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Fig. 2

image

SDSS spectrum of one galaxy (Alfalfa 240255) from the SDSS survey with our best pPXF fit based on the Gauss-Hermite moments overplotted in red. The masked emission regions are shown in blue and the residuals are plotted in green. The S/N is 35 and approximately represents the mean value of the S/N of the galaxies in our sample. The best-fitting parameters are σGH = 120.6kms-1, and and the morphological type is Sab. The best pPXF fit was obtained using the Elodie empirical stellar library, and the quality of the fit is . The redshift of the galaxy is indicated in the lower right part of the figure, although the spectrum of the galaxy is deredshifted.

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