Chemical Cartography with APOGEE: Multi-element abundance ratios

Abstract

We map the trends of elemental abundance ratios across the Galactic disk, spanning R = 3-15 kpc and midplane distance |Z|= 0-2 kpc, for 15 elements in a sample of 20,485 stars measured by the SDSS/APOGEE survey (O, Na, Mg, Al, Si, P, S, K, Ca, V, Cr, Mn, Fe, Co, Ni). Adopting Mg rather than Fe as our reference element, and separating stars into two populations based on [Fe/Mg], we find that the median trends of [X/Mg] vs. [Mg/H] in each population are nearly independent of location in the Galaxy. The full multi-element cartography can be summarized by combining these nearly universal median sequences with our measured metallicity distribution functions and the relative proportions of the low-[Fe/Mg] (high-alpha) and high-[Fe/Mg] (low-alpha) populations, which depend strongly on R and |Z|. We interpret the median sequences with a semi-empirical "2-process" model that describes both the ratio of core collapse and Type Ia supernova contributions to each element and the metallicity dependence of the supernova yields. These observationally inferred trends can provide strong tests of supernova nucleosynthesis calculations. Our results lead to a relatively simple picture of abundance ratio variations in the Milky Way, in which the trends at any location can be described as the sum of two components with relative contributions that change systematically and smoothly across the Galaxy. Deviations from this picture and future extensions to other elements can provide further insights into the physics of stellar nucleosynthesis and unusual events in the Galaxy's history.

arXiv comment29 pp, 22 figs, submitted to AAS journals, comments welcome

References in corpus (80)

