A radial velocity study of CTCV J1300-3052

C. D J Savoury, Stuart P Littlefair, Thomas R. Marsh, Vik S Dhillon, S. G. Parsons, C. M. Copperwheat, D. Steeghs

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Abstract

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 ± 6kms -1, and its projected rotational velocity to be vsini= 125 ± 7kms -1. Using these parameters and Monte Carlo techniques, we obtain masses of M 1= 0.79 ± 0.05 M for the white dwarf primary and M 2= 0.198 ± 0.029 M 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.

Original languageEnglish
Pages (from-to)469-477
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume422
Issue number1
DOIs
Publication statusPublished - May 2012
Externally publishedYes

Keywords

  • Binaries: close
  • Binaries: eclipsing
  • Novae, cataclysmic variables
  • Stars: dwarf novae
  • Stars: evolution
  • Stars: low mass

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