Morphology of low-redshift compact galaxy clusters I. Shapes and radial profiles

Details Morphology of low-redshift compact galaxy clusters I. Shapes and radial profiles Morphology of low-redshift compact galaxy clusters I. Shapes and radial profiles

2005-02-03

arxiv.org/abs/astro-ph/0502062v1

Mon.Not.Roy.Astron.Soc. 359 (2005) 191-210

Astronomy and Astrophysics

Astrophysics

23 pages, 17 figures, accepted for publication in MNRAS. Full paper including full resolution figures 2 and 9 at http://www.

Scientific paper

10.1111/j.1365-2966.2005.08880.x

The morphology of clusters of galaxies may be described with a set of parameters which contain information about the formation and evolutionary history of these systems. In this paper we present a preliminary study of the morphological parameters of a sample of 28 compact Abell clusters extracted from DPOSS data. The morphology of galaxy clusters is parameterized by their apparent ellipticity, position angle of the major axis, centre coordinates, core radius and beta-model power law index. Our procedure provides estimates of these parameters by simultaneously fitting them all, overcoming some of the difficulties induced by sparse data and low number statistics typical of this kind of analysis. The cluster parameters were fitted in a 3 x 3 h^-2 sqMpc region, measuring the background in a 2

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