Gravitational lens models of arcs in clusters

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168359· OSTI ID:7135241

Bergmann, A G; Petrosian, V; Lynds, R ^[1]

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1. Stanford Univ., CA (USA) Kitt Peak National Observatory, Tucson, AZ (USA)

It is now well established that the luminous arcs discovered in clusters of galaxies, in particular those in Abell 370 and Cluster 2244-02, are produced by gravitational lensing of background sources. The arcs are modeled and constraints are placed on the distribution of the mass in the clusters and the shape and size of the sources. The models require, as expected, a large amount of dark matter in the clusters and a mass-to blue-light ratio for the cluster which exceeds 100 solar mass/solar luminosity and could be as high as 1000 solar mass/solar luminosity depending on cosmological parameters and the distribution of the dark matter. Furthermore, it is found that in the case of the arc in A370 the dark matter must have a different distribution than the luminous galaxies, while for the arc in Cl 2244 the dark matter can have a distribution similar to that of the light matter (galaxies) or a separate distribution. 30 refs.

• OSTI ID: 7135241
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 350; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTRIBUTION
GALAXY CLUSTERS
GRAVITATIONAL LENSES
LENSES
MASS
MASS DISTRIBUTION
MATHEMATICAL MODELS
MORPHOLOGY
NONLUMINOUS MATTER
SPATIAL DISTRIBUTION