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Paper: Observational Evidence of Secular Evolution in Barred Galaxies
Volume: 396, Formation and Evolution of Galaxy Disks
Page: 375
Authors: Pérez, I.; Sánchez-Blázquez, P.; Zurita, A.
Abstract: We report preliminary results of the derived stellar population metallicities and ages along the bars of a sample of 20 barred galaxies. We find that some galaxies show a positive radial bar metallicity gradient, implying that there has been a chemical enrichment and so that the star formation has lasted for a long time. This fact indicates that some bars are long lived. The radial negative metallicity gradient found along the bar of some of the galaxies possibly reflects the original disk gradient. The metallicity gradient seems to be correlated with the central stellar velocity dispersion, with positive metallicity gradient being found in galaxies with higher central velocity dispersion.
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