Pedagogical University of Cracow, Poland
One of the channels to produce sdB stars requires companions to these stars. This channel easily explain the hydrogen envelope lose and a detection of more sdBs in binaries makes this channel to be very important in evolution of sdB stars. During my talk, I will review our recent progress in finding more sdB stars in binaries or harboring planets. In addition, I will present our newest discoveries of pulsation properties of sdB stars.
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