Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood

Abstract

ABRIDGED: METHODS: We have conducted a high-resolution spectroscopic study of 714 F and G dwarf and subgiant stars in the Solar neighbourhood. The star sample has been kinematically selected to trace the Galactic thin and thick disks to their extremes...... The determination of stellar parameters and elemental abundances is based on a standard 1-D LTE analysis using equivalent width measurements in high-resolution (R=40000-110000) and high signal-to-noise (S/N=150-300) spectra obtained with..... RESULTS: .... Our data show that there is an old and alpha-enhanced disk population, and a younger and less alpha-enhanced disk population. While they overlap greatly in metallicity between -0.7<[Fe/H]<+0.1, they show a bimodal distribution in [alpha/Fe]. This bimodality becomes even clearer if stars where stellar parameters and abundances show larger uncertainties (Teff<5400 K) are discarded, showing that it is important to constrain the data set to a narrow range in the stellar parameters if small differences between stellar populations are to be revealed. We furthermore find that the alpha-enhanced population has orbital parameters placing the stellar birthplaces in the inner Galactic disk while the low-alpha stars mainly come from the outer Galactic disk........... We furthermore have discovered that a standard 1-D, LTE analysis, utilising ionisation and excitation balance of Fe I and Fe II lines produces a flat lower main sequence. As the exact cause for this effect is unclear we chose to apply an empirical correction. Turn-off, and more evolved, stars, appears to be un-affected.

28 pages, accepted for publication in Astronomy and Astrophysics, this version includes 11 more stars and has been modified after referee's comments

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• The Abundances of Light Neutron-Capture Elements in Planetary Nebulae III. The Impact of New Atomic Data on Nebular Selenium and Krypton Abundance Determinations
• The Gaia-ESO Survey: Churning through the Milky Way
• NGTS-10b: The shortest period hot Jupiter yet discovered
• Elemental Abundances of M Dwarfs Based on High-Resolution Near-Infrared Spectra: Verification by Binary Systems
• The Pristine survey XIII: Uncovering the very metal-poor tail of the thin disc
• From giant clumps to clouds -- II. The emergence of thick disc kinematics from the conditions of star formation in high redshift gas rich galaxies
• Most "young" $\alpha$-rich stars have high masses but are actually old
• Origin of large meteoritic SiC stardust grains in metal-rich AGB stars
• Blind chemical tagging with DBSCAN: prospects for spectroscopic surveys
• Detailed abundance analysis of globular clusters in the Local Group: NGC 147, NGC 6822, and Messier 33
• LHS 1815b: The First Thick-Disk Planet Detected By TESS
• Planets Across Space and Time (PAST). V. The evolution of hot Jupiters revealed by the age distribution of their host stars
• Precision angular diameters for 16 southern stars with VLTI/PIONIER
• Star formation history of the solar neighbourhood as told by Gaia
• The SAMI Galaxy Survey: Mass and Environment as Independent Drivers of Galaxy Dynamics
• Abundances of disk and bulge giants from hi-res optical spectra: II. O, Mg, Ca, and Ti in the bulge sample
• At least one in a dozen stars exhibits evidence of planetary ingestion
• Abundance trend with condensation temperature for stars with different Galactic birth places
• Local RR Lyrae Stars: native and alien
• The G+M eclipsing binary V530 Orionis: A stringent test of magnetic stellar evolution models for low-mass stars
• Behaviour of elements from lithium to europium in stars with and without planets
• The K2 Galactic Caps Project -- Going Beyond the \textit{Kepler} Field and Ageing the Galactic Disc
• Planets Across Space and Time (PAST). III. Morphology of the Planetary Radius Valley as a Function of Stellar Age and Metallicity in the Galactic Context Revealed by the LAMOST-Gaia-Kepler Sample
• Mass and Metallicity Requirement in Stellar Models for Galactic Chemical Evolution Applications
• The Gaia-ESO Survey: Carbon abundance in the Galactic thin and thick disks
• Exoplanets in the Galactic context: Planet occurrence rates in the thin disk, thick disk and stellar halo of Kepler stars
• Exploring the s-process history in the Galactic disk: Cerium abundances and gradients in Open Clusters from the OCCAM/APOGEE sample
• Non-LTE abundances of zinc in different spectral type stars and the Galactic [Zn/Fe] trend based on quantum-mechanical data on inelastic processes in zinc-hydrogen collisions
• The RAdial Velocity Experiment (RAVE): Parameterisation of RAVE spectra based on convolutional neural networks
• Wolf 1130: A Nearby Triple System Containing a Cool, Ultramassive White Dwarf
• The Metallicity Dependence of Giant Planet Incidence
• A Reanalysis of the Fundamental Parameters and Age of TRAPPIST-1
• The Impact of Black Hole Formation on Population Averaged Supernova Yields
• Observing the metal-poor solar neighbourhood: a comparison of galactic chemical evolution predictions
• Chemical Abundances in a Sample of Red Giants in the Open Cluster NGC 2420 from APOGEE
• Chemical analysis of CH stars - III: Atmospheric parameters and elemental abundances
• Detailed chemical composition and orbit of the new globular cluster FSR1758: Implications for the accretion of the Sequoia dwarf galaxy onto the Milky Way
• Chemical inhomogeneities in the Pleiades: signatures of rocky-forming material in stellar atmospheres
• Milky Way's Thick and Thin disk: Is there distinct thick disk?
