Image Details
Caption: Figure 7.
Metallicity gradients for each galaxy in our sample based on the use of various strong-line diagnostics. N2, O3N2, and O3HB are as presented in Figure 5, and we use the calibrations of Pettini & Pagel (2004; PP04) and Maiolino et al. (2008; M+08). The solid lines show the gradient from Figure 6 and dotted lines are the best fits to the other diagnostics. For J0744 and J1206, we estimate Hβ from Hα with the global Hα/Hβ ratio. In nearly all cases the gradients are approximately equal to or stronger than the adopted value (N2, PP04). The exceptions are the [O iii]-based results for J0744 which suggest a flat or inverted gradient, although all slopes are within 2σ of the adopted value.
© 2013. The American Astronomical Society. All rights reserved.