Title:	The virial masses of clusters of galaxies and the effects of contamination
Authors:	Fernley, J.A. Bhavsar, S.P.
Keywords:	ASTRONOMICAL MODELS, GALACTIC CLUSTERS, VIRIAL THEOREM, BIG BANG COSMOLOGY, ERROR ANALYSIS, MANY BODY PROBLEM, MASS DISTRIBUTION,ATIOS, MASS TO LIGHT RATIOS
Issue Date:	Oct-1984
Publisher:	Blackwell Publishing for the Royal Astronomical Society
Citation:	Monthly Notices of the Royal Astronomical Society, 1984, Vol.210, p883-890
Abstract:	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.
Description:	Open Access
URI:	http://hdl.handle.net/2289/1549
ISSN:	0035-8711
Alternative Location:	http://adsabs.harvard.edu/cgi-bin/bib_query?1984MNRAS.210..883F http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984MNRAS.210..883F&link_type=ARTICLE&db_key=AST
Copyright:	(1984) Royal Astronomical Society
Appears in Collections:	Research Papers (A&A)

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