• Some Stars are Totally Metal: A New Mechanism Driving Dust Across Star-Forming Clouds, and Consequences for Planets, Stars, and Galaxies
• Tess asteroseismology of the known planet host star ${\lambda }^2$ Fornacis
• Stars stripped in binaries -- the living gravitational wave sources
• Cosmic nucleosynthesis: a multi-messenger challenge
• The Gaia-ESO Survey: the inner disk, intermediate-age open cluster Trumpler 23
• The chemical abundance pattern of the extremely metal-poor thin disk star 2MASS J1808-5104 and its origins
• Deciphering the evolution of the Milky Way discs: Gaia APOGEE Kepler giant stars and the Besançon Galaxy Model
• The Enigmatic Brown Dwarf WISEA J153429.75-104303.3 (aka "The Accident")
• Understanding the evolution and dust formation of carbon stars in the LMC with a look at the JWST
• Detailed elemental abundances of binary stars: Searching for signatures of planet formation and atomic diffusion
• NGC 6791: a probable bulge cluster without multiple populations
• Discovery of an activity cycle in the solar-analog HD 45184. Exploring Balmer and metallic lines as activity proxy candidates
• Know thy star, know thy planet: Chemo-kinematically characterizing TESS targets
• Elemental abundances of nearby M dwarfs based on high-resolution near-infrared spectra obtained by the Subaru/IRD survey: Proof of concept
• The chemical DNA of the Magellanic Clouds -- I. The chemical composition of 206 Small Magellanic Cloud red giant stars
• TOI-1231 b: A Temperate, Neptune-Sized Planet Transiting the Nearby M3 Dwarf NLTT 24399
• Stellar ages and masses in the solar neighbourhood: Bayesian analysis using spectroscopy and Gaia DR1 parallaxes
• The metal rich abundance pattern - spectroscopic properties and abundances for 107 main-sequence stars
• sMILES SSPs: A Library of Semi-Empirical MILES Stellar Population Models with Variable [$\alpha$/Fe] Abundances
• Optimized modeling of Gaia-Hipparcos astrometry for the detection of the smallest cold Jupiter and confirmation of seven low mass companions
• The Fe/Ni ratio in ionized nebulae: clues on dust depletion patterns
• Kinematic structures of the Solar neighbourhood revealed by Gaia DR1/TGAS and RAVE
• APOGEE chemical tagging constraint on the maximum star cluster mass in the $\alpha$-enhanced Galactic disk
• NIRPS joining HARPS at ESO 3.6 m. On-sky performance and science objectives
• Revised age for CM Draconis and WD 1633+572: Toward a resolution of model-observation radius discrepancies
• Timing the Evolution of the Galactic Disk with NGC 6791: An Open Cluster with Peculiar High-$\alpha$ Chemistry as seen by APOGEE
• Oxygen and zinc abundances in 417 Galactic bulge red giants
• TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf
• Local stellar formation history from the 40 pc white dwarf sample
• Elemental Abundances in M31: Alpha and Iron Element Abundances from Low-Resolution Resolved Stellar Spectroscopy in the Stellar Halo
• Serendipitous discovery of the faint solar twin Inti 1
• Chemo-kinematic ages of eccentric-planet-hosting M dwarf stars
• Kepler-11 is a Solar Twin: Revising the Masses and Radii of Benchmark Planets Via Precise Stellar Characterization
• Phosphorus Abundances in FGK Stars
• The impact of very massive stars on the chemical evolution of extremely metal-poor galaxies
• Combined APOGEE-GALAH stellar catalogues using the Cannon
• Metallicity distributions of halo stars: do they trace the Galactic accretion history?
• Local associations and the barium puzzle
• sMILES: A Library of Semi-Empirical MILES Stellar Spectra with Variable [$\alpha$/Fe] Abundances
• Targeting Bright Metal-poor Stars in the Disk and Halo Systems of the Galaxy
• Phase-space Properties and Chemistry of the Sagittarius Stellar Stream Down to the Extremely Metal-poor ($[Fe/H]\lesssim -3$) Regime
• The mass determination of TOI-519 b: a close-in giant planet transiting a metal-rich mid-M dwarf
• Characterizing the companion AGBs using surface chemical composition of barium stars
• The GAPS Programme at TNG -- XXV. Stellar atmospheric parameters and chemical composition through GIARPS optical and near-infrared spectra
• Orbital and spectral analysis of the benchmark brown dwarf HD 4747B
• TOI-1728b: The Habitable-zone Planet Finder confirms a warm super Neptune orbiting an M dwarf host
• The velocity ellipsoid in the Galactic disc using Gaia DR1
• On the effects of the Initial Mass Function on Galactic chemical enrichment
• TOI-532b: The Habitable-zone Planet Finder confirms a Large Super Neptune in the Neptune Desert orbiting a metal-rich M dwarf host
• The Rotation-Metallicity Relation for the Galactic Disk as Measured in the Gaia DR1 TGAS and APOGEE Data
• Residual Abundances in GALAH DR3: Implications for Nucleosynthesis and Identification of Unique Stellar Populations
• The CARMENES search for exoplanets around M dwarfs: Not-so-fine hyperfine-split vanadium lines in cool star spectra
• Small Planets in the Galactic Context: Host Star Kinematics, Iron, and $\alpha$ Element Enhancement
• Metallicity calibrations for dwarf stars and giants in the Geneva photometric system
• Accelerated Fitting of Stellar Spectra
• Variations in $\alpha$-element ratios trace the chemical evolution of the disk
