Statistics – Computation
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94..571c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 94, Sept. 1987, p. 571-586.
Statistics
Computation
26
Galactic Clusters, Galactic Evolution, Galactic Mass, Mass To Light Ratios, Red Shift, X Ray Astronomy, Anisotropy, Computational Astrophysics, Elliptical Galaxies, Line Of Sight, Statistical Tests, Virial Theorem
Scientific paper
The authors have measured 44 new redshifts in A 999 and 40 in A 1016: these clusters are both "linear" according to Rood and Sastry (1971) and Struble and Rood (1982, 1984). With 20 cluster members in A 999 and 22 in A 1016, the authors can estimate the probability that these clusters are actually drawn from spherically symmetric distributions. By comparing the clusters with Monte Carlo King models, they find that A 999 is probably intrinsically spherically symmetric, but A 1016 is probably linear. The authors estimate that ⪆2% of a catalog of spherically symmetric clusters might be erroneously classified as linear. They use the data to estimate the virial masses for these systems. The authors reassess the cluster-galaxy alignment analysis of Adams, Strom, and Strom (1980) and examine the relationship between the luminosity and morphological type of the cluster members and the cluster itself.
Chapman N. F. G.
Geller Margaret J.
Huchra John P.
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