Radius-parameter and surface brightness as a function of a galaxy total magnitude for cluster of galaxies.
Mean relations for the run of radius-parameter and central surface brightness with absolute magnitude are presented for E--SO galaxies in the cores of Abell clusters 754, 1367, and 2065. These data are combined with the adjusted results of Fish (1964) for E galaxies in the Virgo cluster, Holmberg (1969) for nearby E- SO galaxies, and Brookes and Rood (1971) for E galaxies in cluster 1656 to show that the mean relations may differ significantly between clusters. No clear connection with cluster classification is evident. In all clusters, it appears that the fainter galaxies have been tidally distended. The use of the radius--parameter versus magnitude diagram as a relative-distance indicator suggests that redshift is not a good distance indicator for the Virgo cluster, giving a substantial peculiar velocity, and gives support to Abell's cluster fitting method. The central surface brightnesses of first-ranked cluster galaxies exhibit a scatter (m.e.) of about 0.8 mag about the average. These last two results are in disagreement with recent findings by Sandage.
- Research Organization:
- Univ. of California, Los Angeles
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-29-027538
- OSTI ID:
- 4307317
- Journal Information:
- The Astronomical Journal, Journal Name: The Astronomical Journal Vol. 78; ISSN 0004-6256
- Publisher:
- American Institute of Physics
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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