• Occurrence rates of small planets from HARPS: Focus on the Galactic context
• The GALAH Survey: Temporal Chemical Enrichment of the Galactic Disk
• The chemical composition of $\alpha$ Cen AB revisited
• Influence of inelastic collisions with hydrogen atoms on the non-LTE line formation for Fe I and Fe II in the 1D model atmospheres of late-type stars
• CKS IX: Revisiting the Minimum-Mass Extrasolar Nebula with Precise Stellar Parameters
• Hot Jupiters, cold kinematics: High phase space densities of host stars reflect an age bias
• How the origin of stars in the Galaxy impacts the composition of planetary building blocks
• Planet formation throughout the Milky Way: Planet populations in the context of Galactic chemical evolution
• Milky Way archaeology using RR Lyrae and type II Cepheids II. High velocity RR Lyrae stars, and mass of the Milky Way
• Observational constraints on the origin of the elements. V. Non-LTE abundance ratios of [Ni/Fe] in Galactic stars and enrichment by sub-Chandrasekhar mass SNe
• The AMBRE Project: Spectrum normalisation influence on Mg abundances in the metal-rich Galactic disc
• Constraining $\nu$-Process Production of Fluorine through Cosmic Ray Nucleosynthesis
• Chemical Properties of the Local Galactic Disk and Halo. I. Fundamental Properties of 1,544 Nearby, High Proper-Motion M dwarfs and subdwarfs
• Observing multiple populations in globular clusters with the ESO archive: NGC 6388 reloaded
• NGC 6705 a young $\alpha$-enhanced Open Cluster from OCCASO data
• The Pristine survey -- XV. A CFHT ESPaDOnS view on the Milky Way halo and disc populations
• Gliese 12 b: A temperate Earth-sized planet at 12 pc ideal for atmospheric transmission spectroscopy
• Gaia18aen: First symbiotic star discovered by Gaia
• The Chemical Nature of the Young 120-Myr-old Nearby Pisces-Eridanus Stellar Stream Flowing through the Galactic Disk
• HD 179821 (V1427 Aql, IRAS 19114+0002) -- A Massive Post-Red Supergiant Star?
• Modelling the Milky Way. I -- Method and first results fitting the thick disk and halo with DES-Y3 data
• Masses, Oxygen and Carbon abundances in CHEPS dwarf stars
• The chemical connection between damped Lyman-α systems and Local Group dwarf galaxies
• The detailed chemical composition of the terrestrial planet host Kepler-10
• Chemically peculiar A and F stars with enhanced s-process and iron-peak elements: stellar radiative acceleration at work
• MINCE I. Presentation of the project and of the first year sample
• Abundance analysis of a CEMP-no star in the Carina dwarf spheroidal galaxy
• The AMBRE Project: Solar neighbourhood chemodynamical constraints on Galactic disc evolution
• The Galactic Distribution of Phosphorus: A Survey of 163 Disk and Halo Stars
• Optical high-resolution spectroscopy of 14 young $\alpha$-rich stars
• The homogeneous characterisation of Ariel host stars
• Relationship between the Elemental Abundances and the Kinematics of Galactic-Field RR Lyrae Stars
• High-precision abundances of first population stars in NGC 2808: confirmation of a metallicity spread
• The metal-rich halo component extended in z: a characterization with Gaia DR2 and APOGEE
• Excess of Ca (and Sc) produced in globular cluster multiple populations: a first census in 77 Galactic globular clusters
• Chemical Composition Of Bright Stars In The Northern Hemisphere: Star-Planet Connection
• The GALAH survey: Tracing the Milky Way's formation and evolution through RR Lyrae stars
• Systematic investigation of chemical abundances derived using IR spectra obtained with GIANO
• Universal properties of the high- and low-α disk: small intrinsic abundance scatter and migrating stars
• On the Flaring of Thick Disc of Galaxies: Insights from Simulations
• Phosphorus Abundances in the Hyades and Galactic Disk
• The structure of the Milky Way based on unWISE 3.4$\mu$m integrated photometry
• Extremely metal-poor stars in the Fornax and Carina dwarf spheroidal galaxies
• Young giants of intermediate mass Evidence of rotation and mixing
• A simple and general method for solving detailed chemical evolution with delayed production of iron and other chemical elements
• Characterising brown dwarf companions with IRDIS long-slit spectroscopy: HD 1160 B and HD 19467 B
• Photometric metallicity for 694233 Galactic giant stars from Gaia DR3 synthetic Stromgren photometry. Metallicity distribution functions of halo sub-structures
• Metallicity Distribution of Disk Stars and the Formation History of the Milky Way
• Quest for finding the lost siblings of the Sun
• On the iron ionization balance of cool stars
• Titanium abundances in late-type stars I. 1D non-local thermodynamic equilibrium modelling in benchmark dwarfs and giants
• NIR spectroscopy of the Sun and HD20010 - Compiling a new linelist in the NIR
• The Gaia-ESO Survey: Oxygen abundance in the Galactic thin and thick disks
• High- and Low-$\alpha$ Disk Stars Separate Dynamically at all Ages
• Chemical Composition of Bright Stars in the Continuous Viewing Zone of the TESS Space Mission
• Testing abundance-age relations beyond solar analogues with Kepler LEGACY stars
• Stellar atmospheric parameters of FGK-type stars from high-resolution optical and near-infrared CARMENES spectra
