1RXS J180834.7+101041 is a new cataclysmic variable with non-uniform disc

TL;DR

This paper reports the discovery and detailed analysis of a new cataclysmic variable star, 1RXS J180834.7+101041, revealing non-uniform disc emission and a spiral density wave, with estimated stellar masses and orbital inclination.

Contribution

It provides the first detailed spectroscopic and photometric characterization of 1RXS J180834.7+101041, identifying non-uniform disc emissivity and spiral density waves in a newly discovered system.

Findings

Non-uniform emission distribution in the disc similar to IP Peg

Detection of a spiral density wave in the disc

Estimated stellar masses and orbital inclination

Abstract

Results of photometric and spectroscopic investigations of the recently discovered disc cataclysmic variable star 1RXS J180834.7+101041 are presented. Emission spectra of the system show broad double peaked hydrogen and helium emission lines. Doppler maps for the hydrogen lines demonstrate strongly non-uniform emissivity distribution in the disc, similar to that found in IP Peg. It means that the system is a new cataclysmic variable with a spiral density wave in the disc. Masses of the components (M_WD = 0.8 +/- 0.22 M_sun and M_RD = 0.14 +/- 0.02 M_sun), and the orbit inclination (i = 78 +/- 1.5 deg) were estimated using the various well-known relations for cataclysmic variables.