Eclipsing Binaries Showing Light Time Effect
Petr Zasche

TL;DR
This paper investigates four eclipsing binary systems exhibiting period changes, analyzing the potential presence of third bodies through light time effect, radial velocity, and light curve data, and calculating their properties.
Contribution
It introduces new light elements and mass functions for these binaries, providing evidence for possible third bodies affecting their periods.
Findings
Calculated new light elements for the systems
Derived mass functions and minimum masses of third bodies
Discussed likelihood of third bodies based on multiple observational data
Abstract
Four eclipsing binaries, which show apparent changes of period, have been studied with respect to a possible presence of the light time effect. With a least squares method we calculated new light elements of these systems, the mass function of the predicted third body, and its minimum mass. We discuss the probability of the presence of such bodies in terms of mass function, changes in radial velocity and third light in solution of light curves.
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