Deciphering the evolution of the Milky Way discs: Gaia APOGEE Kepler giant stars and the Besançon Galaxy Model

Abstract

We investigate the properties of the double sequences of the Milky Way discs visible in the [$\alpha$/Fe] vs [Fe/H] diagram. In the framework of Galactic formation and evolution, we discuss the complex relationships between age, metallicity, [$\alpha$/Fe], and the velocity components. We study stars with measured chemical, seismic and astrometric properties from the APOGEE survey, the Kepler and Gaia satellites, respectively. We separate the [$\alpha$/Fe]-[Fe/H] diagram into 3 stellar populations: the thin disc, the high-$\alpha$ metal-poor thick disc and the high-$\alpha$ metal-rich thick disc and characterise each of these in the age-chemo-kinematics parameter space. We compare results obtained from different APOGEE data releases and using two recent age determinations. We use the Besançon Galaxy model (BGM) to highlight selection biases and mechanisms not included in the model. The thin disc exhibits a flat age-metallicity relation while [$\alpha$/Fe] increases with stellar age. We confirm no correlation between radial and vertical velocities with [Fe/H], [$\alpha$/Fe] and age for each stellar population. Considering both samples, V${}_{\phi }$ decreases with age for the thin disc, while it increases with age for the h$\alpha$mp thick disc. Although the age distribution of the h$\alpha$mr thick disc is very close to that of the h$\alpha$mp thick disc between 7 and 14 Gyr, its kinematics seems to follow that of the thin disc. This feature, not predicted by the hypotheses included in the BGM, suggests a different origin and history for this population. Finally, we show that there is a maximum dispersion of the vertical velocity, ${\sigma }_Z$, with age for the h$\alpha$mp thick disc around 8 Gyr. The comparisons with the BGM simulations suggest a more complex chemo-dynamical scheme to explain this feature, most likely including mergers and radial migration effects

arXiv commentAccepted for publication in Aastronomy & Astrophysics on 28/06/2021, 19 pages, 16 figures

References in corpus (135)