• Chemical compositions and kinematics of the Hercules stream
• Metal enrichment in a semi-analytical model, fundamental scaling relations, and the case of Milky Way galaxies
• Radial migration and vertical action in N-body simulations
• The HD 93963 A transiting system: A 1.04d super-Earth and a 3.65 d sub-Neptune discovered by TESS and CHEOPS
• Abundances of alpha-Process Elements in Thin-Disk, Thick-Disk, and Halo Stars of the Galaxy: Non-LTE Analysis
• Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VII. Lithium
• NGC 1261: an $r$-process enhanced globular cluster from the Gaia-Enceladus event
• A Mini-Neptune Orbiting the Metal-poor K Dwarf BD+29 2654
• Spectroscopic Survey of G and K Dwarfs in the Hipparcos Catalog. I. Comparison between the Hipparcos and Photometric Parallaxes
• The GALAH survey: Co-orbiting stars and chemical tagging
• TOI-1075 b: A Dense, Massive, Ultra-Short Period Hot Super-Earth Straddling the Radius Gap
• Disentangling the Arcturus stream
• Probing the early Milky Way with GHOST spectra of an extremely metal-poor star in the Galactic disk
• The LHS 1678 System: Two Earth-Sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc
• NLTE Analysis of High Resolution H-band Spectra. II. Neutral Magnesium
• Three Moving Groups Detected in the LAMOST DR1 Archive
• Analytic solution of Chemical Evolution Models with Type Ia SNe
• Stragglers of the thick disc
• Galactic structure in the outer disk: the field in the line of sight to the intermediate-age open cluster Tombaugh 1
• The AMBRE Project: searching for the closest solar siblings
• Self-similarity in the chemical evolution of galaxies and the delay time distribution of SNe Ia
• Cardinal kinematics: I. Rotation fields of the APOGEE Survey
• The [Y/Mg] chemical clock in the Galactic Disk: The influence of metallicity and Galactic population in the solar neighbourhood
• Identification of Absorption Lines of Heavy Metals in the Wavelength Range 0.97--1.32 Micron
• A massive hot Jupiter orbiting a metal-rich early-M star discovered in the TESS full frame images
• MgII 2797, 2803 emission in a large sample of low-metallicity star-forming galaxies from SDSS DR14
• HERBS II: Detailed chemical compositions of Galactic bulge stars
• Galactic Chemical Evolution Models Favor an Extended Type Ia Supernova Delay-Time Distribution
• Chemical composition of evolved stars in the young open clusters NGC 4609 and NGC 5316
• Accurate effective temperature from H$\alpha$ profiles
• Exploring the Galactic Anticenter substructure with LAMOST & Gaia DR2
• The peculiar chemical pattern of the WASP-160 binary system: signatures of planetary formation and evolution?
• Two Massive Jupiters in Eccentric Orbits from the TESS Full Frame Images
• Trading oxygen for iron I: the [O/Fe] -- specific star formation rate relation of galaxies
• On the metal-poor edge of the Milky Way "thin disc"
• The hELENa project - II. Abundance distribution trends of early-type galaxies: from dwarfs to giants
• The M dwarf problem: Fe and Ti abundances in a volume-limited sample of M dwarf stars
• Detailed chemical abundance analysis of the thick disk star cluster Gaia 1
• Constraining the final fates of massive stars by oxygen and iron enrichment history in the Galaxy
• Spectroscopic study of the elusive globular cluster ESO452-SC11 and its surroundings
• Ultra-deep Imaging: Structure of Disks and Haloes
• The chemical evolution of the solar neighbourhood for planet-hosting stars
• Updated properties of the old open cluster Melotte 66: Searching for multiple stellar populations
• Chemistry of multiple stellar populations in the mono-metallic, in situ, bulge globular cluster NGC 6388
• Spectroscopy of Dwarf Stars Around the North Celestial Pole
• A new algorithm for optimizing the wavelength coverage for spectroscopic studies: Spectral Wavelength Optimization Code (SWOC)
• Exoplanets Across Galactic Stellar Populations with PLATO: Estimating Exoplanet Yields Around FGK Stars for the Thin Disk, Thick Disk and Stellar Halo
• The first heavy-metal hot subdwarf composite binary SB 744
• Influence of Inelastic Collisions with Hydrogen Atoms on Non-LTE Oxygen Abundance Determination in the Sun and late-type stars
• High-speed stars. II. An unbound star, young stars, bulge metal-poor stars, and Aurora candidates
• Investigating the amplitude and rotation of the phase spiral in the Milky Way outer disc
• Kinematics of the Galactic disk from LAMOST Dwarf sample
• The Parent Populations of 6 groups identified from Chemical Tagging in the Solar neighborhood
• On the likelihoods of finding very metal-poor (and old) stars in the Milky Way's disc, bulge, and halo
• Three new barium dwarfs with WD companions: BD+68 1027, RE J0702+129 and BD+80 670
• Stellar population astrophysics (SPA) with the TNG -- The Arcturus Lab
• The Gaia-ESO survey: placing constraints on the origin of r-process elements
• Metallicity Gradient of the Thick Disc Progenitor at High Redshift
• Orbital and atmospheric parameters of two wide O-type subdwarf binaries: BD$-$11${}^{\mathrm{o}}$162 and Feige 80
• Detailed $\alpha$ abundance trends in the inner Galactic bulge
