Main . Using high-precision astrometric data from the Gaia satellite14, we establish a large and homogeneous sample of 125 co-moving pairs of stars with a well defined and unbiased selection function for high-precision spectroscopic analysis18, with the aim to examine potential planet signatures. Of these, 91 pairs of stars with spatial separations Δ s ?<?10 6 ?AU can be regarded as close and co-natal with a shared origin15 , 16; the other 34 are regarded as highl...