Statistics – Computation
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221...15m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, July 1, 1986, p. 15-24.
Statistics
Computation
11
Computational Astrophysics, Density Distribution, Galactic Clusters, Galactic Rotation, Velocity Distribution, Anisotropy, Luminosity, Mass Distribution, Mass To Light Ratios
Scientific paper
The authors have repeated calculations by Fuchs & Materne (1982) of the variation of the velocity dispersion with radius in the Coma cluster using the new data of Godwin, Metcalfe & Peach on the galaxy surfacedensity. The authors find that the data are best represented by a model of constant velocity anisotropy (possibly by isotropy). This is contrary to Fuchs & Materne's result but agrees with the self-consistent model calculations of Kent & Gunn. The total cluster mass is 3.5×1015M_sun; and the blue mass-to-light ratio of material within 2.7 Mpc of the cluster centre is 240 (H0 = 50 km s-1Mpc-1), with a major uncertainty in M/L lying in uncertainties as to the contributions to the luminosity from galaxies fainter than b = 20.5 and from intergalactic light.
Millington J. C. S.
Peach John V.
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