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• W3104696307 abstract "There is mounting observational evidence from Chandra for strong interaction between keV gas and AGN in cooling flows. It is now widely accepted that the temperatures of cluster cores are maintained at a level of 1 keV and that the mass deposition rates are lower than earlier ROSAT/Einstein values. Recent theoretical results suggest that thermal conduction can be very efficient even in magnetized plasmas. Motivated by these discoveries, we consider a ``double heating model'' which incorporates the effects of simultaneous heating by both the central AGN and thermal conduction from the hot outer layers of clusters. Using hydrodynamical simulations, we demonstrate that there exists a family of solutions that does not suffer from the cooling catastrophe. In these cases, clusters relax to a stable final state, which is characterized by minimum temperatures of order 1 keV and density and temperature profiles consistent with observations. Moreover, the accretion rates are much reduced, thereby reducing the need for excessive mass deposition rates required by the standard cooling flow models." @default.
• W3104696307 created "2020-11-23" @default.
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• W3104696307 date "2002-12-10" @default.
• W3104696307 modified "2023-10-14" @default.
• W3104696307 title "Heating, Conduction, and Minimum Temperatures in Cooling Flows" @default.
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• W3104696307 doi "https://doi.org/10.1086/344170" @default.
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