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DD Mon and XY UMa: CCD Photometry and modelling of two close binary systems with solar-type components

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arxiv 0910.2911 v1 pith:4UPBYGXM submitted 2009-10-15 astro-ph.SR

DD Mon and XY UMa: CCD Photometry and modelling of two close binary systems with solar-type components

classification astro-ph.SR
keywords systemslightbinariesbinaryclosephotometricactiveanalysis
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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