Age dissection of the Milky Way discs: red giants in the Kepler field

Abstract

[Abridged] Ensemble studies of red-giant stars with exquisite asteroseismic, spectroscopic, and astrometric constraints offer a novel opportunity to recast and address long-standing questions concerning the evolution of stars and of the Galaxy. Here, we infer masses and ages for nearly 5400 giants with available Kepler light curves and APOGEE spectra, and discuss some of the systematics that may affect the accuracy of the inferred stellar properties. First, we look at age-chemical-abundances relations. We find a dearth of young, metal-rich stars, and the existence of a significant population of old (8-9 Gyr), low-[$\alpha$/Fe], super-solar metallicity stars, reminiscent of the age and metallicity of the well-studied open cluster NGC6791. The age-chemo-kinematic properties of these stars indicate that efficient radial migration happens in the thin disk. We find that ages and masses of the nearly 400 $\alpha$-element-rich red-giant-branch (RGB) stars in our sample are compatible with those of an old (~11 Gyr), nearly coeval, chemical-thick disk population. Using a statistical model, we show that 95% of the population was born within ~1.5 Gyr. Moreover, we find a difference in the vertical velocity dispersion between low- and high-[$\alpha$/Fe] populations, confirming their different chemo-dynamical histories. We then exploit the almost coeval $\alpha$-rich population to gain insight into processes that may have altered the mass of a star along its evolution, which are key to improve the mapping of the observed stellar mass to age. We find evidence for a mean integrated RGB mass loss <$\Delta$M>= 0.10 $\pm$ 0.02 Msun and that the occurrence of massive (M $\gtrsim$ 1.1 Msun) $\alpha$-rich stars is of the order of 5% on the RGB, and significantly higher in the RC, supporting the scenario in which most of these stars had undergone interaction with a companion.

arXiv commentaccepted for publication in A&A, 26 pages, 24 figures, catalogue available via cds

References in corpus (191)

• The chemical composition of the Sun
• Gaia Data Release 2. Summary of the contents and survey properties
• Modules for Experiments in Stellar Astrophysics (MESA)
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Cosmic Star Formation History
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Gaia Data Release 2: The astrometric solution
• Local Kinematics and the Local Standard of Rest
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The Dartmouth Stellar Evolution Database
• galpy: A Python Library for Galactic Dynamics
• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• The merger that led to the formation of the Milky Way's inner stellar halo and thick disk
• 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
• New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey
• The Origin of Subdwarf B Star (I): the Formation Channels
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• Abundance Gradients and the Formation of the Milky Way
• Star counts in the Galaxy. Simulating from very deep to very shallow photometric surveys with the TRILEGAL code
• Chemical Cartography with APOGEE: Metallicity Distribution Functions and the Chemical Structure of the Milky Way Disk
• Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant
• Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
• The age structure of stellar populations in the solar vicinity. Clues of a two-phase formation history of the Milky Way disk
• A dynamically young and perturbed Milky Way disk
• Basic physical parameters of a selected sample of evolved stars
• Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
• Chemodynamical evolution of the Milky Way disk I: The solar vicinity
• Vertical waves in the solar neighbourhood in Gaia DR2
• Simulations of Galaxy Formation in a Lambda CDM Universe I: Dynamical and Photometric Properties of a Simulated Disk Galaxy
• Detection of orbital motions near the last stable circular orbit of the massive black hole SgrA*
• Testing Scaling Relations for Solar-Like Oscillations from the Main Sequence to Red Giants using Kepler Data
• The Emergence of the Thick Disk in a CDM Universe
