Mathematics – Logic
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phdt........12h&link_type=abstract
Thesis (PH.D.)--BRIGHAM YOUNG UNIVERSITY, 1995.Source: Dissertation Abstracts International, Volume: 56-07, Section: B, page: 38
Mathematics
Logic
Scientific paper
Bessel BVRI photometric information is presented for 961 galaxies and 384 stars from the central 1 Mpc of six rich Abell clusters. These clusters are Abell 576, 957, 1185, 1377, 2063 and 2657. Each object was examined with two fitting functions and an asymptotic magnitude was determined. One fitting function produces a shape parameter beta which, when taken in combination with the color index (B-I), shows a breakdown of the three basic morphological types (E, S0, and S) into six beta-types. In addition, the beta parameter provides a method of star-galaxy separation which was 96% efficient. The breakdown of the galaxies into six beta-types provides a probe into the nature of the rich Abell clusters. Examinations of luminosity functions, overall color indices, and counts of the various beta-types show differences in the clusters based on their Rood-Sastry type. These differences may provide clues to the underlying physics for the creation and evolution of these clusters.
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