After January 15, registrations will only be accepted for virtual participation. Registration deadline extended to January 15 (midnight, CET). Registration open until December 31, 2022.Workshop fee: 300 Euro (in-person) or 100 Euro (online).Program: a mix of talks, discussions, and poster sessions.Mode: primarily in-person, plus a limited number of online attendance slots will be made available.Location: Potsdam Telegrafenberg, Germany.Near field cosmology: galaxy dynamics, dark matter content, cosmological models. Galaxy formation: histories of the Milky Way, of Andromeda, compared to field galaxies.Andromeda System: rotation curve, halo dwarfs.Dwarf irregular galaxies: dynamics, ram pressure effects.Magellanic System: the Clouds, the Stream and the Leading Arm.Galactic halo dwarf spheroidal and ultra-faint dwarfs.The Galaxy mass and size: rotation curve, halo stars, globular clusters.Distances, Chemistry & Star formation in the Local Group: large surveys of resolved stars.Astrometry and 3D velocities: Gaia and HST.Measuring galaxy masses at different scales in the Local Group impacts a broad range of astronomy, from stars, star clusters, to the Milky Way, distant galaxies, and Cosmology. However, it addresses a very broad range of astronomical fields (from studies of variable stars for estimating distances to dynamical modeling), of wave-lengths to be investigated (from radio and optical for estimating the HI gas and stellar content and their motions, to X-rays for estimating the warm and hot ionized gas), and has major implications for a fundamental question (from the distribution and nature of dark matter to alternative models). This IAU Symposium has a very focused goal: Determining the mass of galaxies from dwarfs to giant spirals. This is driven by Gaia and numerous accompanying surveys that provide an accurate Milky Way rotation curve, detailed orbits of the nearby dwarf galaxies, and first estimates of the motions of dwarf irregulars and in the M31 system. Yet, this topic is undergoing a revolution due to increasing knowledge of 6D space-velocity data for galaxies in the Local Group. Amongst the most stringent limitations in astronomy and cosmology are the very large uncertainties on galaxy masses and sizes.
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