Is the Milky Way still breathing? RAVE-Gaia streaming motions

Abstract

We use data from the Radial Velocity Experiment (RAVE) and the Tycho-Gaia astrometric solution catalogue (TGAS) to compute the velocity fields yielded by the radial (VR), azimuthal (Vphi) and vertical (Vz) components of associated Galactocentric velocity. We search in particular for variation in all three velocity components with distance above and below the disc midplane, as well as how each component of Vz (line-of-sight and tangential velocity projections) modifies the obtained vertical structure. To study the dependence of velocity on proper motion and distance we use two main samples: a RAVE sample including proper motions from the Tycho-2, PPMXL and UCAC4 catalogues, and a RAVE-TGAS sample with inferred distances and proper motions from the TGAS and UCAC5 catalogues. In both samples, we identify asymmetries in VR and Vz. Below the plane we find the largest radial gradient to be dVR / dR = -7.01+- 0.61 km\s kpc, in agreement with recent studies. Above the plane we find a similar gradient with dVR / dR= -9.42+- 1.77 km\s kpc. By comparing our results with previous studies, we find that the structure in Vz is strongly dependent on the adopted proper motions. Using the Galaxia Milky Way model, we demonstrate that distance uncertainties can create artificial wave-like patterns. In contrast to previous suggestions of a breathing mode seen in RAVE data, our results support a combination of bending and breathing modes, likely generated by a combination of external or internal and external mechanisms.

arXiv comment19 p., 17 fig., accepted MNRAS

References in corpus (63)

• The Gaia mission
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• Local Kinematics and the Local Standard of Rest
• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• The Eighth Data Release of the Sloan Digital Sky Survey: First Data from SDSS-III
• SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• The Radial Velocity Experiment (RAVE): first data release
• The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and 2MASS
• The Proper Motion of Sgr A*: II. The Mass of Sgr A*
• An absolutely calibrated effective temperature scale from the InfraRed Flux Method
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• The Radial Velocity Experiment (RAVE): Fifth Data Release
• Estimating distances from parallaxes
• The Effect of the Outer Lindblad Resonance of the Galactic Bar on the Local Stellar Velocity Distribution
• Three Dimensional Structure of the Milky Way Disk
• Local kinematics of K and M giants from Coravel/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters
• The RAdial Velocity Experiment (RAVE): Fourth data release
• The Distribution of Nearby Stars in Velocity Space Inferred from Hipparcos Data
• Galaxia: a code to generate a synthetic survey of the Milky Way
• Galactoseismology: Discovery of Vertical Waves in the Galactic Disk
• The wobbly Galaxy: kinematics north and south with RAVE red clump giants
• Rings and Radial Waves in the Disk of the Milky Way
• Vertical density waves in the Milky Way disc induced by the Sagittarius Dwarf Galaxy
• The Vertical Structure of the Outer Milky Way HI Disk
• Order and chaos in the local disc stellar kinematics induced by the Galactic bar
• The uncertainty in Galactic parameters
• Dark matter in the Milky Way, II. the HI gas distribution as a tracer of the gravitational potential
• The RAdial Velocity Experiment (RAVE): Third Data Release
• The Mass Profile of the Galaxy to 80 kpc
• UCAC5: New Proper Motions using Gaia DR1
• The Effect of Spiral Structure on the Stellar Velocity Distribution in the Solar Neighborhood
• Is the Milky Way ringing? The hunt for high velocity streams
• Estimating distances from parallaxes. III. Distances of two million stars in the Gaia DR1 catalogue
• Bending and Breathing Modes of the Galactic Disk
• Substructure in bulk velocities of Milky Way disk stars
• Constraints on the Galactic Bar from the Hercules stream as traced with RAVE across the Galaxy
• Radial and vertical flows induced by galactic spiral arms: likely contributors to our "wobbly Galaxy''
• Origin and evolution of moving groups I. Characterization in the observational kinematic-age-metallicity space
• Low-Velocity Streams in the Solar Neighborhood Caused by the Galactic Bar
• The properties of the local spiral arms from RAVE data: two-dimensional density wave approach
• New distances to RAVE stars
• Detection of a radial velocity gradient in the extended local disc with RAVE
• A fully cosmological model of a Monoceros-like ring
• On the age heterogeneity of the Pleiades, Hyades and Sirius moving groups
• Modelling the Galactic disc: perturbed distribution functions in the presence of spiral arms
• Excitation of coupled stellar motions in the Galactic Disk by orbiting satellites
• In the thick of it: metal-poor disc stars in RAVE
• Tracing the Hercules stream with Gaia and LAMOST: new evidence for a fast bar in the Milky Way
• Signatures of minor mergers in the Milky Way disc I: The SEGUE stellar sample
• Baade-Wesselink distances to Galactic and Magellanic Cloud Cepheids and the effect of metallicity
• Signatures of minor mergers in Milky Way-like disc kinematics: Ringing revisited
• Chemically tagging the Hyades stream: Does it partly originate from the Hyades cluster?
• The vertical effects of disc non-axisymmetries from perturbation theory: the case of the Galactic bar
• Phase Wrapping of Epicyclic Perturbations in the Wobbly Galaxy
• Spontaneous generation of bending waves in isolated Milky Way-like discs
• The kinematics of the white dwarf population from the SDSS DR12
• The selection function of the RAVE survey
• Extending the Hyades
• The Galactic bar and the large scale velocity gradients in the Galactic disk
• The kinematic signature of the Galactic warp in Gaia DR1 - I. The Hipparcos subsample
• A Global Correction to PPMXL Proper Motions

