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Period Variations and Possible Third Components in the Eclipsing Binaries AH Tauri and ZZ Cassiopeiae
D. E. Tvardovskyi, V. I. Marsakova, I. L. Andronov +1
We investigated two variable stars AH Tau and ZZ Cas. They are eclipsing binaries of W UMa and Lyr types. The period changes with time. The reason for steady changes of the per…
Effects of the Mass Transfer and Presence of the Third Components in Close Binary Stellar Systems
Dmytro E. Tvardovskyi, Vladyslava I. Marsakova, Ivan L. Andronov
In our research, we have studied 6 close binary stellar systems which are eclipsing variables of Lyrae and W Ursae Majoris types of variability. We have studied their O-C curve…
Instabilities in Interacting Binary Stars
Ivan L. Andronov, K. D. Andrych, K. A. Antoniuk +43
The types of instability in the interacting binary stars are reviewed. The project "Inter-Longitude Astronomy" is a series of smaller projects on concrete stars or groups of stars.…