Radial distribution of stellar motions inGaiaDR2

Daisuke Kawata; Junichi Baba; Ioana Ciucă; Mark Cropper; Robert J.J. Grand; Jason A.S. Hunt; George Seabroke

doi:10.1093/mnrasl/sly107

Radial distribution of stellar motions inGaiaDR2

Daisuke Kawata^*, Junichi Baba, Ioana Ciucă, Mark Cropper, Robert J.J. Grand, Jason A.S. Hunt, George Seabroke

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

90 Citations (Scopus)

Abstract

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,V_rot, and vertical velocity,V_z, distributions as a function of the Galactocentric radius, R_gal, across a radial range of 5 < Rgal < 12 kpc. In theR-V_rot 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.

Original language	English
Pages (from-to)	L108-L112
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	479
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/sly107
Publication status	Published - 1 Sept 2018
Externally published	Yes

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title = "Radial distribution of stellar motions inGaiaDR2",

abstract = "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.",

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author = "Daisuke Kawata and Junichi Baba and Ioana Ciuc{\u a} and Mark Cropper and Grand, {Robert J.J.} and Hunt, {Jason A.S.} and George Seabroke",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s).",

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doi = "10.1093/mnrasl/sly107",

language = "English",

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T1 - Radial distribution of stellar motions inGaiaDR2

AU - Kawata, Daisuke

AU - Baba, Junichi

AU - Ciucă, Ioana

AU - Cropper, Mark

AU - Grand, Robert J.J.

AU - Hunt, Jason A.S.

AU - Seabroke, George

PY - 2018/9/1

Y1 - 2018/9/1

N2 - 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.

AB - 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.

KW - Galaxy: disc

KW - Galaxy: evolution

KW - Galaxy: kinematics and dynamics

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DO - 10.1093/mnrasl/sly107

M3 - Article

SN - 1745-3925

VL - 479

SP - L108-L112

JO - Monthly Notices of the Royal Astronomical Society: Letters

JF - Monthly Notices of the Royal Astronomical Society: Letters

IS - 1

ER -

Radial distribution of stellar motions inGaiaDR2

Abstract

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