The 0.6 MPC halo of the cD galaxy (MCG 05-33-002) in the cluster Abell 3571 revealed by the co-addition of eight Schmidt plates

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photography, Galactic Clusters, Interacting Galaxies, Schmidt Telescopes, Baryons, Luminosity, Mass To Light Ratios, Photographic Plates

Scientific paper

Eight IIIaJ sky-limited plates of the same field taken with the UK 1.2-m Schmidt telescope have been scanned by the APM machine and digitally co-added. The field contains the cD galaxy MCG 05-33-002, the central galaxy in the cluster A3571. A giant faint halo, of dimensions about 600 x 200 kpc, has been found to envelop most of the cluster. It is estimated that at least a mass of 2 x 10 to the 12th solar masses is contained within the halo, which would account for some of the 'missing' mass in such clusters in terms of purely luminous baryonic matter.

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