On velocity dispersions of galaxies in rich clusters

Details On velocity dispersions of galaxies in rich clusters On velocity dispersions of galaxies in rich clusters

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....82..322d&link_type=abstract

Astronomy and Astrophysics, vol. 82, no. 3, Feb. 1980, p. 322-327. Research supported by the Consiglio Nazionale delle Ricerche

Astronomy and Astrophysics

Astrophysics

301

Galactic Clusters, Radial Velocity, Velocity Distribution, Error Analysis, Mean, Red Shift

Scientific paper

We discuss the problem of evaluating the mean redshifts and the velocity dispersions of rich clusters on the basis of restricted samples of radial velocities. We describe a procedure for evaluating at any significance level the global uncertainty resulting from sampling errors, experimental errors, and errors in the projection factors. Using this procedure we have computed with their 68% confidence uncertainties, the mean redshifts and the velocity dispersions of 43 rich clusters. A strong indication that the velocity dispersion is correlated with the richness of the cluster comes out of our analysis.

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