Proper Motions Beyond the Milky Way

Proper motions (PMs) from Gaia and HST have revolutionized the field of Galactic archaeology in the Milky Way (MW). However, PM studies in the Outer Halo and beyond the MW are still in their early stages with reliable measurements only being available for a small number of objects. In this presentation, I will review the status of PM measurements currently available for stellar systems beyond the MW, and describe ongoing efforts to increase their quantities and qualities. Preliminary results from some of the HSTPROMO's projects including PM measurements of Crater-Leo Group as well as the satllites galaxies of M31 will be presented. I will also discuss prospects using future data obtained with observatories like the JWST. 

Keywords: astrometry, solar neighbourhood, stellar content, Gaia, parallax, luminosity function, catalogue completeness, pre-main-sequence stars, binaries, interferometers, astrometry, ICRF3, VLBI, stars: statistics, stars:distances, stars:fundamental parameters, Galaxy: disk, Galaxy: stellar content, masers—stars: individual (BX Cam)—stars:evolved, astrometry, kinematics, radio inter- ferometer, Astrometry, Proper Motions, Local Group