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Ronald Drimmel

INAF – Ossrvatorio Astrofisico di Torino

Abstract

Thanks to the most recent data release from ESA’s Gaia satellite, the astronomical community now has at its finger tips the parallaxes and proper motions of over a billion stars. While this represents only a tiny fraction of the total number of stars in our galaxy, it samples a significant fraction of the volumn of the Milky Way. Gaia is not only a galactic cartographers dream machine: thanks to its proper motions it is setting the Galaxy in motionfor us. For the first time we are able to map in detail the stellar kinematics not only in the solar neighborhood, but also in other neighboring volumns to significant distances.

I present some of the most recent surprises that this data set has revealed regarding the dynamics of the Milky Way, some remaining open questions, and how Gaia is allowing us to see our home galaxy in a new light and is forcing us to rethink our usual assumptions.

Area Tor Vergata – IAPS Via Fosso Del Cavaliere, 100

CONSIGLIO NAZIONALE DELLE RICERCHE - Area della Ricerca di Roma 2 - Tor Vergata Via del Fosso del Cavaliere, 100 - 00133 Roma