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We have explored a sample of suspected A-type binaries in a systematic way,both spectroscopically and photometrically. Due to their location in the H-Rdiagram, indications of pulsation and/or chemical peculiarities among thesesuspected binary (or multiple) systems may be found. High-resolutionspectroscopy obtained with the ELODIE and MUSICOS spectrographs was used incombination with a few nights of differential CCD photometry in order to searchfor pulsation(s). Of the 32 investigated targets, eight are spectroscopicbinaries, one of which is a close binary also showing eclipses, and three havebeen identified as Delta Scuti pulsators with rapid line-profile variations.Among the latter stars, HD 217860 reveals interesting multiperiodic photometricand spectroscopic variations, with up to eight frequencies common to two largephotometric data sets. We suggest that at least one radial overtone mode isexcited among the two most dominant frequencies. We furthermore found evidencefor a strong modulation of the amplitude(s) and/or the (radial) frequencycontent of this intriguing Delta Scuti star.

Search for pulsation among suspected A-type binaries and the new multiperiodic Delta Scuti star HD217860