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Radial distribution of stellar motions inGaiaDR2

Kawata, D, Baba, J, Ciucă, I, Cropper, M, Grand, RJJ, Hunt, JAS and Seabroke, G (2018) Radial distribution of stellar motions inGaiaDR2. Monthly Notices of the Royal Astronomical Society: Letters, 479 (1). L108-L112. ISSN 1745-3925

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By taking advantage of the superb measurements of position and velocity for an unprecedented large number of stars provided inGaiaDR2, we have generated the first maps of the rotation velocity,Vrot, and vertical velocity,Vz, distributions as a function of the Galactocentric radius, Rgal, across a radial range of 5 < Rgal < 12 kpc. In theR-Vrot map, we have identified many diagonal ridge features, which are compared with the location of the spiral arms and the expected outer Lindblad resonance of the Galactic bar. We have detected also radial wave-like oscillations of the peak of the vertical velocity distribution.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical and Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press (OUP)
SWORD Depositor: A Symplectic
Date Deposited: 19 Apr 2023 11:31
Last Modified: 19 Apr 2023 11:31
DOI or ID number: 10.1093/mnrasl/sly107
URI: https://researchonline.ljmu.ac.uk/id/eprint/19334
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