Cited by in corpus (43)

• Vertical waves in the solar neighbourhood in Gaia DR2
• Gaia Data Release 2: Mapping the Milky Way disc kinematics
• Footprints of the Sagittarius dwarf galaxy in the $Gaia$ data set
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- II: Stellar Atmospheric Parameters, Chemical Abundances and Distances
• Warp, Waves, and Wrinkles in the Milky Way
• Radial Distribution of Stellar Motions in Gaia DR2
• The echo of the bar buckling: phase-space spirals in Gaia DR2
• Multiple phase spirals suggest multiple origins in Gaia DR3
• Bending Waves in the Milky Way's disc from halo substructure
• Gaia kinematics reveal a complex lopsided and twisted Galactic disc warp
• Measuring the local dark matter density with LAMOST DR5 and Gaia DR2
• Kinematics with Gaia DR2: The Force of a Dwarf
• Chemo-dynamical properties of the Anticenter Stream: a surviving disc fossil from a past satellite interaction
• Mapping the Galactic disk with the LAMOST and Gaia Red clump sample. VI: An evidence for the long lived non-steady warp of non-gravitational scenarios
• Mapping the Galactic disk with the LAMOST and Gaia Red clump sample. II. 3D asymmetrical kinematics of mono-age populations in the disk between 6$-14$ \,kpc
• Implications of a time-varying Galactic potential for determinations of the dynamical surface density
• Gaia-DR2 extended kinematical maps. Part I: Method and application
• Exploring the pertubed Milky Way disk and the substructures of the outer disk
• Gaia-DR2 extended kinematical maps. Part II: Dynamics in the Galactic disk explaining radial and vertical velocities
• A self-consistent dynamical model of the Milky Way disc adjusted to Gaia data
• Stellar disc streams as probes of the Galactic potential and satellite impacts
• Milky Way Accelerometry via Millisecond Pulsar Timing
• Excitation of vertical breathing motion in disc galaxies by tidally-induced spirals in fly-by interactions
• The Galactic disc phase spirals at different Galactic positions revealed by Gaia and LAMOST data
• Age dissection of the vertical breathing motions in Gaia DR2: evidence for spiral driving
• Age-metallicity dependent stellar kinematics of the Milky Way disc from LAMOST and Gaia
• The tilt of the velocity ellipsoid in the Milky Way with Gaia DR2
• Correlations between age, kinematics, and chemistry as seen by the RAVE survey
• Directional Detection of Dark Matter Using Solid-State Quantum Sensing
• The vertical force in the Solar Neighbourhood using red clump stars in TGASxRAVE - Constraints on the local dark matter density
• The North/South Asymmetry of the Galaxy: Possible Connection to the Vertical Phase Space Snail
• Residuals of an Equilibrium Model for the Galaxy Reveal a State of Disequilibrium in the Solar Neighborhood
• Evidence for Populations-dependent vertical motions and the Long-lived Non-Steady Lopsided Milky Way Warp
• The spiral potential of the Milky Way
• Asymmetric Mean Metallicity Distribution of the Milky Way's Disk
• Radial velocities in the outermost disk toward the anticenter
• The Panchromatic Hubble Andromeda Treasury XX: The Disk of M31 is Thick
• Vertical structure of Galactic disk kinematics from LAMOST K giants
• Gaussian Process Model for the Local Stellar Velocity Field from Gaia Data Release 2
• Milky Way Halo Vibrations and Incommensurate Stream Velocities
• Coronal heating problem solution by means of axion origin photons
• Signatures of Galactic Expansion in Gaia DR3: Implications for the JWST Early-Galaxy Puzzle
• Thermomagnetic Ettingshausen-Nernst effect in tachocline, magnetic reconnection phenomenon in lower layers, axion mechanism of solar luminosity variations, coronal heating problem solution and mechanism of ADM variations around BH