Compact groups of galaxies and large-scale structure

Details Compact groups of galaxies and large-scale structure Compact groups of galaxies and large-scale structure

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405..413p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 2, p. 413-418.

Other

12

Cosmology, Galactic Clusters, Astronomical Catalogs, Radial Velocity

Scientific paper

The relative orientation of a homogeneous sample of 92 compact groups of galaxies taken from Hickson's catalog is investigated. No evidence is found for these groups of galaxies to be aligned with either their nearest neighbors or with Abell clusters. However, a weak indication of alignment is found for groups connected in large structures such as 'chains' and/or 'filaments'. Two concentrations are found: one of 17 groups extends for 93/h Mpc, the other of 15 groups for 83/h Mpc. Both have an average recession velocity of about 6300 km/s. The alignment of the groups in the concentrations may be suggestive of a real effect. This result supports the argument that group orientations reflect their origin in chainlike or filamentary protosuperclusters.

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