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This paper provides orbital parameters for 38 barium stars and 10 extrinsic Sstars derived from a decade-long CORAVEL monitoring. Lower bounds on theorbital period (generally exceeding 10 y) have been obtained for 10 moresystems. Mira S, SC and (Tc-poor) C stars have also been monitored and showintrinsic radial-velocity variations due to atmospheric phenomena. Tentativeorbital solutions are proposed for 3 stars (S UMa, X Cnc, BD-08:1900) where thevelocity and photometric periods are different. Three stars (RZ Peg, SS Vir andR CMi) exhibit radial-velocity variations synchronous with the lightvariations. Pseudo-orbital solutions have been derived for those stars. In thecase of RZ Peg, a line-doubling phenomenon is observed near maximum light, andprobably reflects the shock wave propagating through the photosphere.

A CORAVEL radial-velocity monitoring of giant Ba and S stars: Spectroscopic orbits and intrinsic variations. I.