• Gaia Data Release 2. Summary of the contents and survey properties
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• Local Kinematics and the Local Standard of Rest
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• The K2 Mission: Characterization and Early results
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
• The PLATO 2.0 Mission
• The merger that led to the formation of the Milky Way's inner stellar halo and thick disk
• SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
• The New Galaxy: Signatures of its Formation
• Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
• Radial Mixing in Galactic Discs
• Co-formation of the Galactic disc and the stellar halo
• The Chemical Evolution of the Galaxy: the two-infall model
• Elemental Abundance Survey of The Galactic Thick Disk
• Towards Better Age Estimates for Stellar Populations: The Y^2 Isochrones for Solar Mixture
• alpha-, r-, and s-process element trends in the Galactic thin and thick disks
• Chemical Cartography with APOGEE: Metallicity Distribution Functions and the Chemical Structure of the Milky Way Disk
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
• Simulations of Galaxy Formation in a Lambda CDM Universe II: The Fine Structure of Simulated Galactic Disks
• The age structure of stellar populations in the solar vicinity. Clues of a two-phase formation history of the Milky Way disk
• Asteroseismology of Solar-Type and Red-Giant Stars
• Fast core rotation in red-giant stars revealed by gravity-dominated mixed modes
• Estimating distances from parallaxes
• Spin down of the core rotation in red giants
• Chemodynamical evolution of the Milky Way disk I: The solar vicinity
• The spatial structure of mono-abundance sub-populations of the Milky Way disk
• Gaia Data Release 2: Mapping the Milky Way disc kinematics
• The Emergence of the Thick Disk in a CDM Universe
• The RAdial Velocity Experiment (RAVE): Fourth data release
• The Geneva-Copenhagen Survey of the Solar neighbourhood II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk
• Evidence from the H3 Survey that the Stellar Halo is Entirely Comprised of Substructure
• The thick disks of spiral galaxies as relics from gas-rich, turbulent, clumpy disks at high redshift
• Secular Evolution in Disk Galaxies
• Origin and structure of the Galactic disc(s)
• The APOKASC Catalog: An Asteroseismic and Spectroscopic Joint Survey of Targets in the Kepler Fields
• Structural Parameters of Thin and Thick Disks in Edge-On Disk Galaxies
• The Second APOKASC Catalog: The Empirical Approach
• The Biggest Splash
• The Milky Way has no thick disk
• APOGEE Data Releases 13 and 14: Data and Analysis
• The birth of the Milky Way as uncovered by accurate stellar ages with Gaia
• Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18
• Probing the core structure and evolution of red giants using gravity-dominated mixed modes observed with Kepler
• The Genesis of the Milky Way's Thick Disk via Stellar Migration
• Chemodynamical evolution of the Milky Way disk II: Variations with Galactic radius and height above the disk plane
• Vertical distribution of Galactic disk stars I - Kinematics and metallicity
• The Gaia-ESO Survey: the Galactic Thick to Thin Disc transition
• StarHorse: A Bayesian tool for determining stellar masses, ages, distances, and extinctions for field stars
• The Milky Way has no in-situ halo other than the heated thick disc. Composition of the stellar halo and age-dating the last significant merger with Gaia DR2 and APOGEE
• Dynamical heating across the Milky Way disc using APOGEE and $Gaia$
• Formation and Evolution of the Disk System of the Milky Way: [alpha/Fe] Ratios and Kinematics of the SEGUE G-Dwarf Sample
• Thin disc, Thick Disc and Halo in a Simulated Galaxy
• Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant stars
• Chemodynamics of the Milky Way. I. The first year of APOGEE data
• Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program II: Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd and Eu
• The Gaia-ESO Survey: radial metallicity gradients and age-metallicity relation of stars in the Milky Way disk
• A Structural and Dynamical Study of Late-Type, Edge-On Galaxies: II. Vertical Color Gradients and the Detection of Ubiquitous Thick Disks
• Young [$\alpha$/Fe]-enhanced stars discovered by CoRoT and APOGEE: What is their origin?
• Radial Migration Does Little for Galactic Disc Thickening
• The age-metallicity structure of the Milky Way disk
• Age dissection of the Milky Way discs: red giants in the Kepler field
• Period spacings in red giants II. Automated measurement
• From the bulge to the outer disc: StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys
• Carbon, nitrogen and $\alpha$-element abundances determine the formation sequence of the Galactic thick and thin disks
• Core rotation braking on the red giant branch for various mass ranges
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- II: Stellar Atmospheric Parameters, Chemical Abundances and Distances
• Constraining the thick disc formation scenario of the Milky Way
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- I: Survey Description, Spectra and Radial Velocities
• Kinematics and chemical properties of the Galactic stellar populations. The HARPS FGK dwarfs sample
• Tracing the Galactic thick disk to Solar metallicities
• The Besancon Galaxy model renewed I. Constraints on the local star formation history from Tycho data
• Measuring the vertical age structure of the Galactic disc using asteroseismology and SAGA
• Red giants observed by CoRoT and APOGEE: The evolution of the Milky Way's radial metallicity gradient
• Accretion relicts in the solar neighbourhood: debris from omegaCen's parent galaxy
• The total stellar halo mass of the Milky Way
• Bayesian analysis of ages, masses, and distances to cool stars with non-LTE spectroscopic parameters
• Kinematic modelling of the Milky Way using the RAVE and GCS stellar surveys
• Chronologically dating the early assembly of the Milky Way
• High-precision abundances of elements in solar-type stars. Evidence of two distinct sequences in abundance-age relations
• Oscillating K giants with the WIRE satellite: determination of their asteroseismic masses
• The Emergence of the Thick Disk in a CDM Universe II: Colors and Abundance Patterns
• Dark Halos of M31 and the Milky Way
• Gaia DR2 reveals a star formation burst in the disc 2-3 Gyr ago
• Weighing the stellar constituents of the Galactic halo with APOGEE red giant stars
• Galactic Archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE
• Dissecting simulated disc galaxies II: the age-velocity relation
• PLATO as it is: a legacy mission for Galactic archaeology
• Recovering the star formation rate in the solar neighborhood
• Cannibals in the thick disk: the young $\alpha -$rich stars as evolved blue stragglers
• Two Disk Components from a Gas Rich Disk-Disk Merger
• A new stellar chemo-kinematic relation reveals the merger history of the Milky Way disc
• More dynamical models of our Galaxy
• Evidence for a sharp structure variation inside a red-giant star
• Dissecting stellar chemical abundance space with t-SNE
• The age-velocity dispersion relation of the Galactic discs from LAMOST-Gaia data
• Age-resolved chemistry of red giants in the solar neighbourhood
• Revisiting two local constraints of the Galactic chemical evolution
• Age dating of an early Milky Way merger via asteroseismology of the naked-eye star $\nu$ Indi
• In the thick of it: metal-poor disc stars in RAVE
• Galactic Archaeology with asteroseismic ages. II. Confirmation of a delayed gas infall using Bayesian analysis based on MCMC methods
• Phylogeny of the Milky Way's inner disk and bulge populations: Implications for gas accretion, (the lack of) inside-out thick disk formation, and quenching
• Kinematics of the local disk from the RAVE survey and the Gaia first data release
• The relationship between mono-abundance and mono-age stellar populations in the Milky Way disk
• The Gaia-ESO survey: impact of extra-mixing on C- and N-abundances of giant stars
• Determining Ages of APOGEE Giants with Known Distances
• Unveiling the Distinct Formation Pathways of the Inner and Outer Discs of the Milky Way with Bayesian Machine Learning
• Population synthesis to constrain Galactic and Stellar Physics- I- Determining age and mass of thin-disc red-giant stars
• The relation between chemical abundances and kinematics of the Galactic disc with RAVE
• Evidence of a thick disk rotation-metallicity correlation
• How accurate are stellar ages based on stellar models ? I. The impact of stellar models uncertainties
• The Gaia-ESO Survey: New constraints on the Galactic disc velocity dispersion and its chemical dependencies
• Chemical separation of disc components using RAVE
• Chemical and Kinematic Properties of the Galactic Disk from the LAMOST and Gaia Sample Stars
• The GALAH survey: properties of the Galactic disk(s) in the solar neighbourhood
• An inverse method to interpret colour-magnitude diagrams
• Quasi integral of motion for axisymmetric potentials
• The Milky Way's Shell Structure Reveals the Time of a Radial Collision
• Chemo-kinematics of the Milky Way from the SDSS-III MARVELS Survey
• The K2 Galactic Caps Project -- Going Beyond the \textit{Kepler} Field and Ageing the Galactic Disc
• How accurate are stellar ages based on stellar models? II. The impact of asteroseismology
• Explaining the decrease in ISM lithium at super-solar metallicities in the solar vicinity
• Milky Way's Thick and Thin disk: Is there distinct thick disk?
• Constraining the Galactic potential via action-based distribution functions for mono-abundance stellar populations
• Characteristics of the two sequences seen in the high-velocity Hertzsprung-Russell diagram in Gaia DR2
• The Rotation-Metallicity Relation for the Galactic Disk as Measured in the Gaia DR1 TGAS and APOGEE Data
• Constraining the Milky Way assembly history with Galactic Archaeology. Ludwig Biermann Award Lecture 2015
• A new dynamically self-consistent version of the Besançon Galaxy Model
• From K giants to G dwarfs: stellar lifetime effects on metallicity distributions derived from red giants
• Galactic Archaeology with CoRoT and APOGEE: Creating mock observations from a chemodynamical model

