On the effective oxygen yield in the disks of spiral galaxies

Abstract

The factors influencing chemical evolution of galaxies are poorly understood. Both gas inflow and gas outflow reduce a gas-phase abundance of heavy elements (metallicity) whereas the ongoing star formation continuously increases it. To exclude the stellar nucleosynthesis from consideration, we analyze for the sample of 14 spiral galaxies the radial distribution of the effective yield of oxygen $y_{eff}$, which would be identical to the true stellar yield (per stellar generation) $y_o$ if the evolution followed the closed box model. As the initial data for gas-phase abundance we used the O/H radial profiles from Moustakas, Kennicutt, Tremonti et al. (2010), based on two different calibrations (Pilyugin & Thuan 2005 (PT2005) and Kobulnicky & Kewley 2004 (KK2004) methods). In most of galaxies with the PT2005 calibration, which we consider as a preferred one, the yield $y_{eff}$ in the main disk ($R\ge 0.2R_{25}$, where $R_{25}$ is the optical radius) increases with radius, remaining lower than the empirically found true stellar yield $y_o$. This may indicate the inflow of low-enriched gas predominantly to the inner disk regions, which reduces $y_{eff}$. We show that the maximal values of the effective yield in the main disks of galaxies, $y_{eff,max}$, anti-correlate with the total mass of galaxies and with the mass of their dark halo enclosed within $R_{25}$. It allows to propose the higher role of gas accretion for galaxies with massive halos. We also found that the radial gradient of oxygen abundance normalized to $R_{25}$ has a tendency to be shallower in the systems with lower dark halo to stellar mass ratio within the optical radius, which, if confirmed, gives evidences of the effective radial mixing of gas in galaxies with the relatively light dark matter halo.

10 pages, 6 figures, accepted by AJ

References in corpus (34)

• The Star Formation Efficiency in Nearby Galaxies: Measuring Where Gas Forms Stars Effectively
• Stellar mass-to-light ratios and the Tully-Fisher relation
• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• Metallicities of 0.3<z<1.0 Galaxies in the GOODS-North Field
• The Impact of cold gas accretion above a mass floor on galaxy scaling relations
• Optical Spectroscopy and Nebular Oxygen Abundances of the Spitzer/SINGS Galaxies
• A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
• Feedback and Recycled Wind Accretion: Assembling the z=0 Galaxy Mass Function
• 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
• The rates and modes of gas accretion on to galaxies and their gaseous haloes
• The Mass-Metallicity relation explored with CALIFA: I. Is there a dependence on the star formation rate?
• The Metallicity of Galaxy Disks: Infall versus Outflow
• Star formation sustained by gas accretion
• A Dynamical Model for the Extra-planar Gas in Spiral Galaxies
• The DiskMass Survey. VII. The distribution of luminous and dark matter in spiral galaxies
• The Abundance Properties of Nearby Late-Type Galaxies.I. The Data
• Optical-to-virial velocity ratios of local disk galaxies from combined kinematics and galaxy-galaxy lensing
• The GALEX Arecibo SDSS Survey V: The Relation between the HI Content of Galaxies and Metal Enrichment at their Outskirts
• A new scaling relation for HII regions in spiral galaxies: unveiling the true nature of the mass-metallicity relation
• Metal Transport to the Gaseous Outskirts of Galaxies
• On the maximum value of the cosmic abundance of oxygen and the oxygen yield
• The Origin of the Mass-Metallicity relation: an analytical approach
• 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
• Abundance determinations in HII regions: model fitting versus Te-method
• On the surface density of dark matter haloes
• The Abundance Properties of Nearby Late-Type Galaxies. \\ II. The Relation between Abundance Distributions and Surface Brightness Profiles
• Formation of disk galaxies in preheated media: a preventative feedback model
• Understanding chemical evolution in resolved galaxies -- I The local star fraction-metallicity relation
• Disentangling the dark matter halo from the stellar halo
• The metallicity - redshift relations for emission-line SDSS galaxies: examination of the dependence on the star formation rate
• Shrinking Galaxy Disks with Fountain-Driven Accretion from the Halo
• The chemical case for no winds in dwarf irregular galaxies
• Outer regions of the merging system Arp 270

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