On the eclipsing cataclysmic variable star HBHA 4705-03
Abstract
We present observations and analysis of a new eclipsing binary HBHA 4705-03. Using decomposition of the light curve into accretion disk and hot spot components, we estimated photometrically the mass ratio of the studied system to be q=0.62 +-0.07. Other fundamental parameters was found with modeling. This approach gave: white dwarf mass M1 = (0.8 +- 0.2) Msun, secondary mass M2=(0.497 +- 0.05) Msun, orbital radius a=1.418 Rsun, orbital inclination i = (81.58 +- 0.5) deg, accretion disk radius rd/a = 0.366 +- 0.002, and accretion rate dotM = (2.5 +- 2) * 1018[g/s], (3*10-8 [Msun/yr]). Power spectrum analysis revealed ambiguous low-period Quasi Periodic Oscillations centered at the frequencies f1=0.00076 Hz, f2=0.00048 Hz and f3=0.00036 Hz. The B-V=0.04 [mag] color corresponds to a dwarf novae during an outburst. The examined light curves suggest that HBHA 4705-03 is a nova-like variable star.