Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.259..233s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 259, no. 2, p. 233-246.
Astronomy and Astrophysics
Astronomy
37
Astronomical Catalogs, Galactic Clusters, Galactic Mass, Luminosity, Radial Velocity, Astronomical Photometry, Astronomical Spectroscopy
Scientific paper
Results of photometric and spectroscopic observations of the cluster of galaxies SC2008-57 (A3667) are presented. The cluster is classified as type L because its galaxy distribution is highly flattened. It shows two strong concentrations: a main concentration, centered on the cluster brightest galaxy (a D galaxy) and coincident with the peak of X-ray emission, and a substructure around the second brightest galaxy (also a D galaxy). The extreme flattening of the cluster may be at least partially due to the presence of the substructure. The cluster also exhibits evidence for luminosity segregation, with the brightest galaxies being preferentially found in high galaxy density regions. From the fact that most of the luminosity segregation is produced by galaxies associated with the two clumps around the D galaxies, it is inferred that dynamical friction is effective in subclusters with low velocity dispersion and may be associated with the formation of D galaxies.
Capelato Hugo V.
Mazure Alain
Proust Dominique
Sodre Laerte Jr.
Steiner Joao Evangelista
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