NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-23 T17:54:31 PDT
Help | Comment | NED Home

For refcode 1995ApJ...438..527G:
Retrieve 90 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1995ApJ...438..527G OPTICAL RADII OF GALAXY CLUSTERS M. GIRARDI, A. BIVIANO, G. GIURICIN, F. MARDIROSSIAN, AND M. MEZZETTI Received 1994 February 22; accepted 1994 July 5 ABSTRACT We analyze the density profiles and virial radii for a sample of 90 nearby clusters, using galaxies with available redshifts and positions. Each cluster has at least 20 redshifts measured within an Abell radius, and all the results come from galaxy sets of at least 20 members. Most of the density profiles of our clusters are well fitted by hydrostatic isothermal-like profiles. The slopes we find for many cluster density profiles are consistent with the hypothesis that the galaxies are in equilibrium with the binding cluster potential. The virial radii correlate with the core radii at a very high significance level. The observed relationship between the two size estimates is in agreement with the theoretical one computed by using the median values of the density profile parameters fitted on our clusters. After correcting for incompleteness in our cluster sample, we provide the universal distribution functions of core and virial radii (obtained within half an Abell radius). Subject headings: galaxies: clusters: general
Retrieve 90 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home