Multiple Stellar Systems with Eclipsing Binaries
Résumé
To undertake dynamical studies on stellar triple systems and to test stellar models for subsolar mass stars, a photometric and spectroscopic observational campaign of newly discovered HIPPARCOS eclipsing binaries has been realized since 1997 through a collaborative international effort. Starting with a sample of 50 candidate objects, we retained at the end 36 systems, from which 24 are new doubled-lined eclipsing binaries. We found seven objects to be new spectroscopic triple systems and confirmed the presence of the spectroscopically visible third body in three other systems. Two triple systems, CU Cam and CN Lyn present evident long-period variations of the third body radial velocity as well as changes of the center-of-mass velocity of eclipsing system. We present and discuss the results of the photometric and spectrosvopic data for these two triple systems.