Two blue arcs associated with the cD galaxy of Abell 963

Details Two blue arcs associated with the cD galaxy of Abell 963 Two blue arcs associated with the cD galaxy of Abell 963

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329l..21l&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 329, June 1, 1988, p. L21-L24.

Astronomy and Astrophysics

Astrophysics

52

Elliptical Galaxies, Galactic Clusters, Gravitational Lenses, Arcs, Astronomical Models, Color, Galactic Nuclei, Galactic Radiation

Scientific paper

Two blue arcs associated with the cD galaxy in Abell 963 have been found. They are different in physical length, angle subtended, and distance from the nucleus of the cD, are on opposite sides of the cD galaxy, and both arcs appear concentric about the nucleus. The arcs are patchy and extremely blue, having colors bluer than the bluest members of the Abell 963 cluster. The cD galaxy is highly elliptical, epsilon roughly 0.5, with one, possibly both arcs, being bisected by the major axis of the cD. It is suggested that the most likely mechanism for the origin of the arcs is gravitational lensing of a high-redshift galaxy by the cD galaxy and the associated cluster core.

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