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Modelling the Milky Way with Gaia-TGAS

Published online by Cambridge University Press:  07 March 2018

Jason A. S. Hunt*
Affiliation:
Dunlap Institute for Astronomy & Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada
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Abstract

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I summarize two recent projects involving the Gaia-TGAS data. Firstly, I discuss a detection of a lack of disc stars in the Solar neighbourhood with velocities close to zero angular momentum. We use predictions of this effect to make a measurement of the Solar rotation velocity around the Galactic centre, and also of R0. Secondly, I discuss a detection of a group of stars with systematically high Galactic rotation velocity. We propose that it may be caused by the Perseus arm and compare the data with simulations.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2018 

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