The Ursa Major Supercluster of Galaxies: I. The Luminosity Function

Details The Ursa Major Supercluster of Galaxies: I. The Luminosity Function The Ursa Major Supercluster of Galaxies: I. The Luminosity Function

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001astl...27..140k&link_type=abstract

Astronomy Letters, vol. 27, p. 140-149 (2001)

Astronomy and Astrophysics

Astronomy

3

Galaxies, Groups And Clusters Of Galaxies

Scientific paper

Catalogs of bright galaxies in the central regions of 11 clusters in the Ursa Major supercluster are presented. Absolute and relative coordinates and total B and R magnitudes are given for each galaxy. Plates taken with the 2-m Tautenburg Observatory telescope and CCD images obtained with the 6-m and 1-m SAO telescopes are used. The luminosity functions (LFs) for galaxies in the cluster nuclei (3 Mpc x 3 Mpc) and the composite LF for the supercluster are constructed. The composite LF is well fitted by a Schechter function with M_B^* = - 20.91 mag, alpha = -1.02 and with M_R^* = - 22.39 mag, alpha = -1.06. A comparison with the LFs of field galaxies and of various samples of clusters and superclusters shows that the Ursa Major supercluster have LF parameters characteristic of the field and, thus, differ from those of the Corona Borealis supercluster, which is apparently at a later stage of dynamical evolution.

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