English

A Sample of Field Ellipticals

Astrophysics 2009-11-10 v1

Abstract

Using well-defined selection criteria applied to the LEDA galaxy catalogue we have constructed a sample of elliptical galaxies that can be taken to lie in the field. Such criteria can easily be applied to theoretical simulations for direct comparison with observations. The variation of the number of `isolated' ellipticals with selection criteria is also investigated. A preliminary study of the environment of the field ellipticals shows that, in the mean, they are surrounded by a population of dwarf galaxies, out to projected radii of at least 500 kpc, with a radial density profile of r0.6±0.2r^{-0.6\pm 0.2} and a luminosity function slope of α1.8\alpha \sim -1.8. The results are compared and contrasted to the satellite population around isolated spiral galaxies.

Keywords

Cite

@article{arxiv.astro-ph/0311599,
  title  = {A Sample of Field Ellipticals},
  author = {Rodney M. Smith and Vicent J. Martinez and Matthew J. Graham},
  journal= {arXiv preprint arXiv:astro-ph/0311599},
  year   = {2009}
}

Comments

12 pages including 3 figures and 1 table, aastex preprint style, submitted to ApJ

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