Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-06-18
Astronomy and Astrophysics
Astrophysics
27 pages, 16 figures, 6 tables, accepted for pubblication on MNRAS
Scientific paper
10.1111/j.1365-2966.2008.13566.x
Photometry and long-slit spectroscopy are presented for 14 S0 and spiral galaxies of the Fornax, Eridanus and Pegasus cluster, and NGC 7582 group. The structural parameters of the galaxies are derived from the R-band images by performing a two-dimensional photometric decomposition of the surface-brightness distribution. This is assumed to be the sum of the contribution of a bulge and disc component characterized by elliptical and concentric isophotes with constant (but possibly different) ellipticity and position angles. The rotation curves and velocity dispersion profiles are measured from the spectra obtained along the major axis of galaxies. The radial profiles of the Hb, Mg, and Fe line-strength indices are presented too. Correlations between the central values of Mgd,
Bertola Francesco
Coccato Lodovico
Corsini Enrico Maria
Mendez-Abreu Jairo
Morelli Lorenzo
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