[PDF] Precise mass and radius values for the white dwarf and low mass M dwarf in the pre‐cataclysmic binary NN Serpentis | Semantic Scholar
@article{Parsons2009PreciseMA,
title={Precise mass and radius values for the white dwarf and low mass M dwarf in the pre‐cataclysmic binary NN Serpentis},
author={S G Parsons and Thomas R. Marsh and Christopher M. Copperwheat and Vik S. Dhillon and Stuart P. Littlefair and Boris T. G{\"a}nsicke and R. D. G. Hickman},
journal={Monthly Notices of the Royal Astronomical Society},
year={2009},
volume={402},
pages={2591-2608},
url={https://api.semanticscholar.org/CorpusID:15186725}
}Using the high resolution Ultraviolet and Visual Echelle Spectrograph (UVES) mounted on the Very Large Telescope in combination with photometry from the high-speed CCD camera ULTRACAM, we derive precise system parameters for the pre-cataclysmic binary NN Ser. A model fit to the ULTRACAM light curves gives the orbital inclination as i = 89 degrees.6 +/- 0 degrees.2 and the scaled radii, R-WD/a and R-sec/a. Analysis of the He (II) 4686 angstrom absorption line gives a radial velocity amplitude…