• A New Mechanism for Radial Migration in Galactic Disks: Spiral-Bar Resonance Overlap
• Secular Evolution in Disk Galaxies
• Asteroseismology of old open clusters with Kepler: direct estimate of the integrated RGB mass loss in NGC6791 and NGC6819
• Evidence for a systematic offset of -80 micro-arcseconds in the Gaia DR2 parallaxes
• Ensemble Asteroseismology of Solar-Type Stars with the NASA Kepler Mission
• The Second APOKASC Catalog: The Empirical Approach
• The Biggest Splash
• Strongly baryon-dominated disk galaxies at the peak of galaxy formation ten billion years ago
• Helium variation due to self-pollution among Globular Cluster stars: consequences on the horizontal branch morphology
• Calculating asteroseismic diagrams for solar-like oscillations
• The origin of accreted stellar halo populations in the Milky Way using APOGEE, $\text{Gaia}$, and the EAGLE simulations
• Inside Out and Upside Down: Tracing the Assembly of a Simulated Disk Galaxy Using Mono-Age Stellar Populations
• APOGEE Data Releases 13 and 14: Data and Analysis
• The birth of the Milky Way as uncovered by accurate stellar ages with Gaia
• The Close Binary Fraction of Solar-type Stars is Strongly Anti-correlated with Metallicity
• Chemodynamical evolution of the Milky Way disk II: Variations with Galactic radius and height above the disk plane
• Asteroseismology of 16000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii
• The underlying physical meaning of the ${\nu }_{\max }-{\nu }_{\mathrm{c}}$ relation
• On detecting the large separation in the autocorrelation of stellar oscillation times series
• The GALAH survey and Gaia DR2: dissecting the stellar disc's phase space by age, action, chemistry and location
• A First Constraint on the Thick Disk Scale Length: Differential Radial Abundances in K Giants at Galactocentric Radii 4, 8, and 12 kpc
• 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 $Gaia$
• Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant stars
• Distant future of the Sun and Earth revisited
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XVI. The helium abundance of multiple populations
• 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
• Spectroscopic determination of masses (and implied ages) for red giants
• Tracing chemical evolution over the extent of the Milky Way's Disk with APOGEE Red Clump Stars
• Stellar population synthesis based modelling of the Milky Way using asteroseismology of 13000 Kepler red giants
• Galactic Archaeology with asteroseismic ages: evidence for delayed gas infall in the formation of the Milky Way disc
• Testing the asteroseismic scaling relations for Red Giants with Eclipsing Binaries Observed by Kepler
• Young [$\alpha$/Fe]-enhanced stars discovered by CoRoT and APOGEE: What is their origin?
• Mixed modes in red-giant stars observed with CoRoT
• The age-metallicity structure of the Milky Way disk
• Bayesian distances and extinctions for giants observed by Kepler and APOGEE
• Period spacings in red giants II. Automated measurement
• Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. II. age dependencies and new insights
• Vertical distribution of Galactic disk stars IV - AMR and AVR from clump giants
• From the bulge to the outer disc: StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys
• The SDSS-III APOGEE Spectral Line List for H-band Spectroscopy
• Confirmation of the $Gaia$ DR2 parallax zero-point offset using asteroseismology and spectroscopy in the $Kepler$ field
• The impact of companions on stellar evolution
• Asteroseismology for "à la carte" stellar age-dating and weighing: Age and mass of the CoRoT exoplanet host HD 52265
• A secondary clump of red giant stars: why and where
• Core rotation braking on the red giant branch for various mass ranges
• The Open Cluster Chemical Abundances and Mapping Survey: IV. Abundances for 128 Open Clusters using SDSS/APOGEE DR16
• Asteroseismology of the open clusters NGC 6791, NGC 6811, and NGC 6819 from nineteen months of Kepler photometry
• Measuring Radial Orbit Migration in the Milky Way Disk
• Kinematics and chemical properties of the Galactic stellar populations. The HARPS FGK dwarfs sample
• Distances and parallax bias in Gaia DR2
