Radial phase spirals in the Solar neighbourhood

Abstract

The second data release of ESA's $Gaia$ mission revealed numerous signatures of disequilibrium in the Milky Way's disc. These signatures are seen in the planar kinematics of stars, which manifest as ridges and ripples in $R-v_{\varphi }$, and in vertical kinematics, where a prominent spiral is seen in the $z-v_z$ phase space. In this work, we show an equivalent $\Delta R-v_{\mathrm{R}}$ phase spiral forms following a perturbation to the disc. We demonstrate the behaviour of the $\Delta R-v_{\mathrm{R}}$ phase spirals in both a toy model and a high resolution $N$-body simulation of a satellite interaction. We then confront these models with the data, where we find partial $\Delta R-v_{\mathrm{R}}$ phase spirals in the Solar neighborhood using the most recent data from $Gaia$ DR3. This structure indicates ongoing radial phase mixing in the Galactic disc, suggesting a history of recent perturbations, either through internal or external (e.g., satellite) processes. Future work modelling the $z-v_z$ and $\Delta R-v_{\mathrm{R}}$ phase spirals in tandem may help break degeneracy's between possible origins of the perturbation.

arXiv comment13 pages, 10 figures, published in MNRAS

References in corpus (64)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Astropy: A Community Python Package for Astronomy
• A Universal Density Profile from Hierarchical Clustering
• Gaia Data Release 2. Summary of the contents and survey properties
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• On the variation of the Initial Mass Function
• The Gaia mission
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Gaia Data Release 3: Summary of the content and survey properties
• galpy: A Python Library for Galactic Dynamics
• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• The merger that led to the formation of the Milky Way's inner stellar halo and thick disk
• Co-formation of the Galactic disc and the stellar halo
• AGAMA: Action-based galaxy modelling architecture
• A dynamically young and perturbed Milky Way disk
• Vertical waves in the solar neighbourhood in Gaia DR2
• CMasher: Scientific colormaps for making accessible, informative and 'cmashing' plots
• Actions for axisymmetric potentials
• Equilibrium Disk-Bulge-Halo Models for the Milky Way and Andromeda Galaxies
• The Influence of Sagittarius and the Large Magellanic Cloud on the Milky Way Galaxy
• Improved GRAVITY astrometric accuracy from modeling of optical aberrations
• A sparse octree gravitational N-body code that runs entirely on the GPU processor
• The Proper Motion of Sagittarius A*: III. The Case for a Supermassive Black Hole
• Response of the Milky Way's disc to the Large Magellanic Cloud in a first infall scenario
• Is the Milky Way ringing? The hunt for high velocity streams
• Radial Distribution of Stellar Motions in Gaia DR2
• The echo of the bar buckling: phase-space spirals in Gaia DR2
• Galactic seismology: the evolving "phase spiral" after the Sagittarius dwarf impact
• The last breath of the Sagittarius dSph
• Riding the kinematic waves in the Milky Way disk with Gaia
• The GALAH survey and Gaia DR2: Linking ridges, arches and vertical waves in the kinematics of the Milky Way
• Gaia Early Data Release 3: The Galactic anticentre
• Extended distribution functions for our Galaxy
• More dynamical models of our Galaxy
• Signatures of resonance and phase mixing in the Galactic disc
• On the ridges, undulations & streams in Gaia DR2: Linking the topography of phase-space to the orbital structure of an N-body bar
• 24.77 Pflops on a Gravitational Tree-Code to Simulate the Milky Way Galaxy with 18600 GPUs
• Identifying resonances of the Galactic bar in Gaia DR2: I. Clues from action space
• Aurigaia: mock Gaia DR2 stellar catalogues from the Auriga cosmological simulations
• Multiple phase spirals suggest multiple origins in Gaia DR3
• Angle-action estimation in a general axisymmetric potential
• SciServer: a Science Platform for Astronomy and Beyond
• Exploring the Sgr-Milky-Way-disc interaction using high resolution N-body simulations
• Discriminating among theories of spiral structure using Gaia DR2
• The phase spiral in Gaia DR3
• The origin and fate of the Gaia phase-space snail
• Energy wrinkles and phase-space folds of the last major merger
• Galactic Bar Resonances Inferred from Kinematically Hot Stars in Gaia EDR3
• The Hercules stream as seen by APOGEE-2 South
• Vertical motion in the Galactic disc: unwinding the Snail
• An ever-present $Gaia$ snail shell triggered by a dark matter wake
• Vertical Phase Mixing across the Galactic Disk
• The stellar kinematics of co-rotating spiral arms in Gaia mock observations
• Orbital Torus Imaging: Using Element Abundances to Map Orbits and Mass in the Milky Way
• Snails Across Scales: Local and Global Phase-Mixing Structures as Probes of the Past and Future Milky Way
• Weighing the Galactic disk using phase-space spirals III. Probing distant regions of the disk using the Gaia EDR3 proper motion sample
• Swing Amplification and the Gaia Phase Spirals
• The power of co-ordinate transformations in dynamical interpretations of Galactic structure
• Investigating the amplitude and rotation of the phase spiral in the Milky Way outer disc
• Weighing the Galactic disk using phase-space spirals IV. Tests on a three-dimensional galaxy simulation
• Measuring the Milky Way Vertical Potential with the Phase Snail in a Model Independent Way
• Galactoseismology in cosmological simulations: Vertical perturbations by dark matter, satellite galaxies and gas
• Orbital Torus Imaging: Acceleration, density, and dark matter in the Galactic disk measured with element abundance gradients

Cited by in corpus (6)

• Limitations and rotation of the two-armed phase spiral in the Milky Way stellar disc
• Rediscovering the Milky Way with orbit superposition approach and APOGEE data II. Chrono-chemo-kinematics of the disc
• Delayed phase mixing in the self-gravitating Galactic disc
• Dynamics of tidal spiral arms: Machine learning-assisted identification of equations and application to the Milky Way
• Metal-rich stellar counterpart of the Radcliffe Wave and the 3D chemical footprints of the Milky Way spiral arms
• Phase spirals induced by the gas warp