Both Stellar Mass and Gravitational Potential Shape the Gas-Phase Metallicity

Abstract

The relation between metallicity and galaxy mass (the so-called mass-metallicity relation) is the strongest and most prominent among scaling relations between chemical enrichment and galactic properties. However, it is unclear whether this relation primarily traces metal retention or the integrated production of metals, as past studies have obtained contrasting results. We investigate this issue through an extensive Random Forest and Partial Correlations analysis of spectral cubes of 4,500 galaxies from the MaNGA survey. We find that stellar mass (${\mathrm{M}}_{\ast }$) and baryonic gravitational potential (${\mathrm{\Phi }}_{\ast }={\mathrm{M}}_{\ast }/{\mathrm{R}}_{\mathrm{e}}$) are the two most important quantities determining gas metallicity in galaxies. However, their relative roles strongly depend on the galactocentric radius -- the metallicity within 0.7~${\mathrm{R}}_{\mathrm{e}}$ depends primarily on the stellar mass, while the metallicity at radii beyond 0.9~${\mathrm{R}}_{\mathrm{e}}$ depends primarily on the gravitational potential. This finding can be interpreted in terms of metals in the central region ($\mathrm{R}\le 0.7{\mathrm{R}}_{\mathrm{e}}$) being mostly bound, regardless of the global gravitational potential and, therefore, the metallicity is determined primarily by the cumulative production of metals (hence the integrated star formation history, i.e. ${\mathrm{M}}_{\ast }$); by contrast, in the galactic peripheries the retention of metals depends more critically on the gravitational potential, hence the stronger dependence of the metallicity on ${\mathrm{\Phi }}_{\ast }$ at large radii. Our finding reconciles apparent discrepancies between previous results. Finally, we find that the Star Formation Rate is the third most important parameter (after ${\mathrm{M}}_{\ast }$ and ${\mathrm{\Phi }}_{\ast }$) in determining the metallicity, as expected from the Fundamental Metallicity Relation.

arXiv comment16 pages, 12 figures, 2 tables. Accepted by MNRAS

References in corpus (102)