• Oscillation frequencies for 35 \Kepler solar-type planet-hosting stars using Bayesian techniques and machine learning
• 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
• New H-band Stellar Spectral Libraries for the SDSS-III/APOGEE survey
• The primordial helium abundance from updated emissivities
• The total stellar halo mass of the Milky Way
• Stellar Multiplicity Meets Stellar Evolution And Metallicity: The APOGEE View
• Probing populations of red giants in the galactic disk with CoRoT
• Origin of chemically distinct discs in the Auriga cosmological simulations
• The Gaia-ESO Survey: the chemical structure of the Galactic discs from the first internal data release
• The Correlation Between Mixing Length and Metallicity on the Giant Branch: Implications for Ages in the Gaia Era
• Close Binary Companions to APOGEE DR16 Stars: 20,000 Binary-star Systems Across the Color-Magnitude Diagram
• Sausage & Mash: The dual origin of the Galactic thick disc and halo from the gas-rich Gaia-Enceladus-Sausage merger
• Stroemgren survey for Asteroseismology and Galactic Archaeology: let the SAGA begin
• The Helium abundance and Delta Y / Delta Z in Lower Main Sequence stars
• Re-visiting the relations: Galactic thin disc age-velocity dispersion relation
• The AMBRE Project: chemical evolution models for the Milky Way thick and thin discs
• NGC 6819: testing the asteroseismic mass scale, mass loss, and evidence for products of non-standard evolution
• Weighing the stellar constituents of the Galactic halo with APOGEE red giant stars
• An asteroseismic membership study of the red giants in three open clusters observed by Kepler: NGC6791, NGC6819, and NGC6811
• Dissecting simulated disc galaxies II: the age-velocity relation
• Galactic Archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE
• PLATO as it is: a legacy mission for Galactic archaeology
• The origin of diverse $\alpha$-element abundances in galaxy discs
• Keeping it Cool: Much Orbit Migration, yet Little Heating, in the Galactic Disk
• AIMS - A new tool for stellar parameter determinations using asteroseismic constraints
• Establishing the accuracy of asteroseismic mass and radius estimates of giant stars. I. Three eclipsing systems at [Fe/H]~ -0.3 and the need for a large high-precision sample
• The brightness of the Red Giant Branch tip: Theoretical framework, a set of reference models, and predicted observables
• Binary stars in the Galactic thick disc
• Cannibals in the thick disk: the young $\alpha -$rich stars as evolved blue stragglers
• Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. I. Measurements, methods, and first results
• Uncertainties on near-core mixing in red-clump stars: effects on the period spacing and on the luminosity of the AGB bump
• Imprints of radial migration on the Milky Way's metallicity distribution functions
• Significantly improving stellar mass and radius estimates: A new reference function for the Δν scaling relation
• Dissecting stellar chemical abundance space with t-SNE
• Seismic diagnostics of red giants: first comparison with stellar models
• The vertical motion history of disk stars throughout the Galaxy
• Spatial variations in the Milky Way disc metallicity-age relation
• Age-resolved chemistry of red giants in the solar neighbourhood
• Horizontal Branch evolution, metallicity and sdB stars
• Detection of solar-like oscillations in relics of the Milky Way: asteroseismology of K giants in M4 using data from the NASA K2 mission
• Fast estimation of orbital parameters in Milky-Way-like potentials
• Age dating of an early Milky Way merger via asteroseismology of the naked-eye star $\nu$ Indi
• The wide binary fraction of solar-type stars: emergence of metallicity dependence at a < 200 AU
• Quantifying stellar radial migration in an N-body simulation: blurring, churning, and the outer regions of galaxy discs
• The K2 M67 Study: Revisiting old friends with K2 reveals oscillating red giants in the open cluster M67
• Two chemically similar stellar overdensities on opposite sides of the plane of the Galaxy
• 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
• Analysis of old very metal rich stars in the solar neighbourhood
