Is the core of the Coma cluster more massive than we thought?

Details Is the core of the Coma cluster more massive than we thought? Is the core of the Coma cluster more massive than we thought?

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95...15t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, Jan. 1988, p. 15-18.

Astronomy and Astrophysics

Astronomy

21

Galactic Clusters, Mass Distribution, Mass To Light Ratios, Astronomical Models, Brightness, X Ray Spectra

Scientific paper

The authors investigate how the mass distribution and mass-to-light ratio of the Coma cluster are constrained by optical and X-ray observations. The X-ray data of Cowie, Henriksen, and Mushotzky (1987) suggest that the mass of the cluster core is higher than optical estimates based on the assumption that galaxies trace the mass. The X-ray data do not strongly constrain the mass distribution beyond 2h50-1Mpc and are consistent both with a low total mass for the cluster and with a mass similar to the standard value. The low-mass model requires galaxies in the outer part of the cluster to be on near-circular orbits.

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