Oxygen abundance as a function of the radius derived from Pettini & Pagel (2004) N2 indicator (top panel), metallicity gradient as a function of stellar mass (middle panel), and metallicity gradient as a function of sSFR (bottom panel). The blue line represents the oxygen abundance derived from the integrated spectrum. The gray lines indicate a value for the metallicity gradient of zero and the orange line is the relation obtained by Stott et al. (2014) from the combination of their data, Rupke et al. (2010), Swinbank et al. (2012), and Queyrel et al. (2012). We include the samples of Swinbank et al. (2012), Stott et al. (2014), and Wuyts et al. (2016) for comparison.
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