The mass of the Coma cluster

Details The mass of the Coma cluster The mass of the Coma cluster

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92.1248t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 92, Dec. 1986, p. 1248-1253.

Astronomy and Astrophysics

Astronomy

144

Astronomical Models, Galactic Clusters, Mass Distribution, Circular Orbits, Radial Velocity, Virial Theorem

Scientific paper

The authors examine the uncertainties in mass estimates for the Coma cluster derived from position and velocity data for the galaxies. If the mass distribution is assumed to parallel the galaxy distribution, the total mass within 5.4h50-1 Mpc is 1.9×1015h50-1M_sun; to an accuracy of about 30% (for H0 = 50 h50 km/s/Mpc). However, if the form of the mass distribution is not constrained, the total mass in this region can range between 6×1014h50-1 M_sun; and 5×1015h50-1 M_sun;. Low-mass models have all the mass in the cluster core and require the galaxies to be on near circular orbits. High-mass models have weakly concentrated mass distributions and primarily radial orbits. Galaxy data alone are unlikely to be able to distinguish between these possibilities.

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