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D. Carter | Semantic Scholar

Measurements of the Cosmological Parameters Ω and Λ from the First Seven Supernovae at z ≥ 0.35

We have developed a technique to systematically discover and study high-redshift supernovae that can be used to measure the cosmological parameters. We report here results based on the initial seven…

The dynamics and structure of rich clusters of galaxies. I : Velocity data

An extensive spectroscopic study of 10 rich southern X-ray clusters of galaxies is presented. Between 40 and 200 redshifts have been obtained in the field of each of the clusters, which cover a wide…

Evidence for systematic evolution in the properties of galaxies in distant clusters

This paper investigates the evolution of galaxies as a function of look-back time, primarily using early-type galaxies in rich cluster environments. We demonstrate that, by selecting distant galaxies…

A dynamical study of the Draco dwarf spheroidal galaxy

We have observed 19 giant stars in the Draco dwarf spheroidal (dSph) galaxy and obtained good quality spectra for 17 of these. The velocity dispersion of the sample, calculated by the…

Planetary nebula velocities in the disc and bulge of M31

We present radial velocities for a sample of 723 planetary nebulae in the disc and bulge of M31, measured using the WYFFOS fibre spectrograph on the William Herschel Telescope. Velocities are…

Spectra of shell ellipticals: redshifts, velocity dispersions and evidence for recent nuclear star formation

Nuclear spectra have been obtained for 100 of the 137 galaxies in the Malin & Carter catalogue. The objects were selected purely on the grounds of position on the sky. Redshifts are presented for…