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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| פורמט: | Conference item |
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2002
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| _version_ | 1826279569051615232 |
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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. |
| first_indexed | 2024-03-07T00:00:42Z |
| format | Conference item |
| id | oxford-uuid:75d73a66-2e2a-4d28-8b5e-8287f3ca8c5f |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:00:42Z |
| publishDate | 2002 |
| record_format | dspace |
| 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 |