Аннотация:Binarity is often invoked to explain peculiarities that can
not be explained by the standard theory of stellar evolution. Detecting
orbital motion via the Doppler effect is the best method to test binarity
when direct imaging is not possible. However, when the orbital period
exceeds a length of a typical observing run, monitoring often becomes
problematic. Placing a high-throughput spectrograph on a small semi robotic
telescope allowed us to carry out a radial velocity survey of
various types of peculiar evolved stars. In this review, we highlight
some findings after the first four years of observations. Thus, we detect
eccentric binaries among hot subdwarfs, barium, S stars, and postAGB
stars with disks, which are not predicted by the standard binary
interaction theory. In disk objects, in addition, we find signs of the ongoing
mass transfer to the companion, and an intriguing line splitting,
which we attribute to the scattered light of the primary.