NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-21 T11:01:47 PDT
Help | Comment | NED Home

For refcode 1992AJ....103.1721R:
Retrieve 103 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1992AJ....103.1721R THE ELONGATION OF ABELL CLUSTERS. III. RICH CLUSTERS AND INITIAL CONDITIONS GEORGE RHEE New Mexico State University, Department of Astronomy, Box 30001/Department 4500, Las Cruces, New Mexico 88003 MICHAEL VAN HAARLEM AND PETER KATGERT Leiden Observatory, Postbus 9513, 2300 RA Leiden, The Netherlands Received 31 October 1991; revised 13 February 1992 ABSTRACT We present the results of a study of the elongation and orientation of a sample of 107 rich clusters of galaxies. The data consist of galaxy lists derived from digitised images of the Palomar Sky Survey red plate copies. We work with three measures of the cluster orientation (1) the cluster position angle derived from the Fourier transform of the azimuthal galaxy distribution, (2) the first-ranked galaxy position angle derived from the moments of the digitized galaxy image, and (3) the cluster position angle derived from the x-ray surface brightness distribution [Einstein data]. We have examined the orientation of clusters with respect to their nearest neighbors as a function of distance to the nearest neighbor. The orientation of clusters with respect to members of the same supercluster has also been examined. We find that alignment effects are present for clusters residing in superclusters. We also find that cD galaxies are significantly aligned with the direction to the nearest neighbor cluster. These results are discussed in the context of current ideas on galaxy formation.
Retrieve 103 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home