• Composite Stellar Populations and Element by Element Abundances in the Milky Way Bulge and Elliptical Galaxies
• Planetary mass-radius relations across the galaxy
• High Resolution Spectroscopic Abundances of Red Giant Branch Stars in NGC 6681
• A collage of small planets from the Lick Carnegie Exoplanet Survey : Exploring the super-Earth and sub-Neptune mass regime
• Exclusion of Stellar Companions to Exoplanet Host Stars
• Stars in the Local Galactic Thick Disk and Halo in Gaia EDR3: A catalogue of Half a Million Local Main-sequence Stars with Photometric Metallicities
• Asymmetric metallicity patterns in the stellar velocity space with RAVE
• TOI-5344 b: A Saturn-like planet orbiting a super-Solar metallicity M0 dwarf
• Sun-like stars unlike the Sun: Clues for chemical anomalies of cool stars
• The Local Group Symbiotic Star Population and its Tenuous Link with Type Ia Supernovae
• Insights into the Formation and Evolution History of the Galactic Disk System
• Evolution of the radial ISM metallicity gradient in the Milky Way disk since redshift $\approx 3$
• Disk flaring with TNG50: diversity across Milky Way and M31 analogs
• Galactic Pal-eontology: Abundance Analysis of the Disrupting Globular Cluster Palomar 5
• Metallicity Calibration and Photometric Parallax Estimation: I. UBV photometry
• Extended transition rates and lifetimes in Al I and Al II from systematic multiconfiguration calculations
• Chemical Cartography with APOGEE: Two-process Parameters and Residual Abundances for 288,789 Stars from Data Release 17
• Silicate Precursor Silane detected in Cold Low-Metallicity Brown Dwarf
• Kinematically Detected Halo Streams
• GalCEM I -- An Open-Source Detailed Isotopic Chemical Evolution Code
• Frequencies, chaos and resonances: a study of orbital parameters of nearby thick disc and halo stars
• An outer shade of Pal: Abundance analysis of the outer halo globular cluster Palomar 13
• On the Origin of Metal-poor Stars in the Solar Neighborhood
• The Chemical Evolution of Iron-Peak Elements with Hypernovae
• A hot Mars-sized exoplanet transiting an M dwarf
• Exploring the Evolution of Massive Clumps in Simulations that Reproduce the Observed Milky Way α-element Abundance Bimodality
• Characterising abundance-age relations of GALAH stars using oxygen-enhanced stellar models
• Clustering in the Stellar Abundances Space
• Bayesian Cross-Matching of High Proper Motion Stars in Gaia DR2 and Photometric Metallicities for $\sim$1.7 million K and M Dwarfs
• The chemical enrichment of the Milky Way disk evaluated using conditional abundances
• Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VIII. Carbon and oxygen
• Prospecting for chemical tags among open clusters
• Explosive nucleosynthesis of a metal-deficient star as the source of a distinct odd-even effect in the solar twin HIP 11915
• Metallicity-Suppressed Collapsars Cannot be the Dominant r-Process Source in the Milky Way
• The first comprehensive Milky Way stellar mock catalogue for the Chinese Space Station Telescope Survey Camera
• Palladium and silver abundances in stars with [Fe/H] > -2.6
• Wide binaries from the H3 survey: the thick disk and halo have similar wide binary fractions
• Near-infrared chemical abundances of stars in the Sculptor dwarf galaxy
• CLUES about M33: the reversed radial stellar age gradient in the outskirts of Triangulum galaxy
• SDSS J102915.14+172927.9: Revisiting the chemical pattern
• A Spectroscopic Survey of Field Red Horizontal-Branch Stars
• He abundances in disc galaxies -- I. Predictions from cosmological chemodynamical simulations
• The in situ origin of the globular cluster NGC 6388 from abundances of Sc, V, and Zn of a large sample of stars
• Populating The Milky Way: Characterising Planet Demographics by Combining Galaxy Formation Simulations and Planet Population Synthesis Models
• Observational constraints on the origin of the elements. IX. 3D NLTE abundances of metals in the context of Galactic Chemical Evolution Models and 4MOST
• The Kepler Smear Campaign: Light curves for 102 Very Bright Stars
• Discovery of a resolved white dwarf-brown dwarf binary with a small projected separation: SDSS J222551.65+001637.7AB
• Planets Across Space and Time (PAST). VI. Age Dependence of the Occurrence and Architecture of Ultra-Short-Period Planet Systems
• Beyond the Coronal Graveyard
• Galactic chemical evolution]{Galactic chemical evolution of the solar neighborhood, solar twins and exoplanet indicators
• Chemical abundance analysis of symbiotic giants. Metallicity and CNO abundance patterns in 14 northern S-type systems
• r-Process enrichment in the Galactic halo characterized by nucleosynthesis variation in the ejecta of coalescing neutron star binaries
• The McDonald Accelerating Stars Survey (MASS): Architecture of the Ancient Five-Planet Host System Kepler-444
• Tracing the Origin of Moving Groups. III. Detecting Moving Groups in The LAMOST DR7
• Untangling the Sources of Abundance Dispersion in Low-Metallicity Stars
• Chemical Compositions of Red Giant Stars from Habitable Zone Planet Finder Spectroscopy
• Revising Properties of Planet-host Binary Systems I.: Methods and Pilot Study
• Derivation of parameters for 3748 FGK stars using H-band spectra from APOGEE Data Release 14
