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arXiv:astro-ph/9610138 (astro-ph)
[Submitted on 17 Oct 1996]

Title:The Surface Density Profiles and Lensing Characteristics of Hickson's Compact Groups of Galaxies

Authors:M. L. Montoya, R. Dominguez-Tenreiro, G. Gonzalez-Casado, G. A. Mamon, E. Salvador-Sole
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Abstract: A statistical method is developed to infer the typical density profiles of poor galaxy systems without resort to binning of data or assuming a given center to each system. The method is applied to the accordant redshift quartets in Hickson's compact groups (HCGs). The distribution of separations in these groups is consistent with a unique generalized modified Hubble surface density profile, with best-fit asymptotic slope beta = 1.4 and core radius R_c = 18 h^{-1} kpc, although a King profile (beta = 1) is also consistent with the data (with R_c = 6 h^{-1} kpc). These distributions are more concentrated than what has been previously determined for these groups. HCGs are unlikely to act as strong gravitational lenses, but analogous systems 5 to 10 times more distant should produce a non-negligible fraction of giant arcs.
Comments: ApJL in press. 12 pages, incl. 1 table and 2 figures. LaTeX, uses aaspp4
Subjects: Astrophysics (astro-ph)
Report number: UAM-FT/96-42
Cite as: arXiv:astro-ph/9610138
  (or arXiv:astro-ph/9610138v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/9610138
Journal reference: Astrophys.J. 473 (1996) L83
Related DOI: https://doi.org/10.1086/310393

Submission history

From: Gary Mamon [view email]
[v1] Thu, 17 Oct 1996 11:30:03 UTC (30 KB)
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