2018MNRAS.479L.108K

Query : 2018MNRAS.479L.108K

2018MNRAS.479L.108K - Mon. Not. R. Astron. Soc., 479, L108-L112 (2018/September-1)

Radial distribution of stellar motions in Gaia DR2.

KAWATA D., BABA J., CIUCA I., CROPPER M., GRAND R.J.J., HUNT J.A.S. and SEABROKE G.

Abstract (from CDS):

By taking advantage of the superb measurements of position and velocity for an unprecedented large number of stars provided in Gaia DR2, 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 the R - 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.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Galaxy: disc - Galaxy: evolution - Galaxy: kinematics and dynamics

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
2 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
3 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
4 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
5 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
6 NAME Sgr Arm PoG 19 00 -30.0           ~ 710 1
7 NAME Sirius Moving Group MGr ~ ~           ~ 125 0
8 NAME Scutum Spiral Arm PoG ~ ~           ~ 393 0
9 NAME Galactic Bar reg ~ ~           ~ 1458 0
10 NAME Hercules Stream MGr ~ ~           ~ 264 0
11 NAME Local Arm reg ~ ~           ~ 649 0
12 NAME Pleiades Moving Group MGr ~ ~           ~ 297 0

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