Stellar population solution of pPXF from the full spectral fitting procedure in four regions along the minor axis of NGC 4710. The upper panel shows the mean metallicity of the bulge of NGC 4710 at different distances from the plane (Z) indicated with black filled circles. Mean metallicity measurements for the bulge of the Milky Way are overplotted. The photometric measurements from Gonzalez et al. (2013) are shown with red solid lines, while the spectroscopic measurements from Zoccali et al. (2008) and Johnson et al. (2013) are indicated with empty red circles. The two lower panels show the observed (black solid line) and best-fit spectrum (red solid line) of the inner and outermost regions of the bulge of NGC 4710, the masked emission line regions (blue solid lines), and the fitting residuals (green).
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