%0 Generic %1 brown2016recalibration %A Brown, Jonathan S. %A Martini, Paul %A Andrews, Brett H. %D 2016 %K calibration evolution metallicity redshift %T A Recalibration of Strong Line Oxygen Abundance Diagnostics via the Direct Method and Implications for the High Redshift Universe %U http://arxiv.org/abs/1602.01087 %X We use direct method oxygen abundances in combination with strong optical emission lines, stellar masses ($M_\star$), and star formation rates (SFRs) to recalibrate the N2, O3N2, and N2O2 oxygen abundance diagnostics. We stack spectra of $\sim$200,000 star-forming galaxies from the Sloan Digital Sky Survey in bins of $M_\star$ 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 $łog(M_\star/M_ødot) 7.5 - 10.5$ and up to at least $200~M_ødot$ yr$^-1$ 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 $M_\star$-$Z$-$SFR$ relation. The N2 and O3N2 diagnostics suggest the SFR dependence of the $M_\star$-$Z$-$SFR$ relation varies with both $M_\star$ and $\Delta łog(SSFR)$, 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 $M_\star$ and SFR. The calibrations do reproduce direct method abundances of the local analogs. We conclude that the $M_\star$-$Z$-$SFR$ relation evolves with redshift.

@misc{brown2016recalibration, abstract = {We use direct method oxygen abundances in combination with strong optical emission lines, stellar masses ($M_{\star}$), and star formation rates (SFRs) to recalibrate the N2, O3N2, and N2O2 oxygen abundance diagnostics. We stack spectra of $\sim$200,000 star-forming galaxies from the Sloan Digital Sky Survey in bins of $M_{\star}$ 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 $\pm 0.10$ dex from $\log(M_{\star}/M_{\odot}) \sim 7.5 - 10.5$ and up to at least $200~M_{\odot}$ yr$^{-1}$ 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 $M_{\star}$-$Z$-${\rm SFR}$ relation. The N2 and O3N2 diagnostics suggest the SFR dependence of the $M_{\star}$-$Z$-${\rm SFR}$ relation varies with both $M_{\star}$ and $\Delta \log(SSFR)$, 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 $M_{\star}$ and SFR. The calibrations do reproduce direct method abundances of the local analogs. We conclude that the $M_{\star}$-$Z$-${\rm SFR}$ relation evolves with redshift.}, added-at = {2016-02-04T09:53:51.000+0100}, author = {Brown, Jonathan S. and Martini, Paul and Andrews, Brett H.}, biburl = {https://www.bibsonomy.org/bibtex/20d3dfebb3413f4307eb04990e1e2bf19/miki}, description = {[1602.01087] A Recalibration of Strong Line Oxygen Abundance Diagnostics via the Direct Method and Implications for the High Redshift Universe}, interhash = {c017d6c00e061ade81fa9716ac0075c2}, intrahash = {0d3dfebb3413f4307eb04990e1e2bf19}, keywords = {calibration evolution metallicity redshift}, note = {cite arxiv:1602.01087Comment: 21 pages, 14 figures. Resubmitted to MNRAS. For a brief video explaining this paper, see https://www.youtube.com/watch?v=OpoeguZi2X4}, timestamp = {2016-02-04T09:53:51.000+0100}, title = {A Recalibration of Strong Line Oxygen Abundance Diagnostics via the Direct Method and Implications for the High Redshift Universe}, url = {http://arxiv.org/abs/1602.01087}, year = 2016 }