The Solar neighbourhood in angle coordinates: the Hyades moving group

Abstract

I investigate the suggestion that the Hyades moving group in the Solar neighbourhood is the result of a recent inner Lindblad resonance. I use dynamical "torus" models of the Galaxy to understand the expected distribution of solar neighbourhood stars in angle coordinates for phase-mixed models and models which include a resonant component. I show that attempts to find the signatures of resonances in angle coordinates are strongly influenced by selection effects, including rather subtle effects associated with the relationship between action and angle for stars at a given point. These effects mean that one can not use simple tests to determine whether substructures seen in the Solar neighbourhood are associated with any given resonance.

11 pages, 12 figures, MNRAS submitted

References in corpus (4)

• The Radial Velocity Experiment (RAVE): first data release
• Mass models of the Milky Way
• Models of our Galaxy II
• Disassembling the Galaxy with angle-action coordinates

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• The Orbital Histories of Magellanic Satellites Using Gaia DR2 Proper Motions
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• The Galactic Disc in Action Space as seen by Gaia DR2
• The properties of the local spiral arms from RAVE data: two-dimensional density wave approach
• More dynamical models of our Galaxy
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• Modelling the Galactic disc: perturbed distribution functions in the presence of spiral arms
• Identifying resonances of the Galactic bar in Gaia DR2: I. Clues from action space
• The Orbital Ellipticity of Satellite Galaxies and the Mass of the Milky Way
• Trapped orbits and solar-neighbourhood kinematics
• Angle-action estimation in a general axisymmetric potential
• Discriminating among theories of spiral structure using Gaia DR2
• Identifying resonances of the Galactic bar in Gaia DR2: II. Clues from angle space
• The Connection between Star Formation and Metallicity Evolution in Barred Spiral Galaxies
• Extending the Hyades
• The power of co-ordinate transformations in dynamical interpretations of Galactic structure
• The imprints of the Galactic bar on the thick disk with RAVE
• Secular resonant dressed orbital diffusion I : method and WKB limit for tepid discs
• Secular resonant dressed orbital diffusion II : application to an isolated self similar tepid galactic disc
• Kinematically Detected Halo Streams
• Bar Properties and Star-by-Star Bar Membership via Action Conservation