A radial velocity study of CTCV J1300-3052

作者：Savoury C D J^*; Littlefair S P; Marsh T R; Dhillon V S; Parsons S G; Copperwheat C M; Steeghs D

来源：Monthly Notices of the Royal Astronomical Society, 2012, 422(1): 469-477.

DOI：10.1111/j.1365-2966.2012.20625.x

• binaries: close
• binaries: eclipsing
• stars: dwarf novae
• stars: evolution
• stars: low mass
• novae, cataclysmic variables

We present time-resolved spectroscopy of the eclipsing, short-period cataclysmic variable CTCV J1300-3052. Using absorption features from the secondary star, we determine the radial velocity semi-amplitude of the secondary star to be K-2 = 378 +/- 6 km s(-1), and its projected rotational velocity to be upsilon sin i = 125 +/- 7 km s(-1). Using these parameters and Monte Carlo techniques, we obtain masses of M-1 = 0.79 +/- 0.05 M-circle dot for the white dwarf primary and M-2 = 0.198 +/- 0.029 M-circle dot for the M-type secondary star. These parameters are found to be in good agreement with previous mass determinations found via photometric fitting techniques, supporting the accuracy and validity of photometric mass determinations in short-period CVs.

• 出版日期2012-5