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Title:
Gravitationally lensed images in Abell 370
Authors:
Grossman, Scott A.; Narayan, Ramesh
Affiliation:
AA(Steward Observatory, Tucson, AZ), AB(Steward Observatory, Tucson, AZ)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 344, Sept. 15, 1989, p. 637-644. (ApJ Homepage)
Publication Date:
09/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Dark Matter, Galactic Clusters, Gravitational Lenses, Astronomical Models, Density Distribution, Mass To Light Ratios
DOI:
10.1086/167831
Bibliographic Code:
1989ApJ...344..637G

Abstract

Several blue arclike images have been found in the galaxy cluster A370, some up to 1 arcmin from the cluster center. It is shown here that gravitational lensing can account for the positions and lengths of the observed arcs without having to resort to any extreme or peculiar cluster mass distribution, provided there is a significant amount of dark matter in the cluster. The constraints that can be placed on the core radius and ellipticity of the cluster and on the redshifts of the background galaxies are discussed.

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