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Metallicity gradients in local field star-forming galaxies: Insights on inflows, outflows, and the coevolution of gas, stars and metals

Ho, I-Ting; Kudritzki, Rolf-Peter; Kewley, Lisa; Zahid, H.Jabran; Dopita, Michael; Bresolin, F; Rupke, D


We present metallicity gradients in 49 local field star-forming galaxies. We derive gasphase oxygen abundances using two widely adopted metallicity calibrations based on the [O III]/Hβ, [NII]/Hα, and [N II]/[O II] line ratios. The two derived metallicity gradients are usually in good agreement within ±0.14 dexR25 -1 (R25 is the B-band iso-photoal radius), but the metallicity gradients can differ significantly when the ionization parameters change systematically with radius. We investigate the...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stv067
Access Rights: Open Access


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