Dynamics of the poor clusters MKW 4 and AWM 4

Details Dynamics of the poor clusters MKW 4 and AWM 4 Dynamics of the poor clusters MKW 4 and AWM 4

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308...10m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 1, 1986, p. 10-22.

Astronomy and Astrophysics

Astrophysics

33

Galactic Clusters, Luminosity, Mass To Light Ratios, Radial Velocity, Red Shift, Astronomical Photometry, Dynamic Models, Galactic Evolution, Galactic Structure, Mass Distribution

Scientific paper

The authors have obtained redshifts and CCD photometry of nearly complete samples of galaxies within 1 Mpc of the centers of the Morgan poor clusters MKW 4 and AWM 4. These data are used to study the luminosity functions and the mass distributions of the clusters. For MKW 4 the authors have obtained a sufficient number of galaxy velocities (32) to construct a dynamical model for the cluster. Using the derived potential, they match the observed X-ray surface brightness profile if they allow for a weak cooling flow in the hot gas and if they take the mass distribution of the central galaxy into account. For AWM 4 no well-constrained models of the mass distribution could be obtained, but the best fitting models also give good agreement with X-ray data if a weak cooling flow in the hot gas is assumed.

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