Exo-Jupiters and Saturns from two Gaia-like missions
arXiv:1408.4341
Abstract
Detection and orbit determination for thousands of planets with periods up to about 40 years would be obtained by astrometry from two Gaia-like missions, results which cannot be obtained by any other mission, planned or proposed. A billion stars of all spectral types will be surveyed. A comprehensive knowledge about heavy planets with these periods, reaching well beyond the snow line of any system, will lead to a better understanding of the formation and evolution of planets, also in the habitable zone.
12 pages, 5 figures. Contribution to the study of a Gaia successsor in "Absolute astrometry in the next 50 years" at http://arxiv.org/abs/1408.2190