• A mass threshold for galactic gas discs by spin flips
• A New Method for the Asteroseismic Determination of the Evolutionary State of Red-Giant Stars
• Major mergers are not significant drivers of star formation or morphological transformation around the epoch of peak cosmic star formation
• Disk evolution since z=1 in a CDM Universe
• Asteroseismology of evolved stars to constrain the internal transport of angular momentum. I. Efficiency of transport during the subgiant phase
• New light on the Gaia DR2 parallax zero-point: influence of the asteroseismic approach, in and beyond the Kepler field
• GRACES observations of young [alpha/Fe]-rich stars
• The Gaia-ESO Survey: Insights on the inner-disc evolution from open clusters
• Testing asteroseismology with Gaia DR2: Hierarchical models of the Red Clump
• The Gaia DR2 parallax zero point: Hierarchical modeling of red clump stars
• Kepler red-clump stars in the field and in open clusters: constraints on core mixing
• The Red-Giant Branch Bump Revisited: Constraints on Envelope Overshooting in a Wide Range of Masses and Metallicities
• The cluster ages experiment (CASE). V. Analysis of three eclipsing binaries in the globular cluster M4
• MADE: A spectroscopic Mass, Age, and Distance Estimator for red giant stars with Bayesian machine learning
• OCCASO III. Iron peak and $\alpha$ elements of 18 open clusters. Comparison with chemical evolution models and field stars
• Testing Asteroseismic Scaling Relations using Eclipsing Binaries in Star Clusters and the Field
• Helium signature in red giant oscillation patterns observed by Kepler
• Cold accretion flows and chemical bimodality of the Milky Way galaxy
• Origin of $\alpha$-rich young stars: clues from C, N and O
• Effective temperatures of red giants in the APOKASC catalogue and the mixing length calibration in stellar models
• Differential population studies using asteroseismology: solar-like oscillating giants in CoRoT fields LRc01 and LRa01
• A comprehensive comparison between APOGEE and LAMOST: Radial Velocities and Atmospheric Stellar Parameters
• On the red giant branch mass loss in 47 Tucanae: Constraints from the horizontal branch morphology
• HD 89345: a bright oscillating star hosting a transiting warm Saturn-sized planet observed by K2
• Mean density inversions for red giants and red clump stars
• On the Impact of Helium Content on the RR Lyrae Distance Scale
• Insights from the APOKASC Determination of the Evolutionary State of Red-Giant Stars by consolidation of different methods
• Chemo-kinematics of the Milky Way from the SDSS-III MARVELS Survey
• An empirical mass-loss law for Population II giants from the Spitzer-IRAC survey of Galactic globular clusters
• The K2 M67 Study: An Evolved Blue Straggler in M67 from K2 Mission Asteroseismology
• Understanding the orbital periods of CEMP-s stars
• The Gaia-ESO Survey: Churning through the Milky Way
• The K2 Galactic Caps Project -- Going Beyond the \textit{Kepler} Field and Ageing the Galactic Disc
• The Helium Abundance of NGC 6791 from Modeling of Stellar Oscillations
• The Controversial Star-Formation History and Helium Enrichment of the Milky Way Bulge
• Investigating surface correction relations for RGB stars
• The Frequency of Field Blue-Straggler Stars in the Thick Disk and Halo System of the Galaxy
• Prospects for detecting asteroseismic binaries in Kepler data
• NGC 6791: a probable bulge cluster without multiple populations
• Characteristics of the two sequences seen in the high-velocity Hertzsprung-Russell diagram in Gaia DR2
• Timing the Evolution of the Galactic Disk with NGC 6791: An Open Cluster with Peculiar High-$\alpha$ Chemistry as seen by APOGEE
• Migration in the shearing sheet and estimates for young open cluster migration
• The blue straggler V106 in NGC6791: A prototype progenitor of old single giants masquerading as young
• Determining the Best Method of Calculating the Large Frequency Separation For Stellar Models
• NGC 6705 a young $\alpha$-enhanced Open Cluster from OCCASO data
• A Measurement of Diffusion in 47 Tucanae
• New insights in the origin and evolution of the old, metal-rich open cluster NGC 6791
• When do stars in 47 Tucanae lose their mass?
