Statistics – Computation
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334...59m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 1, 1988, p. 59-69. Research supported by the University of Califo
Statistics
Computation
30
Conductive Heat Transfer, Flow Stability, Galactic Clusters, Gas Flow, Hydrodynamic Equations, Intergalactic Media, Astronomical Models, Computational Astrophysics, Gas Temperature
Scientific paper
Time-dependent numerical hydrodynamic computations of cooling flows in clusters of galaxies are performed to study the global stability of the flows and to determine the amount by which heat conduction can reduce the accretion rates of the flows. Flows with and without a sink for the cooling gas are considered. It is found that a flow with cooling and heat conduction alone would lead to a cooling catastrophe, the product of which is a cold and dense core rapidly accreting mass at the cluster center. There is no observational evidence for these cold accreting cores. Allowing for condensations to form in the cooling gas stabilizes the flow for a sufficiently high condensation rate and yields temperature, density, and mass accretion profiles similar to those inferred from X-ray measurements.
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