The AMBRE Project: Solar neighbourhood chemodynamical constraints on Galactic disc evolution

Abstract

We analysed the chemodynamical evolution of the Galactic disc using precise [Mg/Fe] abundances from a previous study and accurate Gaia data. For this purpose, we estimated ages and dynamical properties for 366 MSTO solar neighbourhood stars from the AMBRE Project using PARSEC isochrones together with astrometric and photometric values from Gaia DR2. We find a radial gradient of -0.099 $\pm$ 0.031 dex kpc${}^{-1}$ for [M/H] and +0.023 $\pm$ 0.009 dex kpc for the [Mg/Fe] abundance. The steeper [Mg/Fe] gradient than that found in the literature is a result of the improvement of the AMBRE [Mg/Fe] estimates in the metal-rich regime. In addition, we find a significant spread of stellar age at any given [Mg/Fe] value, and observe a clear correlated dispersion of the [Mg/Fe] abundance with metallicity at a given age. While for [M/H] < -0.2, a clear age-[Mg/Fe] trend is observed, more metal-rich stars display ages from 3 up to 12 Gyr, describing an almost flat trend in the [Mg/Fe]-age relation. Moreover, we report the presence of radially migrated stars for a wide range of stellar ages, although we note the large uncertainties of the amplitude of the inferred change in orbital guiding radii. Finally, we observe the appearance of a second chemical sequence in the outer disc, 10-12 Gyr ago, populating the metal-poor, low-[Mg/Fe] tail. These stars are more metal-poor than the coexisting stellar population in the inner parts of the disc, and show lower [Mg/Fe] abundances than prior disc stars of the same metallicity, leading to a chemical discontinuity. Our data favour the rapid formation of an early disc that settled in the inner regions, followed by the accretion of external metal-poor gas -- probably related to a major accretion event such as the Gaia-Enceladus/Sausage one -- that may have triggered the formation of the thin disc population and steepened the abundance gradient in the early disc.

