Extensive spectroscopic studies of stars with and without planets have concluded that stars hosting planets are significantly more metal-rich than those without planets. More subtle trends of different chemical elements begin to appear as the number of detected extrasolar planetary systems continues to grow. I review our current knowledge

We explore possible correlations between light profile shapes, as parameterized by the Sérsic index n or the concentration index Cre(1/3), and relevant stellar population parameters in early-type galaxies. Mean luminosity-weighted ages, metallicities, and abundance ratios were obtained from spectra of very high signal-to-noise ratio and stellar

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