1998/09/28 by M. Scodeggio, Marco Scodeggio, R. Giovanelli +3 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Dispersion (optics) #Fundamental plane (elliptical galaxies) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Lambda #Redshift #Scientific Research and Discoveries #Universality (dynamical systems) #Velocity dispersion #astro-ph
paper · pdf · doi:10.1086/300640
12 pages, 5 tables, 3 figures, to appear in AJ. Note that tables 2 and 3 are in separate files, as they should be printed in landscape format
arxiv created 1998/09/28 · openalex publication_date 1998/12/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present central velocity dispersion measurements for 325 early-type galaxies in eight clusters and groups of galaxies, including new observations for 212 galaxies. The clusters and groups are the A262, A1367, Coma (A1656), A2634, Cancer, and Pegasus Clusters and the NGC 383 and NGC 507 Groups. The new measurements were derived from medium-dispersion spectra that cover 600 Å centered on the Mg I b triplet at λ ∼ 5175 Å. Velocity dispersions were measured using the Tonry & Davis cross-correlation method, with a typical accuracy of 6%. A detailed comparison with other data sources is made.