• Scikit-learn: Machine Learning in Python
• On the variation of the Initial Mass Function
• Star Formation in Galaxies Along the Hubble Sequence
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The Seventh Data Release of the Sloan Digital Sky Survey
• The Host Galaxies of AGN
• Cosmic Star Formation History
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• The physical properties of star forming galaxies in the low redshift universe
• Star Formation in the Milky Way and Nearby Galaxies
• Observational Evidence of AGN Feedback
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• UV Star Formation Rates in the Local Universe
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• The Circumgalactic Medium
• A fundamental relation between mass, SFR and metallicity in local and high redshift galaxies
• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• AMAZE. I. The evolution of the mass-metallicity relation at z>3
• Gas-regulation of galaxies: the evolution of the cosmic sSFR, the metallicity-mass-SFR relation and the stellar content of haloes
• De Re Metallica: The cosmic chemical evolution of galaxies
• A Catalog of Bulge+Disk Decompositions and Updated Photometry for 1.12 Million Galaxies in the Sloan Digital Sky Survey
• Strangulation as the primary mechanism for shutting down star formation in galaxies
• The Large, Oxygen-Rich Halos of Star-Forming Galaxies Are A Major Reservoir of Galactic Metals
• Measuring the inclination and mass-to-light ratio of axisymmetric galaxies via anisotropic Jeans models of stellar kinematics
• A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
• The Gemini Deep Deep Survey. VII. The Redshift Evolution of the Mass-Metallicity Relation
• A Halo-Based Galaxy Group Finder: Calibration and Application to the 2dFGRS
• A fundamental plane for field star-forming galaxies
• The Mass-Metallicity and the Fundamental Metallicity Relation revisited on a fully Te-based abundance scale for galaxies
• The SDSS-IV MaNGA Sample: Design, Optimization, and Usage Considerations
• SDSS-IV MaNGA IFS Galaxy Survey --- Survey Design, Execution, and Initial Data Quality
• The Metallicity-Luminosity Relation, Effective Yields, and Metal Loss in Spiral and Irregular Galaxies
• The Data Analysis Pipeline for the SDSS-IV MaNGA IFU Galaxy Survey: Overview
• Clues to the Origin of the Mass-Metallicity Relation: Dependence on Star Formation Rate and Galaxy Size
• The stellar populations of spiral galaxies
• The Cosmic Baryon and Metal Cycles
• Oxygen and nitrogen abundances in nearby galaxies. Correlations between oxygen abundance and macroscopic properties
• SDSS IV MaNGA - Metallicity and nitrogen abundance gradients in local galaxies
• New fully empirical calibrations of strong-line metallicity indicators in star forming galaxies
• The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z~8
• The MOSDEF Survey: The Evolution of the Mass-Metallicity Relation from $z=0$ to $z\sim 3.3$
• Full spectrum fitting with photometry in pPXF: stellar population versus dynamical masses, non-parametric star formation history and metallicity for 3200 LEGA-C galaxies at redshift z~0.8
• The Mass-Metallicity relation explored with CALIFA: I. Is there a dependence on the star formation rate?
• Metallicity evolution, metallicity gradients and gas fractions at z~3.4
• Gas accretion as the origin of chemical abundance gradients in distant galaxies
• Star formation in a galactic outflow
• The relation between metallicity, stellar mass and star formation in galaxies: an analysis of observational and model data
• The Data Analysis Pipeline for the SDSS-IV MaNGA IFU Galaxy Survey: Emission-Line Modeling
• Metallicity gradients in local field star-forming galaxies: Insights on inflows, outflows, and the coevolution of gas, stars and metals
• In-N-Out: the gas cycle from dwarfs to spiral galaxies
• A fundamental relation between the metallicity, gas content, and stellar mass of local galaxies
• The role of cold gas and environment on the stellar mass - metallicity relation of nearby galaxies
• Mapping metallicity variations across nearby galaxy disks
• How do central and satellite galaxies quench? -- Insights from spatially resolved spectroscopy in the MaNGA survey
• SDSS-IV MaNGA: pyPipe3D analysis release for 10,000 galaxies
• From haloes to Galaxies - I. The dynamics of the gas regulator model and the implied cosmic sSFR history
• The Mass-Metallicity Relation revisited with CALIFA
• Are galactic star formation and quenching governed by local, global or environmental phenomena?
• Metal-enriched galactic outflows shape the mass-metallicity relationship
• A new scaling relation for HII regions in spiral galaxies: unveiling the true nature of the mass-metallicity relation
• SDSS-IV MaNGA: Global stellar population and gradients for about 2000 early-type and spiral galaxies on the mass-size plane
• Fundamental metallicity relation in CALIFA, SDSS-IV MaNGA and high-z galaxies
• Gas Accretion via Condensation and Fountains
• Physical properties of galaxies and their evolution in the VIMOS VLT Deep Survey. I. The evolution of the mass-metallicity relation up to z~0.9
• The dependence of the galaxy mass-metallicity relation on environment and the implied metallicity of the IGM
• Comparing spectroscopic and photometric stellar mass estimates
• SDSS-IV MaNGA: Modeling the Spectral Line Spread Function to Sub-Percent Accuracy
• Efficient solution of the anisotropic spherically-aligned axisymmetric Jeans equations of stellar hydrodynamics for galactic dynamics
• The mass-metallicity and fundamental metallicity relations at z>2 using VLT and Subaru near-infrared spectroscopy of zCOSMOS galaxies
• SDSS-IV MaNGA: What Shapes The Distribution Of Metals In Galaxies? Exploring The Roles Of The Local Gas Fraction And Escape Velocity
• The quenching of galaxies, bulges, and disks since cosmic noon: A machine learning approach for identifying causality in astronomical data
• From 'bathtub' galaxy evolution models to metallicity gradients
• The oxygen abundance gradients in the gas discs of galaxies in the EAGLE simulation
• Knowing the unknowns: uncertainties in simple estimators of galactic dynamical masses
• The ALMaQUEST Survey IX: The nature of the resolved star forming main sequence
• Evolution of the Mass-Metallicity Relation from Redshift $z\approx 8$ to the Local Universe
• The SAMI Galaxy Survey: gravitational potential and surface density drive stellar populations -- I. early-type galaxies
• The role of atomic hydrogen in regulating the scatter of the mass-metallicity relation
• The metallicity's fundamental dependence on both local and global galactic quantities
• MaNGA DynPop -- I. Quality-assessed stellar dynamical modelling from integral-field spectroscopy of 10K nearby galaxies: a catalogue of masses, mass-to-light ratios, density profiles and dark matter
• Towards a deeper understanding of the physics driving galaxy quenching -- inferring trends in the gas content via extinction
• The mass-metallicity relation of Lyman-break analogues and its dependence on galaxy properties
• Recent Progress in Modeling the Macro- and Micro-Physics of Radio Jet Feedback in Galaxy Clusters
• Mass-Metallicity and Star Formation Rate in Galaxies: a complex relation tuned to stellar age
• Gravitational Potential and Surface Density Drive Stellar Populations -- II. Star-Forming Galaxies
• The gas-phase metallicities of star-forming galaxies in aperture-matched SDSS samples follow potential rather than mass or average surface density
• The SAMI galaxy survey: galaxy size can explain the offset between star-forming and passive galaxies in the mass-metallicity relationship
• What determines the local metallicity of galaxies: global stellar mass, local stellar mass surface density or star formation rate?
• The origin of the relation between metallicity and size in star-forming galaxies
• Stellar mass, not dynamical mass nor gravitational potential, drives the mass-metallicity relationship
• The fundamental metallicity relation emerges from the local anti-correlation between star formation rate and gas-phase metallicity existing in disk galaxies
• The interplay between feedback, accretion, transport and winds in setting gas-phase metal distribution in galaxies
• Fountain-driven gas accretion feeding star formation over the disc of NGC 2403
• Revisiting the fundamental metallicity relation with observation and simulation
• Local and global gas metallicity versus stellar age relation in MaNGA galaxies
• A Kinematic Analysis of Ionised Extraplanar Gas in the Spiral Galaxies NGC 3982 and NGC 4152
• The MAGPI survey: The interdependence of the mass, star formation rate, and metallicity in galaxies at z~0.3
• Temperature based radial metallicity gradients in nearby galaxies

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