On the eclipsing cataclysmic variable star HBHA 4705-03

Дата и время публикации : 2013-06-19T09:11:51Z

Авторы публикации и институты :
A. Rutkowski (Astronomical Observatory, Jagiellonian University, Krakow, Poland)
T. Ak (Istanbul University, Faculty of Sciences, Department of Astronomy and Space Sciences, Turkey)
T. R. Marsh (University of Warwick, Department of Physics, Coventry, UK)
Z. Eker (Akdeniz University, Faculty of Science, Department of Astronomy and Space Technologies Antalya, Turkey)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 7 figures and 2 tables, accepted for publication in Acta Astronomica
Первичная категория: astro-ph.SR

Все категории : astro-ph.SR

Краткий обзор статьи: 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 M_1 = (0.8 +- 0.2) M_sun, secondary mass M_2=(0.497 +- 0.05) M_sun, orbital radius a=1.418 R_sun, orbital inclination i = (81.58 +- 0.5) deg, accretion disk radius r_d/a = 0.366 +- 0.002, and accretion rate dot{M} = (2.5 +- 2) * 10^{18}[g/s], (3*10^{-8} [M_sun/yr]). Power spectrum analysis revealed ambiguous low-period Quasi Periodic Oscillations centered at the frequencies f_{1}=0.00076 Hz, f_2=0.00048 Hz and f_3=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.

Category: Physics