• The Sloan Digital Sky Survey: Technical Summary
• Galactic Stellar and Substellar Initial Mass Function
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• First stars V - Abundance patterns from C to Zn and supernova yields in the early Galaxy
• Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
• Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
• Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
• Galactic Chemical Evolution: Hydrogen Through Zinc
• Elemental Abundance Survey of The Galactic Thick Disk
• Galactic chemical evolution: Carbon through Zinc
• The First Data Release (DR1) of the LAMOST general survey
• New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey
• The GALAH Survey: Scientific Motivation
• The Chemical Compositions of Galactic Disk F and G Dwarfs
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• Chemical evolution with radial mixing
• Updated stellar yields from Asymptotic Giant Branch models
• 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
• Three-dimensional delayed-detonation models with nucleosynthesis for Type Ia supernovae
• Chemodynamical evolution of the Milky Way disk I: The solar vicinity
• The spatial structure of mono-abundance sub-populations of the Milky Way disk
• The nucleosynthesis of Al26 and Fe60 in solar metallicity stars extending in mass from 11 to 120 Msun: the hydrostatic and explosive contributions
• The Data Reduction Pipeline for the Apache Point Observatory Galactic Evolution Experiment
• The Galactic Thick Disk Stellar Abundances
• Abundances, Stellar Parameters, and Spectra From the SDSS-III/APOGEE Survey
• Target Selection for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• A New Mechanism for Radial Migration in Galactic Disks: Spiral-Bar Resonance Overlap
• Explosive yields of massive stars from Z=0 to Z=Zsun
• Type-Ia supernova rates and the progenitor problem, a review
• Target Selection for the SDSS-IV APOGEE-2 Survey
• The delay-time distribution of type-Ia supernovae from Sloan II
• Yields of AGB and SAGB models with chemistry of low- and high-metallicity Globular Clusters
• 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
• Red giant masses and ages derived from carbon and nitrogen abundances
• New ATLAS9 And MARCS Model Atmosphere Grids for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• Chemodynamical evolution of the Milky Way disk II: Variations with Galactic radius and height above the disk plane
• The Landscape of the Neutrino Mechanism of Core-Collapse Supernovae: Neutron Star and Black Hole Mass Functions, Explosion Energies and Nickel Yields
• StarHorse: A Bayesian tool for determining stellar masses, ages, distances, and extinctions for field stars
• The stellar population structure of the Galactic disk
• A First Constraint on the Thick Disk Scale Length: Differential Radial Abundances in K Giants at Galactocentric Radii 4, 8, and 12 kpc
• NLTE abundances of Mn in a sample of metal-poor stars
• The supernova delay time distribution in galaxy clusters and implications for Type-Ia progenitors and metal enrichment
• Chemodynamics of the Milky Way. I. The first year of APOGEE data
• Tracing chemical evolution over the extent of the Milky Way's Disk with APOGEE Red Clump Stars
• On the Formation of Galactic Thick Disks
• The age-metallicity structure of the Milky Way disk
• Chemistry of the Sagittarius Dwarf Galaxy: a Top-Light IMF, Outflows and the R-Process
• Chemical Cartography with APOGEE: Large-scale Mean Metallicity Maps of the Milky Way
• The SDSS-III APOGEE Spectral Line List for H-band Spectroscopy
• Inflow, Outflow, Yields, and Stellar Population Mixing in Chemical Evolution Models
• Measuring Radial Orbit Migration in the Milky Way Disk
• APOGEE Data Releases 13 and 14: Stellar Parameter and Abundance Comparisons With Independent Analyses
• Metallicity Gradients in the Milky Way Disk as Observed by the SEGUE Survey
• New H-band Stellar Spectral Libraries for the SDSS-III/APOGEE survey
• Origin of chemically distinct discs in the Auriga cosmological simulations
• A Short Scale Length for the α-Enhanced Thick Disk of the Milky Way: Evidence from Low-Latitude SEGUE Data
• The origin and evolution of the odd-Z iron-peak elements Sc, V, Mn, and Co in the Milky Way stellar disk
• The Gaia-ESO Survey: the chemical structure of the Galactic discs from the first internal data release
• Equilibrium and Sudden Events in Chemical Evolution
• An accurate and self-consistent chemical abundance catalogue for the APOGEE/Kepler sample
• Full computation of massive AGB evolution. II. The role of mass loss and cross-sections
• The origin of diverse $\alpha$-element abundances in galaxy discs
• Cepheid Abundances: Multiphase Results and Spatial Gradients
• Principal Component Analysis on Chemical Abundances Spaces
• On the alpha-element gradients of the Galactic thin disk using Cepheids
• The relationship between mono-abundance and mono-age stellar populations in the Milky Way disk
• Chemical abundances of hydrostatic and explosive alpha-elements in Sagittarius stream stars
• Identifying Sagittarius Stream Stars By Their APOGEE Chemical Abundance Signatures
• Cosmic variance in [O/Fe] in the Galactic disk
• Distance and extinction determination for APOGEE stars with Bayesian method
• The IGIMF and other IMFs in dSphs: the case of Sagittarius
• On the Optimal Choice of Nucleosynthetic Yields, IMF and Number of SNe Ia for Chemical Evolution Modelling
• The Chemical Abundance Structure of the Inner Milky Way: A Signature of "Upside-Down" Disk Formation?

Cited by in corpus (95)