• The amplitude of solar p-mode oscillations from three-dimensional convection simulations
• Influence of metallicity on the near-surface effect on oscillation frequencies
• From K giants to G dwarfs: stellar lifetime effects on metallicity distributions derived from red giants
• Dynamical estimate of post main sequence stellar masses in 47 Tucanae
• Adiabatic solar-like oscillations in red giant stars
• He abundances in disc galaxies -- I. Predictions from cosmological chemodynamical simulations

Cited by in corpus (118)

• Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G=18.5
• Chronologically dating the early assembly of the Milky Way
• The Milky Way bar and bulge revealed by APOGEE DR16 and Gaia EDR3
• StarHorse results for spectroscopic surveys + Gaia DR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young-alpha rich stars
• Observationally driven Galactic double white dwarf population for LISA
• The GALAH Survey: Chemical tagging and chrono-chemodynamics of accreted halo stars with GALAH+ DR3 and $Gaia$ eDR3
• A Tale of Two Disks: Mapping the Milky Way with the Final Data Release of APOGEE
• APOKASC-3: The Third Joint Spectroscopic and Asteroseismic catalog for Evolved Stars in the Kepler Fields
• Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
• Unveiling the Distinct Formation Pathways of the Inner and Outer Discs of the Milky Way with Bayesian Machine Learning
• Abundance-age relations with red clump stars in open clusters
• Unveiling the time evolution of chemical abundances across the Milky Way disk with APOGEE
• How Many Elements Matter?
• Chasing the impact of the Gaia-Sausage-Enceladus merger on the formation of the Milky Way thick disc
• On the origin of the Galactic thin and thick discs, their abundance gradients and the diagnostic potential of their abundance ratios
• Prospects for Galactic and stellar astrophysics with asteroseismology of giant stars in the $TESS$ Continuous Viewing Zones and beyond
• Discovery of post-mass-transfer helium-burning red giants using asteroseismology
• The K2 Galactic Archaeology Program Data Release 3: Age-abundance patterns in C1-C8 and C10-C18
• Chemical Cartography with APOGEE: Mapping Disk Populations with a Two-Process Model and Residual Abundances
• LAMOST meets Gaia: The Galactic Open Clusters
• Constraining the solar neighbourhood age-metallicity relation from white dwarf-main sequence binaries
• Chronology of our Galaxy from Gaia Colour-Magnitude Diagram-fitting (ChronoGal). I. The formation and evolution of the thin disk from the Gaia Catalogue of Nearby Stars
• Radial structure and formation of the Milky Way disc
• A variational encoder-decoder approach to precise spectroscopic age estimation for large Galactic surveys
• Most "young" $\alpha$-rich stars have high masses but are actually old
• From giant clumps to clouds -- II. The emergence of thick disc kinematics from the conditions of star formation in high redshift gas rich galaxies
• A self-consistent dynamical model of the Milky Way disc adjusted to Gaia data
• Asteroseismology of the multiple stellar populations in the Globular Cluster M4
• Discovery of the local counterpart of disc galaxies at z > 4: The oldest thin disc of the Milky Way using Gaia-RVS
• Exploring the s-process history in the Galactic disk: Cerium abundances and gradients in Open Clusters from the OCCAM/APOGEE sample
• Cannibals in the thick disk II -- Radial-velocity monitoring of the young alpha-rich stars
• [Mg/Fe] ratios in the solar neighbourhood: stellar yields and chemical evolution scenarios
• The evolution of the Milky Way's thin disc radial metallicity gradient with K2 asteroseismic ages
• Deciphering the evolution of the Milky Way discs: Gaia APOGEE Kepler giant stars and the Besançon Galaxy Model
• Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE
• Timing the Milky Way bar formation and the accompanying radial migration episode