• Characterization of Exoplanet-Host Stars
• More pieces of the puzzle: Chemistry and substructures in the Galactic thick disk
• New Teff and [Fe/H] spectroscopic calibration for FGK dwarfs and GK giants
• The Peculiar Globular Cluster Palomar 1 and Persistence in the SDSS-APOGEE Database
• Probing 3D and NLTE models using APOGEE observations of globular cluster stars
• Globular Clusters Lost by the Sagittarius Dwarf Spheroidal Galaxy
• Characterisation of TOI-406 as showcase of the THIRSTEE program: A 2-planet system straddling the M-dwarf density gap
• Neutrino-driven Core-collapse Supernova Yields in Galactic Chemical Evolution
• Fine Structure of the Age-Chromospheric Activity Relation in Solar-Type Stars: II. H$\alpha$ Line
• Chemical Tagging N-rich Field Stars with High-resolution Spectroscopy
• A Monte Carlo based simulation of the galactic chemical evolution of the Milky Way galaxy
• A chemical and kinematical analysis of the intermediate-age open cluster IC 166 from APOGEE and Gaia DR2
• The Density Profile and Kinematics of the Milky Way with RR Lyrae Stars
• Determination of robust metallicities for metal-rich red giant branch stars
• The kinematics of the nebular shells around low mass progenitors of PNe with low metallicity
• Stellar substructures in the solar neighbourhood. III. Kinematic group 2 in the Geneva-Copenhagen survey
• $\pi$ Earth: a 3.14-day Earth-sized Planet from $\text{K2}$'s Kitchen Served Warm by the SPECULOOS Team
• The GALAH Survey: Stellar parameters and abundances for 800,000 Gaia RVS spectra using GALAH DR4 and The Cannon
• Rediscovering the Milky Way with orbit superposition approach and APOGEE data II. Chrono-chemo-kinematics of the disc
• Stellar substructures in the solar neighbourhood IV. Kinematic Group 1 in the Geneva-Copenhagen survey
• Discovery of an Extremely r-process-enhanced Thin-disk Star with [Eu/H] = +0.78
• Insights into the properties of the Local (Orion) spiral arm. NGC 2302: First results and description of the program
• On the validity of the spectroscopic age indicators [Y/Mg], [Y/Al], [Y/Si], [Y/Ca], and [Y/Ti] for giant stars
• Measuring the alpha-abundance of subsolar-metallicity stars in the Milky Way's central half-parsec: testing globular cluster and dwarf galaxy infall scenarios
• An observational testbed for cosmological zoom-in simulations: constraining stellar migration in the solar cylinder using asteroseismology
• HD 183579b: A Warm Sub-Neptune Transiting a Solar Twin Detected by TESS
• The Galactic Chemical Evolution of Chlorine
• Limitations and rotation of the two-armed phase spiral in the Milky Way stellar disc
• Chemical abundances of the young inner-disk open cluster NGC 6705 observed by APOGEE: sodium-rich and not $\alpha$-enhanced
• High-Resolution Chemical Abundances of the Nyx Stream
• Stellar atmospheric parameters and chemical abundances of about 5 million stars from S-PLUS multi-band photometry
• Chromium Nucleosynthesis and Silicon-Carbon Shell Mergers in Massive Stars
• On the manifest link between Terzan 5 and the Galactic bulge
• The tilt of the velocity ellipsoid of different Galactic disk populations
• Metallicity Calibration and Photometric Parallax Estimation: II. SDSS photometry
• The Radial Distribution of Mono-Metallicity Populations in the Galactic Disk as Evidence for Two-Phase Disk Formation
• The Initial Mass Function and Other Stellar Properties Across the Core of the Hydra I Cluster
• Chemical abundances of Young Massive Clusters in NGC 1313
• A free-floating-planet microlensing event caused by a Saturn-mass object
• The GALAH Survey: Improving our understanding of confirmed and candidate planetary systems with large stellar surveys
• The distribution, kinematics and luminosities of extreme helium stars as probes of their origin and evolution
• Chemical composition of planetary hosts: C, N, and $\alpha$-element abundances
• New stellar age estimates using SPInS based on Gaia DR3 photometry and LAMOST DR8 abundances
• Two neighbours of the ultra-short-period Earth-sized planet K2-157 b in the warm Neptunian savanna
• Chemodynamics of metal-poor wide binaries in the Galactic halo: Association with the Sequoia event
• Dynamical Origin for the Collinder 132-Gulliver 21 Stream: A Mixture of three Co-Moving Populations with an Age Difference of 250 Myr
• A Spectroscopic Analysis of a Sample of K2 Planet-Host Stars: Stellar Parameters, Metallicities and Planetary Radii
• Atmospheric heating and magnetism driven by ${}^{22}$Ne distillation in isolated white dwarfs
• MINCE III. Detailed chemical analysis of the UVES sample
• MagAO Imaging of Long-period Objects (MILO). II. A Puzzling White Dwarf around the Sun-like Star HD 11112
• CEMPlifying reionization
• Discovery and characterization of a dense sub-Saturn TOI-6651b
• Dancing with invisible partners: Three-body exchanges with primordial black holes
• Triangulum-Andromeda overdensity: a region with a complex stellar population
• Chemical composition of the outer halo globular cluster Palomar 15
• CO radial gradients in the bulge of M31
• Planet Across Space and Time (PAST). VII. The origin and tidal evolution of hot Jupiters constrained by a broken age-frequency relation