• From dawn till disk: Milky Way's turbulent youth revealed by the APOGEE+Gaia data
• The Explosion of Helium Stars Evolved With Mass Loss
• From the bulge to the outer disc: StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys
• Homogeneous Analysis of Globular Clusters from the APOGEE Survey with the BACCHUS Code. II. The Southern Clusters and Overview
• APOGEE Chemical Abundance Patterns of the Massive Milky Way Satellites
• The electromagnetic counterparts of compact binary mergers
• Robust Data-driven Metallicities for 175 Million Stars from Gaia XP Spectra
• The chemical characterisation of halo substructure in the Milky Way based on APOGEE
• The Milky Way bar and bulge revealed by APOGEE DR16 and Gaia EDR3
• Chemical Enrichment and Radial Migration in the Galactic Disk -- the origin of the [$\alpha /\mathrm{Fe}]$ Double Sequence
• Selecting accreted populations: metallicity, elemental abundances, and ages of the Gaia-Sausage-Enceladus and Sequoia populations
• APOGEE DR16: a multi-zone chemical evolution model for the Galactic disc based on MCMC methods
• In the Galactic disk, stellar [Fe/H] and age predict orbits and precise [X/Fe]
• Spatial variations in the Milky Way disc metallicity-age relation
• Stellar migrations and metal flows -- Chemical evolution of the thin disc of a simulated Milky Way analogous galaxy
• A Tale of Two Disks: Mapping the Milky Way with the Final Data Release of APOGEE
• The bursty origin of the Milky Way thick disc
• Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
• The ASAS-SN Catalog of Variable Stars IX: The Spectroscopic Properties of Galactic Variable Stars
• Nucleosynthesis imprints from different Type Ia Supernova explosion scenarios and implications for galactic chemical evolution
• The Close Binary Fraction as a Function of Stellar Parameters in APOGEE: A Strong Anti-Correlation With $\alpha$ Abundances
• Unveiling the time evolution of chemical abundances across the Milky Way disk with APOGEE
• How Many Elements Matter?
• The Similarity of Abundance Ratio Trends and Nucleosynthetic Patterns in the Milky Way Disk and Bulge
• Stellar Abundance Maps of the Milky Way Disk
• On the origin of the Galactic thin and thick discs, their abundance gradients and the diagnostic potential of their abundance ratios
• Chemical Cartography with APOGEE: Mapping Disk Populations with a Two-Process Model and Residual Abundances
• Abundance ratios in GALAH DR2 and their implications for nucleosynthesis
• The K2 Galactic Archaeology Program Data Release 3: Age-abundance patterns in C1-C8 and C10-C18
• The Milky Way tomography with APOGEE: intrinsic density distribution and structure of mono-abundance populations
• The homogeneity of the star forming environment of the Milky Way disk over time
• Light Elements in the Universe
• The chemical evolution of r-process elements from neutron star mergers: the role of a 2-phase interstellar medium
• Abundances in the Milky Way across five nucleosynthetic channels from 4 million LAMOST stars
• The stellar velocity distribution function in the Milky Way galaxy
• The Three-Phase Evolution of the Milky Way
• Comparative analysis of atmospheric parameters from high-resolution spectroscopic sky surveys: APOGEE, GALAH, Gaia-ESO
• Open Cluster Chemical Homogeneity Throughout the Milky Way
• A Comparative Analysis of the Chemical Compositions of Gaia-Enceladus/Sausage and Milky Way Satellites using APOGEE
• The distribution of [$\alpha$/Fe] in the Milky Way disc
• Evidence for sub-Chandrasekhar Type Ia supernovae from the last major merger
• The Impact of Black Hole Formation on Population Averaged Supernova Yields
• Know thy star, know thy planet: Chemo-kinematically characterizing TESS targets
• The Galactic Chemical Evolution of phosphorus observed with IGRINS
• Combined APOGEE-GALAH stellar catalogues using the Cannon
• Residual Abundances in GALAH DR3: Implications for Nucleosynthesis and Identification of Unique Stellar Populations
• Empirical Constraints on the Nucleosynthesis of Nitrogen
• The relationship between age, metallicity, and abundances for disk stars in a simulated Milky Way galaxy
