xCOLDGASS and xGASS: Radial metallicity gradients and global properties on the star-forming main sequence

Abstract

Context. The xGASS and xCOLD GASS surveys have measured the atomic (HI) and molecular gas (H2) content of a large and representative sample of nearby galaxies (redshift range of 0.01 $<$ z $<$ 0.05). Aims. We present optical longslit spectra for a subset of the xGASS and xCOLD GASS galaxies to investigate the correlation between radial metallicity profiles and cold gas content. In addition to data from Moran et al. (2012), this paper presents new optical spectra for 27 galaxies in the stellar mass range of 9.0 $\le$ log Mstar/Msun $\le$ 10.0. Methods. The longslit spectra were taken along the major axis of the galaxies, allowing us to obtain radial profiles of the gas-phase oxygen abundance (12 + log(O/H)). The slope of a linear fit to these radial profiles is defined as the metallicity gradient. We investigated correlations between these gradients and global galaxy properties, such as star formation activity and gas content. In addition, we examined the correlation of local metallicity measurements and the global HI mass fraction. Results. We obtained two main results: (i) the local metallicity is correlated with the global HI mass fraction, which is in good agreement with previous results. A simple toy model suggests that this correlation points towards a 'local gas regulator model'; (ii) the primary driver of metallicity gradients appears to be stellar mass surface density (as a proxy for morphology). Conclusions. This work comprises one of the few systematic observational studies of the influence of the cold gas on the chemical evolution of star-forming galaxies, as considered via metallicity gradients and local measurements of the gas-phase oxygen abundance. Our results suggest that local density and local HI mass fraction are drivers of chemical evolution and the gas-phase metallicity.

arXiv comment17 pages, 12 figures plus appendix (10 additional pages), accepted for publication in A&A, a table of galaxy measurements as well as calibrated 2D spectra of low mass galaxies will be available from VizieR (http://vizier.u-strasbg.fr/)

References in corpus (67)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Astropy: A Community Python Package for Astronomy
• Stellar population synthesis at the resolution of 2003
• The Sloan Digital Sky Survey: Technical Summary
• Galactic Stellar and Substellar Initial Mass Function
• The Seventh Data Release of the Sloan Digital Sky Survey
• The Host Galaxies of AGN
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• The SIMBAD astronomical database
• [O III]/[N II] as an Abundance Indicator at High Redshift
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• The VizieR database of Astronomical Catalogues
• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
• Gas-regulation of galaxies: the evolution of the cosmic sSFR, the metallicity-mass-SFR relation and the stellar content of haloes
• Chemical evolution with radial mixing
• The Impact of cold gas accretion above a mass floor on galaxy scaling relations
• The KMOS^3D Survey: design, first results, and the evolution of galaxy kinematics from 0.7<z<2.7
• The O3N2 and N2 abundance indicators revisited: improved calibrations based on CALIFA and Te-based literature data
• xCOLD GASS: the complete IRAM-30m legacy survey of molecular gas for galaxy evolution studies
• COLD GASS, an IRAM legacy survey of molecular gas in massive galaxies: I. Relations between H2, HI, stellar content and structural properties
• A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
• The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic HI Source Catalog
• The GALEX Arecibo SDSS Survey. I. Gas Fraction Scaling Relations of Massive Galaxies and First Data Release
• xGASS: Total cold gas scaling relations and molecular-to-atomic gas ratios of galaxies in the local Universe
• Quantifying the uncertainties of chemical evolution studies. II. Stellar yields
• Chemo-spectrophotometric evolution of spiral galaxies: I. The model and the Milky Way
• The Universal Relation of Galactic Chemical Evolution: The Origin of the Mass-Metallicity Relation
• 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
• Reconstructing the Subsurface Three-Dimensional Magnetic Structure of A Solar Active Region Using SDO/HMI Observations
• New Lessons from the HI Size-Mass Relation of Galaxies
• Validation of the equilibrium model for galaxy evolution to z~3 through molecular gas and dust observations of lensed star-forming galaxies
• WALLABY -- An SKA Pathfinder HI Survey
• Metallicity gradients in local field star-forming galaxies: Insights on inflows, outflows, and the coevolution of gas, stars and metals
• The KMOS Redshift One Spectroscopic Survey (KROSS): Dynamical properties, gas and dark matter fractions of typical z~1 star-forming galaxies
• The GALEX Arecibo SDSS Survey. VIII. Final Data Release -- The Effect of Group Environment on the Gas Content of Massive Galaxies
• The Neutral Hydrogen Content of Galaxies in Cosmological Hydrodynamic Simulations
• A fundamental relation between the metallicity, gas content, and stellar mass of local galaxies
• Shape of the oxygen abundance profiles in CALIFA face-on spiral galaxies
• The role of cold gas and environment on the stellar mass - metallicity relation of nearby galaxies
• A Universal Neutral Gas Profile for Nearby Disk Galaxies
• The GALEX Arecibo SDSS Survey V: The Relation between the HI Content of Galaxies and Metal Enrichment at their Outskirts
• Modern yields per stellar generation: the effect of the IMF
• The SAMI Galaxy Survey: Spatially Resolving the Main Sequence of Star Formation
• PPAK Wide-field Integral Field Spectroscopy of NGC 628: II. Emission line abundance analysis
• The Effect of Structure and Star Formation on the Gas Content of Nearby Galaxies
• The MUSE Atlas of Disks (MAD): Resolving Star Formation Rates and Gas Metallicities on < 100pc Scales
• SDSS IV MaNGA - The spatially resolved transition from star formation to quiescence
• On the origin of the fundamental metallicity relation and the scatter in galaxy scaling relations
• The SAMI Galaxy Survey: Spatially Resolved Metallicity and Ionization Mapping
• The Arecibo Legacy Fast ALFA Survey: II. Results of Precursor Observations
• Using dust, gas and stellar mass selected samples to probe dust sources and sinks in low metallicity galaxies
• SDSS-IV MaNGA: What Shapes The Distribution Of Metals In Galaxies? Exploring The Roles Of The Local Gas Fraction And Escape Velocity
• HI-MaNGA: HI Followup for the MaNGA Survey
• The Effects of Diffuse Ionized Gas and Spatial Resolution on Metallicity Gradients: TYPHOON Two-Dimensional Spectrophotometry of M83
• Accretion, radial flows and abundance gradients in spiral galaxies
• Galaxy metallicities depend primarily on stellar mass and molecular gas mass
• Radial gas motions in The HI Nearby Galaxy Survey (THINGS)
• xGASS: Cold gas content and quenching in galaxies below the star forming main sequence
• The chemical evolution of local star forming galaxies: Radial profiles of ISM metallicity, gas mass, and stellar mass and constraints on galactic accretion and winds
• The role of atomic hydrogen in regulating the scatter of the mass-metallicity relation
• How Does the Surface Density and Size of Disk Galaxies Measured in Hydrodynamic Simulations Correlate with the Halo Spin Parameter?
• The dependence of oxygen and nitrogen abundances on stellar mass from the CALIFA survey
• Metallicity gradients in small and nearby spiral galaxies
• Understanding chemical evolution in resolved galaxies -- I The local star fraction-metallicity relation
• Gas-phase metallicity profiles of the Bluedisk galaxies: Is metallicity in a local star-formation regulated equilibrium?

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