We present our ground-based CCD observations of the close binary systems DD Mon and XY UMa in B, V, R and I bands. The light curves are analyzed using the Wilson-Devinney code (W-D) for the derivation of the geometric and photometric elements of the systems. We compare the methods of photometric and spectroscopic mass ratio determination in these binaries, as a function of all typical difficulties, which arise during the analysis of such systems (light curve asymmetries, third light etc). Finally, a new spot model is suggested for the eclipsing system XY UMa, which belongs to the RS CVn type of active binaries.
@article{arxiv.0910.2911,
title = {DD Mon and XY UMa: CCD Photometry and modelling of two close binary systems with solar-type components},
author = {K. Gazeas and A. Liakos and P. Niarchos},
journal= {arXiv preprint arXiv:0910.2911},
year = {2009}
}
Comments
3 pages, 2 figures, contribution to the conference proceedings: Binaries - Key to Comprehension of the Universe, Brno, Czech Republic, 8-12 Jun. 2009