• Chemical characterisation of the X-shooter Spectral Library (XSL): [Mg/Fe] and [Ca/Fe] abundances
• Two substellar survivor candidates; one found and one missing
• NIRPS and TESS reveal a peculiar system around the M dwarf TOI-756: A transiting sub-Neptune and a cold eccentric giant
• Tracing the origin of moving groups I. The γ Leo moving group with high resolution spectra from the Subaru Telescope
• Through Thick and Thin: The Cosmic Evolution of Disk Scale Height
• Correlating Intrinsic Stellar Parameters with Mg II Self-Reversal Depths
• Abundances in Galactic Bulge planetary nebulae from optical, ultraviolet and infrared observations
• The bi-modal ${}^7$Li distribution of the Milky Way's thin-disk dwarf stars: The role of Galactic-scale events and stellar evolution
• NGTS-EB-7, an eccentric, long-period, low-mass eclipsing binary
• The nature of the KFR08 stellar stream
• High-resolution spectroscopic study of dwarf stars in the northern sky: Na to Zn abundances in two fields with radii of 20 degrees
• Bimodal Distribution of Galactic Disk Stars on the [alpha/Fe]-[Fe/H] Plane as a Possible Evidence of Discontinuous Radial Migration History
• A white dwarf bound to the transiting planetary system WASP-98
• A Catalog of 531 White Dwarf Candidates in the Local Galactic Halo from Gaia Data Release 2
• An Updated Line List for Spectroscopic Investigation of G Stars II: Refined Solar Abundances via Extended Wavelength Coverage to 10 000 Å
• One of Everything: The Breakthrough Listen Exotica Catalog
• GALAH Survey: Chemically Tagging the Thick Disk
• Gaia Benchmark stars and their twins in the Gaia-ESO Survey
• Collisionless Boltzmann equation approach for the study of stellar discs within barred galaxies
• Experimental oscillator strengths of Al I lines for near-infrared astrophysical spectroscopy
• Yields from massive stars in binaries. Chemical evolution of the Milky Way disk
• Globular clusters in \textsc{OrbIT}: complete dynamical characterisation of the globular cluster population of the Milky Way through updated orbital reconstruction
• Measurement of stellar and substellar winds using white dwarf hosts
• The Chemodynamical Nature of the Triangulum-Andromeda Overdensity
• Assessing stellar yields in Galaxy chemical evolution: observational stellar abundance patterns
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. VI: Confirmation of a Long-Period Giant Planet Discovered with a Single TESS Transit
• Towards characterising rocky worlds: Trends in chemical make-ups of M dwarfs versus GK dwarfs
• The Gaia RVS benchmark stars II. A sample of stars selected for their Gaia high radial velocity
• Rare Find: Discovery and chemo-dynamical properties of two s-process enhanced RR Lyrae stars
• Unveiling the nature of HE 0107-5240
• Survey for Distant Solar Twins (SDST) -- III. Identification of new solar twin and solar analogue stars
• The disc origin of the Milky Way bulge: On the high velocity dispersion of metal-rich stars at low latitude
• On the origin of the Hercules group: I. chemical signatures indicating the outer bar origin
• A slow spin to win -- the gradual evolution of the proto-Galaxy to the old disc
• On the Use of Field RR Lyrae as Galactic Probes -- VIII. Early Formation of the Galactic Spheroid
• A hot white dwarf merger remnant revealed by an ultraviolet detection of carbon
• Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries -- II: Carbon, oxygen, and odd-Z iron-peak abundances of the primary stars
• Chemodynamics of the Milky Way and disc formation history: insight from the RAVE and Gaia-ESO surveys
• Peculiarities of Abundances of Selected Elements in Metal-Rich Field RR Lyrae Stars
• Star formation and gas flow history of a dwarf irregular galaxy traced by gas-phase and stellar metallicities
• Photometric Calibration of the $[\alpha /$Fe] Element: II. Calibration with SDSS Photometry
• Photometric Calibration of the [$\alpha$/Fe] Element: I. Calibration with UBV Photometry
• Inconsistency of Chemical Properties of Stellar Populations in the Thick Disk Subsystem of Our Galaxy
• A transiting rocky super-Earth and a non-transiting sub-Neptune orbiting the M dwarf TOI-771
• Survey for Distant Solar Twins (SDST) -- II. Design, observations and data
• Benchmark stars, benchmark spectrographs: Detailed spectroscopic comparison of ESPRESSO, PEPSI, and HARPS data for Gaia benchmark stars
• The highest mass Kepler red giants -- II. Spectroscopic parameters, the amplitude-activity relation, and unexpected halo orbits
• iota Horologii is unlikely to be an evaporated Hyades star
• Partitioning the Galactic Halo with Gaussian Mixture Models
• Stellar Characterization and a Chromospheric Activity Analysis of a K2 Sample of Planet-Hosting Stars
• The average X-ray spectrum of the volume-complete M-, F-, G-, and K-type star sample within 10 pc of the Sun
• Metallicity and absolute magnitude calibrations for F-G type main-sequence stars in the Gaia era
• Outer Regions of the Milky Way
• Wide sdB binaries. I. Orbital and atmospheric parameters
• Confronting compositional confusion through the characterisation of the sub-Neptune orbiting HD 77946
• The impact of rare events on the chemical enrichment in dwarf galaxies
