Properties of groups of galaxies depend sensitively on the algorithm for group selection, and even the most recent catalogs of groups built from redshiftspace selection should suffer from projections and inclusion of infalling galaxies. The cosmo-dynamical evolution of groups from initial Hubble expansion to collapse and virialization leads to a fundamental track in virial-theorem estimated M/L vs crossing time.
CITATION STYLE
Mamon, G. A. (2007). Groups of Galaxies in the Nearby Universe. In I. Saviane, V. D. Ivanov, & J. Borissova (Eds.), Groups of Galaxies in the Nearby Universe (p. 203). Berlin, Heidelberg: Springer Berlin Heidelberg. Retrieved from http://adsabs.harvard.edu/abs/2007ggnu.conf..203M
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