Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..606c&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, April 15, 1991, p. 606-628.
Astronomy and Astrophysics
Astronomy
88
Astronomical Catalogs, Galactic Clusters, Astronomical Models, Astronomical Photography, Astronomical Spectroscopy, Red Shift, Southern Sky
Scientific paper
The suitability of high-contrast derivatives of AAT prime focus plates for finding distant galaxy clusters are tested by comparing object catalogs found by eye on these films with those determined by measuring machine photometry of the original plates. Utilizing a selection of 55 AAT films with sky-limiting exposures and reasonable seeing, 112 faint cluster candidates are tabulated that are identified by the application of a simple contrast criterion, which measures the cluster excess within a 3 arcmin diameter against the rms variation in the background field on the same film. Assuming no evolution in galaxy properties or comoving cluster number densities, simulations predict about the observed number of F clusters above the completeness limit, but too few J clusters are predicted by a significant margin.
Couch Warrick J.
Ellis Richard S.
MacLaren Iain
Malin David F.
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