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• Euclid. I. Overview of the Euclid mission
• StarHorse results for spectroscopic surveys + Gaia DR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young-alpha rich stars
• Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
• Euclid: Early Release Observations -- Programme overview and pipeline for compact- and diffuse-emission photometry
• A self-consistent dynamical model of the Milky Way disc adjusted to Gaia data
• How the origin of stars in the Galaxy impacts the composition of planetary building blocks
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• The Gaia-ESO Survey: Old super-metal-rich visitors from the inner Galaxy
• Double Red Giant Branch and Red Clump features of Galactic disc stellar populations with Gaia GSPspec
• Chronology of our Galaxy from Gaia colour-magnitude diagram fitting (ChronoGal) II. Unveiling the formation and evolution of the kinematically selected Thick and Thin Discs
• Exploring the impact of a rapidly decelerating bar on transforming bulge orbits into disc-like orbits
• VPNEP: Detailed characterization of TESS targets around the Northern Ecliptic Pole
• Quantifying chemical and kinematical properties of Galactic disks
• Trustworthy scientific inference with generative models
• Calibration of the [C/N] and [Y/Mg] chemical clocks with asteroseismic ages from the TESS space mission
• The Gaia Ultracool Dwarf Sample -- IV. GTC/OSIRIS optical spectra of Gaia late-M and L dwarfs