Formation and distortion of optical rings around rich cluster galaxies

Details Formation and distortion of optical rings around rich cluster galaxies Formation and distortion of optical rings around rich cluster galaxies

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...375..492k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 375, July 10, 1991, p. 492-498. Research supported by University of Califor

Biology

Quantitative Biology

Quantitative Methods

11

Galactic Clusters, Gravitational Lenses, Mass Distribution, Dark Matter, Galactic Mass, Red Shift

Scientific paper

Qualitative and semiquantitative methods of analyzing optical rings around cluster galaxies are presented. The formation and shape of rings formed by a combined galaxy-cluster potential is examined, and the probability for the formation of optical rings is discussed. How the distortion or the ring, or its absence, can be used to probe the distribution of the cluster dark matter and to limit the presence of large galactic size dark masses near the ring is addressed. Other image geometries which can arise due to the presence of a second galaxy are examined. The limitation of these simple methods are discussed and some more sophisticated approaches are outlined.

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