Computer Science
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aipc..336..221b&link_type=abstract
Dark matter. AIP Conference Proceedings, Volume 336, pp. 221-230 (1995).
Computer Science
Kinematics, Dynamics, And Rotation, Galaxy Clusters
Scientific paper
Eighteen of the 23 MKW and AWM poor clusters now have 10 or more measured redshifts within 1.5h-1 Mpc of the central galaxy; 11 clusters have at least 20 measured redshifts. Based on the 21 clusters for which we have sufficient velocity information, the median velocity scale is 336 km s-1, a factor of two smaller than found for rich clusters. Several of the poor clusters exhibit complex velocity distributions due to the presence of nearby clumps of galaxies. We check on the velocity of the dominant galaxy in each poor cluster relative to the remaining cluster members. Significantly high relative velocities of the dominant galaxy are found in only 4 of 21 poor clusters, 3 of which we suspect are due to contamination of the parent velocity distribution. Several statistical tests indicate that the D/cD galaxies are at the kinematic centers of the parent poor cluster velocity distributions. Mass-to-light ratios for the 13 of the 15 poor clusters for which we have the required data are in the range 50<=M/LB(0)<=200 Msolar/Lsolar.
Beers Timothy C.
Bird Christina M.
Huchra John P.
Kriessler Jeffrey R.
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