Investigations of a new eclipsing cataclysmic variable HBHA 4705-03

TL;DR

This study presents photometric and spectroscopic analysis of the eclipsing cataclysmic variable star HBHA 4705-03, revealing its spectral features, component masses, orbital inclination, and accretion rate.

Contribution

It provides the first detailed measurements of the system's component masses, orbital parameters, and accretion characteristics using combined observational data.

Findings

Component masses: M_WD = 0.54 ± 0.10 M_sun, M_RD = 0.45 ± 0.05 M_sun

Orbital inclination: 71.8 ± 0.7 degrees

Mass accretion rate: approximately 2×10^{17} g/s

Abstract

Results of photometric and spectroscopic investigations of the recently discovered eclipsing cataclysmic variable star HBHA 4705-03 are presented. The emission spectra of the system show broad hydrogen and helium emission lines. The bright spots with an approximately zero velocity components are found in the Doppler maps for the hydrogen and ionized helium lines. The disc structure is more prominent in the maps for the neutral helium lines. The masses of the components (M_WD = 0.54 \pm 0.10 M_sun and M_RD = 0.45 \pm 0.05 M_sun), and the orbit inclination (i = 71.8 \pm 0.^7 deg) were estimated using the radial velocity light curve and the eclipse width. The modeling of the light curve allows us to evaluate the bright spot parameters and the mass accretion rate (\dot M \approx 2 10^{17} g s^{-1}).