• Phase-space Properties and Chemistry of the Sagittarius Stellar Stream Down to the Extremely Metal-poor ($[Fe/H]\lesssim -3$) Regime
• Empirical Constraints on the Nucleosynthesis of Nitrogen
• Star Formation Timescales of the Halo Populations from Asteroseismology and Chemical Abundances
• Mapping radial abundance gradients with Gaia-ESO open clusters: Evidence of recent gas accretion in the Milky Way disk
• Nature vs. Nurture: Distinguishing Effects from Stellar Processing and Chemical Evolution on Carbon and Nitrogen in Red Giant Stars
• Hot Jupiters, cold kinematics: High phase space densities of host stars reflect an age bias
• Asteroseismology of overmassive, undermassive, and potential past members of the open cluster NGC6791
• An Intermediate-age Alpha-rich Galactic Population in K2
• HD-TESS: An Asteroseismic Catalog of Bright Red Giants within TESS Continuous Viewing Zones
• Observational Constraints of Radial Migration in the Galactic Disc Driven by the Slowing Bar
• The APO-K2 Catalog. II. Accurate Stellar Ages for Red Giant Branch Stars across the Milky Way
• Abundance analysis of APOGEE spectra for 58 metal-poor stars from the bulge spheroid
• Testing abundance-age relations beyond solar analogues with Kepler LEGACY stars
• Can ultralight dark matter explain the age-velocity dispersion relation of the Milky Way disc: A revised and improved treatment
• An asteroseismic age estimate of the open cluster NGC 6866 using Kepler and Gaia
• The Gaia-ESO Survey: Preparing the ground for 4MOST & WEAVE galactic surveys. Chemical evolution of lithium with machine learning
• Establishing the accuracy of asteroseismic mass and radius estimates of giant stars III. KIC4054905, an eclipsing binary with two 10 Gyr thick disk RGB stars
• The Gaia-ESO Survey: Chemical evolution of Mg and Al in the Milky Way with Machine-Learning
• Red Horizontal Branch stars: an asteroseismic perspective
• Trading oxygen for iron I: the [O/Fe] -- specific star formation rate relation of galaxies
• The Gaia-ESO Survey: Old super-metal-rich visitors from the inner Galaxy
• KIC 7955301: a hierarchical triple system with eclipse timing variations and an oscillating red giant
• A Unified Exploration of the Chronology of the Galaxy
• Evidence that Mass Loss on the Red Giant Branch Decreases with Metallicity
• Connecting integrated RGB mass loss from asteroseismology and globular clusters
• The effect of the adiabatic assumption on asteroseismic scaling relations for luminous red giants
• Time evolution of Ce as traced by APOGEE using giant stars observed with the Kepler, TESS and K2 missions
• Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant $\epsilon$ Tau
• Disk flaring with TNG50: diversity across Milky Way and M31 analogs
• Modeling Asteroseismic Yields for the Roman Galactic Bulge Time-Domain Survey
• Modelling chemical clocks -- Theoretical evidences of the space and time evolution of [s/alpha] in the Galactic disc with Gaia-ESO survey
• Investigating Gaia EDR3 parallax systematics using asteroseismology of Cool Giant Stars observed by Kepler, K2, and TESS I. Asteroseismic distances to 12,500 red-giant stars
• Double Red Giant Branch and Red Clump features of Galactic disc stellar populations with Gaia GSPspec
• Asteroseismic Study of Subgiants and Giants of the Open Cluster M67 using Kepler/K2: Expanded Sample and Precise Masses
• Red giants evolutionary status determination: the complete Kepler catalog
• 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
• Galactic disc heating by density granulation in fuzzy dark matter simulations
• Recent star formation episodes in the Galaxy: impact on its chemical properties and the evolution of its abundance gradient
• Establishing the accuracy of asteroseismic mass and radius estimates of giant stars. II. Revised stellar masses and radii for KIC 8430105
• Probing the strength of radial migration via churning by using metal-rich red giant stars from APOGEE
• Deciphering the Milky Way disc formation time encrypted in the bar chrono-kinematics
