Heat conduction in cooling flows

摘要: It has been suggested that electron conduction may significantly reduce the accretion rate (and star foramtion rate) for cooling flows in clusters of galaxies. A numerical hydrodynamics code was used to investigate time behavior with conduction. The usual coefficient is modified by an efficiency factor, mu, realize effects tangled magnetic field lines. Two classes models are considered, one where mu independent position and time, inflow stretches lines changes mu. In both cases, there only a narrow range initial conditions which cluster reduced while significant temperature gradient occurs. first case, no steady solution exists met. second state solutions occur met, but values = 0.001. 23 references.