Objective prism radial velocities of cluster galaxies from UK Schmidt telescope plates

Details Objective prism radial velocities of cluster galaxies from UK Schmidt telescope plates Objective prism radial velocities of cluster galaxies from UK Schmidt telescope plates

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196..397c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 196, Aug. 1981, p. 397-402.

Astronomy and Astrophysics

Astronomy

16

Astronomical Spectroscopy, Galactic Clusters, Radial Velocity, Schmidt Telescopes, Velocity Measurement, Elliptical Galaxies, Prisms, Red Shift, Spectral Resolution

Scientific paper

Radial velocities for galaxies in the cluster Abell 2670 have been measured on an objective prism plate and compared with previously published velocities from slit spectra. These indicate that the prism velocities are accurate to approximately 1800 km/s. Similar velocities have been measured for the cluster of galaxies Abell 140, the results indicating a wider dispersion in velocities than would be expected for a single cluster. It is concluded that the technique is useful for determining the radial velocities of clusters, for testing the cluster membership of bright elliptical galaxies, and for resolving superimposed clusters.

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