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For refcode 1990ApJ...352..457M:
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Copyright by American Astronomical Society. Reproduced by permission
1990ApJ...352..457M ON THE PROPERTIES OF GALAXIES IN GROUPS M. A. G. MAIA AND L. NICOLACI DA COSTA Departamento de Astronomia CNPq/Observatorio Nacional Received 1989 May 1; accepted 1989 October 2 ABSTRACT We make use of the recently compiled catalog of groups of galaxies in the southern hemisphere to examine properties of galaxies in loose groups. Several statistical tests are applied to the data to evaluate the possible role of physical processes, which could influence the evolution of the individual members and explain the present-day structure of the galaxies. Among the properties examined are the relations morphology-density and morphology-velocity dispersion, the level of H{alpha} emission, and the size of first-ranked galaxies. When selection effects in the observed sample are properly taken into account, we find no strong evidence that would indicate the presence of evolutionary processes expected to occur in virial equilibrium systems. Subject headings: galaxies: clustering - galaxies: evolution - galaxies: structure
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