@conference {28450,
	title = {DD Mon and XY UMa: CCD Photometry and Modeling of Two Close Binary Systems with Solar-Type Components},
	volume = {435},
	year = {2010},
	month = {2010/12/1},
	pages = {351},
	abstract = {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.},
	keywords = {Astrophysics - Solar and Stellar Astrophysics},
	isbn = {1050-3390},
	url = {https://ui.adsabs.harvard.edu/abs/2010ASPC..435..351G},
	author = {Gazeas, K. and Liakos, A. and Niarchos, P.}
}
