Other
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210..883f&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Oct. 15, 1984, p. 883-890.
Other
5
Astronomical Models, Galactic Clusters, Virial Theorem, Big Bang Cosmology, Error Analysis, Many Body Problem, Mass Distribution, Mass To Light Ratios
Scientific paper
Model clusters selected from n-body simulations of clustering are used to evaluate the accuracy of virial methods in mass determination. Clusters having high virial masses due to contamination are identifiable by means of a chi-squared test which compares line-of-sight velocities with a normal distribution. For clusters with good chi-squared fits, the virial mass-to-actual mass ratio obtained indicates that a large degree of scatter inheres in the virial method. Atteention is given to mass-to-light ratio results for the Coma, A2151, and Hercules Supercluster formations. While the last of these is seriously contaminated, solar mass/solar luminosity ratios of 201 and 168 are derived for the other two. These ratios, however, are held to be uncertain by a factor of at least 3, and may therefore be due to 'massive halo' galaxies and intracluster gas.
Bhavsar Suketu P.
Fernley J. A.
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