The Study of Nebular Emission on Nearby Spiral Galaxies in the IFU Era
Figure 8
(a) 3D representation of the local -Z-EW(H) relation. The size and color scaling of the data points are linked to the value of (i.e. low-blue to high-red values). The projection of the data over any pair of axes reduces to the local -Z, -EW(H), and metallicity-EW(H) relations. An online 3D animated version is available at http://tinyurl.com/local-mass-metallicity. (b) Distribution of simulated galaxies in the -Z plane assuming a local -Z relation and considering the aperture effect of the SDSS fiber, as explained in the text. The contours correspond to the density of points, while the circles represent the mean value (plus 1 error bars) in bins of 0.15 dex. The black line stands for the [42] fitting, while the blue lines correspond to the Kewley and Ellison [45] 0.2 dex relation. The rectangle encompasses the range in mass and metallicity of the galaxy sample. Figure is adapted from Rosales-Ortega et al. [38].
