Mergers of Systems Containing Gas

Details Mergers of Systems Containing Gas Mergers of Systems Containing Gas

1993-10-13

arxiv.org/abs/astro-ph/9310023v1

Astronomy and Astrophysics

Astrophysics

16 pages, 13 figures upon request, Plain Latex, SUSSEX-AST-PTC-2

Scientific paper

Several simple mergers between model galaxy clusters containing a mixture of gas and dark matter are examined, testing the coupling of the gas to the underlying collisionless material. The gas is shocked, irreversibly dissipating the energy fed into it by the collisionless component and forms a resolved constant-density core. For the dark matter, however, admixture of phase space vacuum is not very efficient and a constant-density core is not produced. In the final state the central gas has little residual kinetic energy, indicating that streaming motions do not help to support the gas.

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