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

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

2009-10-15

arxiv.org/abs/0910.2911v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

3 pages, 2 figures, contribution to the conference proceedings: Binaries - Key to Comprehension of the Universe, Brno, Czech R

Scientific paper

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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