• Variations in $\alpha$-element ratios trace the chemical evolution of the disk
• Nature vs. Nurture: Distinguishing Effects from Stellar Processing and Chemical Evolution on Carbon and Nitrogen in Red Giant Stars
• On the use of Sulphur as a tracer for abundances in galaxies
• Carbon, isotopic ratio ${}^{12}$C/${}^{13}$C and nitrogen in solar twins: constraints for the chemical evolution of the local disc
• The Galactic Distribution of Phosphorus: A Survey of 163 Disk and Halo Stars
• An Intermediate-age Alpha-rich Galactic Population in K2
• Phosphorus Abundances in the Hyades and Galactic Disk
• The Gaia-ESO Survey: Oxygen abundance in the Galactic thin and thick disks
• Fluorine Abundances in the Galactic Disk
• Disentangled Representation Learning for Astronomical Chemical Tagging
• Statistics of the Chemical Composition of Solar Analog Stars and Links to Planet Formation
• Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
• NLTE modelling of integrated light spectra. Abundances of barium, magnesium, and manganese in a metal-poor globular cluster
• Disc dichotomy signature in the vertical distribution of [Mg/Fe] and the delayed gas infall scenario
• Using cosmological simulations and synthetic absorption spectra to assess the accuracy of observationally derived CGM metallicities
• The [Y/Mg] chemical clock in the Galactic Disk: The influence of metallicity and Galactic population in the solar neighbourhood
• Study of the departures from LTE in the unevolved stars infra-red spectra
• Chemical Cartography with APOGEE: Two-process Parameters and Residual Abundances for 288,789 Stars from Data Release 17
• An unsupervised method for identifying $X$-enriched stars directly from spectra: Li in LAMOST
• Metallicity-Suppressed Collapsars Cannot be the Dominant r-Process Source in the Milky Way
• The chemical enrichment of the Milky Way disk evaluated using conditional abundances
• A distinct halo population revealed from 3D non-LTE magnesium abundances
• The earliest phases of CNO enrichment in galaxies
• Untangling the Sources of Abundance Dispersion in Low-Metallicity Stars
• The GALAH Survey: Dependence of elemental abundances on age and metallicity for stars in the Galactic disc
• Rediscovering the Milky Way with orbit superposition approach and APOGEE data II. Chrono-chemo-kinematics of the disc
• Are Milky-Way-like galaxies like the Milky Way? A view from SDSS-IV/MaNGA
• 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
• Studying stellar populations in Omega Centauri with phylogenetics
• A two-phase model of galaxy formation: III. The formation of globular clusters
• SSSpaNG! Stellar Spectra as Sparse, data-driven, Non-Gaussian processes
• On the Contribution of Very Massive Stars to the Sulfur Abundance in Star-Forming Galaxies: the Role of PISN
• Stellar Population Astrophysics (SPA) with the TNG. alpha-elements, lithium, sodium and aluminum in 16 open clusters
• Stellar Migration and Chemical Enrichment in the Milky Way Disc: A Hybrid Model
• Reconstructing the Milky Way chemical map with Galactic Chemical Evolution tool OMEGA+ from SDSS-MWM
• Chemical tagging with APOGEE, MUSE, and HST: constraints on the formation of $\omega$ Centauri
• Elemental Abundances of Kepler Objects of Interest in APOGEE DR17
• Inferring Galactic Parameters from Chemical Abundances: A Multi-Star Approach
• Milky Way Mapper decoded abundances -- I. Shared disc enrichment patterns
• Towards Understanding the Milky Way's Typicality: Assessing the Chemodynamics of M31's Bulge & Bar, Thick & Thin Discs
• The Stellar Chemical Abundances of Simulated Massive Galaxies at $z=2$
• Accurate Determination of Chemical Abundances near a Supermassive Black Hole
• APOGEE chemical abundances of stars in the MW satellites Fornax, Sextans, Draco and Carina
• Homogeneous abundance ratios of hydrostatic and explosive alpha-elements in globular clusters from high resolution optical spectroscopy
• PISP: Projected-Space Inference of Stellar Parameters
• Neutron-capture elements record the ordered chemical evolution of the disc over time
• The Multiband Imaging Survey for High-Alpha PlanetS (MISHAPS) I: Preliminary Constraints on the Occurrence Rate of Hot Jupiters in 47 Tucanae