arXiv commentAccepted for publication in A&A

References in corpus (121)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• A Universal Density Profile from Hierarchical Clustering
• Gaia Data Release 2. Summary of the contents and survey properties
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Gaia Data Release 2: The astrometric solution
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
• galpy: A Python Library for Galactic Dynamics
• The merger that led to the formation of the Milky Way's inner stellar halo and thick disk
• 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
• A fundamental relation between mass, SFR and metallicity in local and high redshift galaxies
• The mass distribution and gravitational potential of the Milky Way
• 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
• Gaia Data Release 2: Photometric content and validation
• Chemical evolution with radial mixing
• Abundance Gradients and the Formation of the Milky Way
• 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
• Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program.Galactic stellar populations and planets
• The age structure of stellar populations in the solar vicinity. Clues of a two-phase formation history of the Milky Way disk
• Evidence for Two Early Accretion Events That Built the Milky Way Stellar Halo
• A dynamically young and perturbed Milky Way disk
• Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
• Galactic Reddening in 3D from Stellar Photometry - An Improved Map
• Chemodynamical evolution of the Milky Way disk I: The solar vicinity
• A new implementation of the infrared flux method using the 2MASS catalogue
• Quantifying the uncertainties of chemical evolution studies. II. Stellar yields
• Evidence from the H3 Survey that the Stellar Halo is Entirely Comprised of Substructure
• Chemo-spectrophotometric evolution of spiral galaxies: I. The model and the Milky Way
• The Biggest Splash
• Footprints of the Sagittarius dwarf galaxy in the $Gaia$ data set
• The origin of accreted stellar halo populations in the Milky Way using APOGEE, $\text{Gaia}$, and the EAGLE simulations
• The birth of the Milky Way as uncovered by accurate stellar ages with Gaia
• Chemodynamical evolution of the Milky Way disk II: Variations with Galactic radius and height above the disk plane
• The Gaia-ESO Survey: the Galactic Thick to Thin Disc transition
• The stellar population structure of the Galactic disk
• 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
• Metallicity Gradients in Disks: Do Galaxies Form Inside-Out?
• Chemodynamics of the Milky Way. I. The first year of APOGEE data
• The Sausage Globular Clusters
• Tracing chemical evolution over the extent of the Milky Way's Disk with APOGEE Red Clump Stars
• The Gaia-ESO Survey: radial metallicity gradients and age-metallicity relation of stars in the Milky Way disk
• On the fine structure of the Cepheid metallicity gradient in the Galactic thin disk
• Estimating stellar birth radii and the time evolution of the Milky Way's ISM metallicity gradient
• Galactic Archaeology with asteroseismic ages: evidence for delayed gas infall in the formation of the Milky Way disc
• Young [$\alpha$/Fe]-enhanced stars discovered by CoRoT and APOGEE: What is their origin?
• The age-metallicity structure of the Milky Way disk
• The evolution of the Galactic metallicity gradient from high-resolution spectroscopy of open clusters
• Chemical Cartography with APOGEE: Large-scale Mean Metallicity Maps of the Milky Way
• On the origin of the chemical bimodality of disk stars: A tale of merger and migration
• Constraining Sub-Grid Physics with High-Redshift Spatially-Resolved Metallicity Distributions
• VINTERGATAN I: The origins of chemically, kinematically and structurally distinct discs in a simulated Milky Way-mass galaxy
• Gaia FGK benchmark stars: abundances of alpha and iron-peak elements
• The Open Cluster Chemical Abundances and Mapping Survey: IV. Abundances for 128 Open Clusters using SDSS/APOGEE DR16
• Confirming chemical clocks: asteroseismic age dissection of the Milky Way disk(s)
• Signatures of radial migration in barred galaxies: Azimuthal variations in the metallicity distribution of old stars
• Automated derivation of stellar atmospheric parameters and chemical abundances: the MATISSE algorithm
• Distances and parallax bias in Gaia DR2
• The dominant epoch of star formation in the Milky Way formed the thick disc
• Metallicity Gradients in the Milky Way Disk as Observed by the SEGUE Survey
• The AMBRE project: A new synthetic grid of high-resolution FGKM stellar spectra
• Abundance to age ratios in the HARPS-GTO sample with Gaia DR2: Chemical clocks for a range of [Fe/H]
• Kinematic modelling of the Milky Way using the RAVE and GCS stellar surveys
• Chronologically dating the early assembly of the Milky Way
• The Gaia-ESO Survey: the chemical structure of the Galactic discs from the first internal data release
• The GALAH survey: An abundance, age, and kinematic inventory of the solar neighbourhood made with TGAS
• High-precision abundances of elements in solar-type stars. Evidence of two distinct sequences in abundance-age relations
• The Gaia-ESO Survey: radial distribution of abundances in the Galactic disc from open clusters and young field stars
• The echo of the bar buckling: phase-space spirals in Gaia DR2
• The Open Cluster Chemical Analysis and Mapping Survey: Local Galactic Metallicity Gradient with APOGEE using SDSS DR10
• The SkyMapper-Gaia RVS view of the Gaia-Enceladus-Sausage -- an investigation of the metallicity and mass of the Milky Way's last major merger
• The GALAH survey: tracing the Galactic disk with Open Clusters
• The AMBRE Project: chemical evolution models for the Milky Way thick and thin discs
• Chemical Enrichment and Radial Migration in the Galactic Disk -- the origin of the [$\alpha /\mathrm{Fe}]$ Double Sequence
• Effects of radial flows on the chemical evolution of the Milky Way disk
• Gaia Early Data Release 3: The Galactic anticentre
• The AMBRE project: The thick thin disk and thin thick disk of the Milky Way
• Understanding inverse metallicity gradients in galactic discs as a consequence of inside-out formation
• Cannibals in the thick disk: the young $\alpha -$rich stars as evolved blue stragglers
• Distance determination for RAVE stars using stellar models II: Most likely values assuming a standard stellar evolution scenario
• The Rich Are Different: Evidence from the RAVE Survey for Stellar Radial Migration
• In the Galactic disk, stellar [Fe/H] and age predict orbits and precise [X/Fe]
• Open clusters in APOGEE and GALAH: Combining Gaia and ground-based spectroscopic surveys
• Chemical gradients in the Milky Way from the RAVE data. I. Dwarf stars
• High-precision abundances of elements in Kepler LEGACY stars. Verification of trends with stellar age
• Galactic Archaeology with asteroseismic ages. II. Confirmation of a delayed gas infall using Bayesian analysis based on MCMC methods
• Stellar migrations and metal flows -- Chemical evolution of the thin disc of a simulated Milky Way analogous galaxy
• The Gaia-ESO Survey: Characterisation of the [alpha/Fe] sequences in the Milky Way discs
• On the alpha-element gradients of the Galactic thin disk using Cepheids
• The AMBRE Project: Stellar parameterisation of the ESO:FEROS archived spectra
• The Gaia-ESO Survey: a new approach to chemically characterising young open clusters
• 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
• Chemical evolution of the Milky Way: constraints on the formation of the thick and thin discs
• Bimodality of [α/Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies
• Revisiting long-standing puzzles of the Milky Way: the Sun and its vicinity as typical outer disk chemical evolution
• The GALAH Survey: Chemodynamics of the Solar Neighbourhood
• Abundance gradients along the Galactic disc from chemical evolution models
• Unveiling the Distinct Formation Pathways of the Inner and Outer Discs of the Milky Way with Bayesian Machine Learning
• The effect of stellar migration on Galactic chemical evolution: a heuristic approach
• The AMBRE project: Iron-peak elements in the solar neighbourhood
• The relation between chemical abundances and kinematics of the Galactic disc with RAVE
• Radial migration in a stellar galactic disc with thick components
• Cold accretion flows and chemical bimodality of the Milky Way galaxy
• Testing systematics of Gaia DR2 parallaxes with empirical surface brightness -- color relations applied to eclipsing binaries
• Chemical separation of disc components using RAVE
• Constraining churning and blurring in the Milky Way using large spectroscopic surveys -- an exploratory study
• Radial structure and formation of the Milky Way disc
• The AMBRE Project: Parameterisation of FGK-type stars from the ESO:HARPS archived spectra
• Did Sgr cause the vertical waves in the solar neighbourhood?
• The chemodynamics of prograde and retrograde Milky Way stars
• The AMBRE Project: Origin and evolution of sulfur in the Milky Way
• Chemodynamic subpopulations of the Carina dwarf galaxy
• The AMBRE Project: Spectrum normalisation influence on Mg abundances in the metal-rich Galactic disc
• The assembly history of the Galactic inner halo inferred from alpha-patterns
• Cardinal kinematics: I. Rotation fields of the APOGEE Survey
• The Rich Lack Close Neighbours: The Dependence of Blue-Straggler Fraction on Metallicity
• High-resolution spectroscopic study of dwarf stars in the northern sky: Na to Zn abundances in two fields with radii of 20 degrees

