Published in 1971, ApJ, 170, 193-198


REDSHIFTS AND ABSOLUTE SPECTRAL ENERGY DISTRIBUTIONS OF GALAXIES IN DISTANT CLUSTERS

J. B. Oke


Hale Observatories, California Institute of Technology, Carnegie Institution of Washington


Abstract. Absolute spectral energy distributions have been obtained for galaxies in three distant clusters. Comparison with the energy distribution of the integrated light from nearby giant elliptical galaxies yields redshifts and information concerning evolutionary effects. The Hydra cluster (0855+0321) gives the known result that z = 0.20. A galaxy in the cluster (0024+1654) yields z = 0.38, and the absorption spectrum of 3C 295 gives z = 0.46 which agrees with Minkowski's redshift. All have errors of ±0.01. The energy distributions for these galaxies show no evidence within the accuracy of the data for any evolution during the last 3 to 6 billion years. There is a suggestion that below 2800 Å the spectral energy distribution for 3C 295 may flatten in a fashion analogous to that observed in nearby galaxies with OAO-2.


Table of Contents

INTRODUCTION

OBSERVATIONS

DISCUSSION

K-CORRECTIONS

REFERENCES

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