Galaxy clusters - Dynamical times and brightest member magnitudes

Details Galaxy clusters - Dynamical times and brightest member magnitudes Galaxy clusters - Dynamical times and brightest member magnitudes

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...141..419g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 141, no. 2, Dec. 1984, p. 419-421. Research supported by the Consiglio Naziona

Astronomy and Astrophysics

Astrophysics

2

Astronomical Photometry, Galactic Clusters, Galactic Evolution, Luminosity, Magnitude, Regression Analysis, Statistical Correlation

Scientific paper

In contrast with earlier findings, the authors' analysis of the data of ≡30 galaxy clusters reveals no significant correlations between cluster dynamical time scales and the magnitude differences between the first- and second- (or third-) ranked cluster galaxies. This result can be regarded as an indication that the luminosity of the brightest cluster members, which are often thought to undergo considerable ongoing evolution, cannot be appreciably affected by evolutionary processes related to cluster dynamical time scales. Furthermore, unlike previous assertions, the authors find no correlation between the cluster virial radii and velocity dispersions.

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