SIMBAD references

2016MNRAS.458.1529B - Mon. Not. R. Astron. Soc., 458, 1529-1547 (2016/May-2)

A recalibration of strong-line oxygen abundance diagnostics via the direct method and implications for the high-redshift universe.


Abstract (from CDS):

We use direct method oxygen abundances in combination with strong optical emission lines, stellar masses (M*), and star formation rates (SFRs) to recalibrate the N2, O3N2, and N2O2 oxygen abundance diagnostics. We stack spectra of ∼200 000 star-forming galaxies from the Sloan Digital Sky Survey in bins of M* and SFR offset from the star-forming main sequence () to measure the weak emission lines needed to apply the direct method. All three new calibrations are reliable to within ±0.10 dex from log (M*/M) ∼ 7.5-10.5 and up to at least 200 M/yr in SFR. The N2O2 diagnostic is the least subject to systematic biases. We apply the diagnostics to galaxies in the local Universe and investigate the M*-Z-SFR relation. The N2 and O3N2 diagnostics suggest the SFR dependence of the M*-Z-SFR relation varies with both M* and , whereas the N2O2 diagnostic suggests a nearly constant dependence on SFR. We apply our calibrations to a sample of high-redshift galaxies from the literature, and find them to be metal-poor relative to local galaxies with similar M* and SFR. The calibrations do reproduce direct method abundances of the local analogues. We conclude that the M*-Z-SFR relation evolves with redshift.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): ISM: abundances - galaxies: abundances - galaxies: active - galaxies: evolution - galaxies: ISM

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

CDS comments: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Simbad objects: 1

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