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196 records were found.

Comment: 9 pages, 4 encapsulated postscript figures. Requires mn.sty, psfig.sty. Accepted for publication in MNRAS
Comment: 9 pages, 6 figures, to appear in MNRAS
Comment: 5 pages, 3 postscript figures included, proceedings of the IGRAP meeting "Clustering at high redshift", Marseille, June 1999
Comment: 8 Latex pages, macros, tables and 7 ps figures included, submitted to MNRAS in august 1996
Comment: 4 pages, 2 figures, uses REVTeX4 + emulateapj.cls and apjfonts.sty. Accepted by ApJL
Comment: For the Proceedings of "Galaxy Evolution: Theory and Observations", Cozumel, April 2002, Eds. V. Avila-Reese, C. Firmani, C. Frenk, & C. Allen, RevMexAA SC (2002)
Comment: 10 pages, 7 figures, accepted for publication in MNRAS
Comment: 4 pages, 1 figure; To appear in "AGN Physics with the Sloan Digital Sky Survey," eds. G.T. Richards and P.B. Hall
We have acquired intermediate resolution spectra in the 3700-7000 A wavelength range for a sample of 65 early-type galaxies predominantly located in low density environments, a large fraction of which show emission lines. The spectral coverage and the high quality of the spectra allowed us to derive Lick line-strength indices and to study their behavior at different galacto-centric distances. Ages, metallicities and element abundance ratios have been derived for the galaxy sample by comparison of the line-strength index data set with our new developed Simple Stellar Population (SSP) models. We have analyzed the behavior of the derived stellar population parameters with the central galaxy velocity dispersion and the local galaxy density in order to understand the role played by mass and environment on the evolution of early-type galax...
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