English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We present our ground-based CCD observations of the close binary systems DDMon and XY UMa in B, V, R and I bands. The light curves are analyzed using theWilson-Devinney code (W-D) for the derivation of the geometric and photometricelements of the systems. We compare the methods of photometric andspectroscopic mass ratio determination in these binaries, as a function of alltypical difficulties, which arise during the analysis of such systems (lightcurve asymmetries, third light etc). Finally, a new spot model is suggested forthe eclipsing system XY UMa, which belongs to the RS CVn type of activebinaries.

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