The coma cluster after lunch: Has a galaxcy group passed through the cluster core?

Details The coma cluster after lunch: Has a galaxcy group passed through the cluster core? The coma cluster after lunch: Has a galaxcy group passed through the cluster core?

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...427l..87b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 427, no. 2, p. L87-L90

Computer Science

Numerical Analysis

112

Computerized Simulation, Galactic Clusters, Halos, Hydrodynamics, Interacting Galaxies, Many Body Problem, Optical Properties, X Ray Astronomy, Numerical Analysis, Proportional Counters, Rosat Mission, X Ray Imagery

Scientific paper

We propose that the Coma cluster has recently undergone a collision with the NGC 4839 galaxy group. The ROSAT X-ray morphology, the Coma radio halo, the presence of poststarburst galaxies in the bridge between Coma and NGC 4839, the usually high velocity dispersion for the NGC 4839 group, and the position of a large-scale galaxy filament to the NE of Coma are all used to argue that the NGC 4839 group passed through the core of Coma approximately 2 Gyr ago. We present a new Hydro/N-body simulation of the merger between a galaxy group and a rich cluster that reproduces many of the observed X-ray and optical properties of Coma/NGC 4839.

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