• Effects of Metallicity on Graphite, TiC, and SiC Condensation in Carbon Stars
• Rediscovering the Milky Way with orbit superposition approach and APOGEE data III. Panoramic view of the bulge
• Mass-dependent chemical enrichment sequences of SDSS star-forming galaxies out to z~0.3 revealed by direct O & Ar abundances
• The Spheroidal Bulge of the Milky Way: Chemodynamically Distinct from the Inner-Thick Disc and Bar
• Searching for the nature of stars with debris disks and planets
• Quantifying chemical and kinematical properties of Galactic disks
• Physical and Chemical Properties of Galactic Global Clusters with Various Origins Identified from the Gaia DR2 Data
• Gas-depleted planet formation occurred in the four-planet system around the red dwarf LHS 1903
• The GAPS programme at TNG LXXI. A sub-Neptune suitable for atmospheric characterization in a multiplanet and mutually inclined system orbiting the bright K dwarf TOI-5789 (HIP 99452)
• The age-metallicity structure of the Milky Way disc with APOGEE
• First large scale spatial and velocity patterns of local metal-rich stars in the Milky Way
• Chemical tagging experiment with the Gaia-ESO open clusters
• Exploring the History of Stellar Mergers with Chemistry: Examining the Origins of Massive $\alpha$-Enriched Stars using Carbon Isotope Ratios
• Lessons learnt from the Solar neighbourhood and the Kepler field
• Impact of the latest 22Ne+α reaction rates on nucleosynthesis in massive stars and galactic chemical evolution
• An Integral Field Spectroscopy Study Of Thin And Thick Discs In IC 2531
• Spectroscopic and asteroseismic analysis of the secondary clump red giant HD 226808
• Distribution of Europium in The Milky Way Disk; Its Connection to Planetary Habitability and The Source of The R-Process
• Seismic and spectroscopic analysis of 9 bright red giants observed by Kepler
• Stellar age determination using deep neural networks: Isochrone ages for 1.3 million stars, based on BaSTI, MIST, PARSEC, Dartmouth and SYCLIST evolutionary grids
• A Comparison of Full Spectral Fitting Codes for Measuring the Stellar Initial Mass Function and Other Stellar Population Properties in Elliptical Galaxies
• A Sequoia stellar candidate with very high 7Li and 9Be
• IY Lyr: A Thick-Disk first-overtone RR Lyrae Star with a Possible Neutron Star Companion
• Two sequences in the age-metallicity relation as seen from [C/N] abundances in APOGEE
• The COMBS Survey -- III. The Chemodynamical Origins of Metal-Poor Bulge Stars
• Planets Across Space and Time (PAST). II: Catalog and Analyses of the LAMOST-Gaia-Kepler Stellar Kinematic Properties
• TOI-7154b: A Close-in Massive Brown Dwarf in an Eccentric Orbit
• 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
• Galactic Surveys in the Gaia Era
• Discovery of O stars in the tidal Magellanic Bridge: Stellar parameters, abundances, and feedback of the nearest metal-poor massive stars and their implication for the Magellanic System ecology
• Purveyors of fine halos III. Chemical abundance analysis of a potential omega Cen associate
• APOGEE chemical abundances of stars in the MW satellites Fornax, Sextans, Draco and Carina
• Fundamental mechanism of the creation of chemical bimodality in the Milky Way disc in the cold accretion theory
• TOI-6884b: A low-mass brown dwarf transiting a slightly evolved star
• EDGE-INFERNO: How chemical enrichment assumptions impact the individual stars of a simulated ultra-faint dwarf galaxy
• LRPayne: Stellar parameters and abundances from low-resolution spectra
• The vertical structure of the stellar disk in NGC 551
• NEWS: the near-infrared Echelle for wideband spectroscopy
• Observational constraints on the origin of the elements. X. Combining NLTE and machine learning for chemical diagnostics of 4 million stars in the 4MIDABLE-HR survey
• Ross 19B: An Extremely Cold Companion Discovered via the Backyard Worlds: Planet 9 Citizen Science Project
• Searching for GEMS: Three warm Saturns and a super-Jupiter orbiting four early M-dwarfs
• Inversion of Hydrogen-rich Atmosphere and Water Content for GJ 486b
• Stellar Abundances at the Center of Early Type Galaxies with Fine Structure
• Atomic Radiative Data for Oxygen and Nitrogen for Solar Photospheric Studies
• Blanco DECam Bulge Survey (BDBS) IV: Metallicity Distributions and Bulge Structure from 2.6 Million Red Clump Stars
• Spectroscopic constraints for low-mass asteroseismic targets
• A Near-Infrared and Optical Study of NGC 5822: An Open Cluster Hosting Barium-stars and Lithium-Enriched Giant Stars
• The age and abundance structure of the stellar populations in the central sub-kpc of the Milky Way
• TOI-3757 b: A low density gas giant orbiting a solar-metallicity M dwarf
• Neutron-capture elements record the ordered chemical evolution of the disc over time
• Closing remarks and Outlook
• Sulfur abundances in the Galactic bulge and disk
• Sibling Sub-Neptunes Around Sibling M Dwarfs: TOI-521 and TOI-912
• PISP: Projected-Space Inference of Stellar Parameters
• The chemodynamical memory of a major merger in a NIHAO-UHD Milky Way analogue -- I. A golden thread through time and space
• Ages of Main-Sequence Turn-Off Stars from the GALAH Survey