• Chemical abundances of the young inner-disk open cluster NGC 6705 observed by APOGEE: sodium-rich and not $\alpha$-enhanced
• Rediscovering the Milky Way with orbit superposition approach and APOGEE data II. Chrono-chemo-kinematics of the disc
• Chemodynamical Properties and Ages of Metal-Poor Stars in S-PLUS
• Chemodynamic evolution of Sun-like stars in nearby moving groups
• DUETS: Setting expectations for asteroseismic binaries and binary products with synthetic populations
• Anomalously low-mass core-He-burning star in NGC 6819 as a post-common-envelope phase product
• A catalogue of asteroseismically calibrated ages for APOGEE DR17. The predictions of a CatBoost machine learning model based on the [Mg/Ce] chemical clock and other stellar parameters
• Advancing accuracy in age determinations of old-disk stars using an oscillating red giant in an eclipsing binary
• Acoustic modes in M67 cluster stars trace deepening convective envelopes
• The Differential Assembly History of the Centers and Outskirts of Main Sequence Galaxies at $z\sim 2.3$
• A Galactic Self-Portrait: Density Structure and Integrated Properties of the Milky Way Disk
• Characterising the AGB bump and its potential to constrain mixing processes in stellar interiors
• Turbulent gas-rich discs at high redshift: origin of thick stellar discs through 3D 'baryon sloshing'
• Benchmarking the effective temperature scale of red giant branch stellar models: the case of the metal-poor halo giant HD 122563
• Asteroseismology with PBjam 2.0: measuring dipole mode frequencies in coupling regimes from main sequence to low-luminosity red giant stars
• Mixed-mode coupling in the Red Clump I. Standard single star models
• Stellar Migration and Chemical Enrichment in the Milky Way Disc: A Hybrid Model
• The neutron-capture and alpha-elements abundance ratios scatter in old stellar populations. Cosmological simulations of the stellar halo
• The Milky Way in context: The formation of galactic discs and chemical sequences from a cosmological perspective
• Populations of ultraluminous X-ray sources in galaxies: origin and evolution
• Rubidium abundances in solar metallicity stars
• Residual eccentricity of an Earth-like planet orbiting a red giant Sun
• Distinguishing super-Nyquist frequencies via their temporal variation in $\gamma$ Doradus stars from continuous photometry
• The oldest Milky Way stars: New constraints on the age of the Universe and the Hubble constant
• Inferring the efficiency of convective-envelope overshooting in Red Giant Branch stars
• Dissecting stellar populations with manifold learning I. Validation of the method on a synthetic Milky Way-like galaxy
• The Spheroidal Bulge of the Milky Way: Chemodynamically Distinct from the Inner-Thick Disc and Bar
• First direct detection of an RR Lyrae star conclusively associated with an intermediate-age cluster
• Quantifying chemical and kinematical properties of Galactic disks
• Not all nitrogen-rich field stars originate from globular clusters
• Asteroseismic analysis of red giants in eclipsing binaries using two methods: implications for scaling relations and chemical composition
• Towards Accurate Asteroseismic Masses for Luminous Giants
• The odd bunch: chrono-chemo-dynamics of sixteen unusual stars from Kepler
• Attempting an accurate age estimate of the open cluster NGC 6633 using CoRoT and Gaia
• Two sequences in the age-metallicity relation as seen from [C/N] abundances in APOGEE
• A large sub-Neptune transiting the thick-disk M4V TOI-2406
• A 'Quick Look' at All-Sky Galactic Archeology with TESS: 158,000 Oscillating Red Giants from the MIT Quick-Look Pipeline
• Neutron-capture elements record the ordered chemical evolution of the disc over time
• 3D elemental abundances of stars at formation across the histories of Milky Way-mass galaxies in the FIRE simulations
• The vertical structure of the stellar disk in NGC 551
• Physical interpretation of the oscillation spectrum on the RGB and AGB