

Abstract

We present the results of our photometric and spectroscopic studies of the new eclipsing cataclysmic variable star 1RXS J180834.7+101041. Its spectrum exhibits double-peaked hydrogen and helium emission lines. The Doppler maps constructed from hydrogen lines show a nonuniform distribution of emission in the disk similar to that observed in IP Peg. This suggests that the object can be a cataclysmic variable with tidal density waves in the disk. We have determined the component masses (M_WD =0.8 \pm 0.22 M_sun and M_RD =0.14 \pm 0.02 M_sun) and the binary inclination (i =78 \pm 1.5 deg) based on well-known relations between parameters for cataclysmic variable stars. We have modeled the binary light curves and showed that the model of a disk with two spots is capable of explaining the main observed features of the light curves.