Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.313..469s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 313, Issue 3, pp. 469-490.
Astronomy and Astrophysics
Astronomy
93
Galaxies: Clusters: General, Galaxies: Distances And Redshifts, Galaxies: Elliptical And Lenticular, Cd, Cosmology: Observations, Large-Scale Structure Of Universe
Scientific paper
We present new spectroscopic data for 532 early-type galaxies, predominantly Abell cluster members with cz<12000kms-1. We tabulate 919 individual measurements, from six observing runs, for recession velocity, cz, central velocity dispersion, σ, and magnesium line-strength indices, Mg2 and Mgb. The median estimated error, per measurement, in σ is 5 per cent. The Mg2 line-strength data have median errors of 0.009mag. The observed scatter between repeat measurements is largely accounted for by photon-counting errors. These data will be employed in forthcoming papers, where they will form part of a merged and standardized catalogue of Fundamental Plane data for use in cluster distance estimates and peculiar velocity analyses.
Davies Roger L.
Hudson Michael J.
Lucey John R.
Schlegel David James
Smith Jeffrey R.
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