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• Mapping radial abundance gradients with Gaia-ESO open clusters: Evidence of recent gas accretion in the Milky Way disk
• Analytic solution of Chemical Evolution Models with Type Ia SNe
• Disc dichotomy signature in the vertical distribution of [Mg/Fe] and the delayed gas infall scenario
• Stellar dating using chemical clocks and Bayesian inference
• Double Red Giant Branch and Red Clump features of Galactic disc stellar populations with Gaia GSPspec
• Constraints on the history of Galactic spiral arms revealed by Gaia GSP-Spec alpha-elements
• The Gaia spectroscopic catalogue of exoplanets and host stars
• Gaia/GSP-spec spectroscopic properties of gamma Doradus pulsators
• Shaping Galactic Habitability: the impact of stellar migration and gas giants
• Chemical characterisation of the X-shooter Spectral Library (XSL): [Mg/Fe] and [Ca/Fe] abundances
• CHEMOUT: CHEMical complexity in star-forming regions of the OUTer Galaxy. V. Chemical composition gradients as a function of the galactocentric radius
• First large scale spatial and velocity patterns of local metal-rich stars in the Milky Way
• The AMBRE Project: Line-broadening and stellar rotation of ESO/FEROS archived spectra
• 3D elemental abundances of stars at formation across the histories of Milky Way-mass galaxies in the FIRE simulations