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Modelling the Milky Way with Gaia-TGAS

Published online by Cambridge University Press:  07 March 2018

Jason A. S. Hunt Open the ORCID record for Jason A. S. Hunt [Opens in a new window]
Jason A. S. Hunt*
Affiliation:
Dunlap Institute for Astronomy & Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada
*
†[email protected]
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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.

Keywords

Galaxy: kinematics and dynamicsGalaxy: fundamental parameters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 222 - 224
Copyright
Copyright © International Astronomical Union 2018 

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