The Study of Nebular Emission on Nearby Spiral Galaxies in the IFU Era
Figure 6
Radial oxygen abundance density distribution for the whole HII region spectroscopic sample discussed in the text. The first contour indicates the mean density, with a regular spacing of four times this value for each consecutive contour. The light-blue solid circles indicate the mean value (plus errors) for each consecutive radial bin of ~. The average error of the derived oxygen abundance is shown by a single error bar located at the top-right side of the panel. The solid-orange square indicates the average abundance of the solar neighbourhood, at the distance of the Sun to the Milky-Way galactic center. The lines represent linear fits to all galaxies (black) and all HII regions (dotted red) independently, showing a universal slope ~−0.1 dex/. Figure is adapted from Rosales-Ortega et al. [38].
