AGN and cooling flows

For two decades the steady-state cooling-flow model has dominated-the literature of cluster and elliptical-galaxy X-ray sources. For ten years this model has been in severe difficulty from a theoretical point of view, and it is now coming under increasing pressure observationally A small number of e...

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Hoofdauteur: Binney, J
Formaat: Conference item
Gepubliceerd in: 2002
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author Binney, J
author_facet Binney, J
author_sort Binney, J
collection OXFORD
description For two decades the steady-state cooling-flow model has dominated-the literature of cluster and elliptical-galaxy X-ray sources. For ten years this model has been in severe difficulty from a theoretical point of view, and it is now coming under increasing pressure observationally A small number of enthusiasts have argued for a radically different interpretation of the data, but had little impacton prevailing opinion be-causeAhe unsteady heating picture that they-advocate is extremely hard to work out in detail. Here I explain why it is difficult to extract robust observational predictions from the heating picture. Major problems include the variability of the sources, the different ways in which a bi-polar flow can impact on X-ray emission, the weakness of synchrotron emission from sub-relativistic flows, and the sensitivity of synchrotron emission to a magnetic field that is probably highly localized.
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spelling oxford-uuid:75d73a66-2e2a-4d28-8b5e-8287f3ca8c5f2022-03-26T20:11:56ZAGN and cooling flowsConference itemhttp://purl.org/coar/resource_type/c_5794uuid:75d73a66-2e2a-4d28-8b5e-8287f3ca8c5fSymplectic Elements at Oxford2002Binney, JFor two decades the steady-state cooling-flow model has dominated-the literature of cluster and elliptical-galaxy X-ray sources. For ten years this model has been in severe difficulty from a theoretical point of view, and it is now coming under increasing pressure observationally A small number of enthusiasts have argued for a radically different interpretation of the data, but had little impacton prevailing opinion be-causeAhe unsteady heating picture that they-advocate is extremely hard to work out in detail. Here I explain why it is difficult to extract robust observational predictions from the heating picture. Major problems include the variability of the sources, the different ways in which a bi-polar flow can impact on X-ray emission, the weakness of synchrotron emission from sub-relativistic flows, and the sensitivity of synchrotron emission to a magnetic field that is probably highly localized.
spellingShingle Binney, J
AGN and cooling flows
title AGN and cooling flows
title_full AGN and cooling flows
title_fullStr AGN and cooling flows
title_full_unstemmed AGN and cooling flows
title_short AGN and cooling flows
title_sort agn and cooling flows
work_keys_str_mv AT binneyj agnandcoolingflows