Evidence that powerful radio jets have a profound influence on the evolution of galaxies
The relationships between supermassive black holes and the properties of their associated dark-matter halos imply that outflows from accreting black holes provide a feedback mechanism regulating galaxy formation. Accreting black holes with weak or undetectable radio jets (radio-quiet quasars) outnum...
| Autores principales: | , |
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| Formato: | Journal article |
| Publicado: |
2004
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| _version_ | 1826289456315891712 |
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| author | Rawlings, S Jarvis, M |
| author_facet | Rawlings, S Jarvis, M |
| author_sort | Rawlings, S |
| collection | OXFORD |
| description | The relationships between supermassive black holes and the properties of their associated dark-matter halos imply that outflows from accreting black holes provide a feedback mechanism regulating galaxy formation. Accreting black holes with weak or undetectable radio jets (radio-quiet quasars) outnumber those with powerful jets (radio-loud quasars) by a factor ~10-100, so powerful-jet outflows are often neglected. However, whenever powerful jets are triggered, there is a dramatic (factor >100) step-function increase in the efficiency of feedback. We use a feedback model, together with the measured space density of flat-spectrum radio-loud quasars, to show that a powerful-jet episode probably occurred in every protocluster in the Universe. Before jet triggering, there was time for gravitational collapse to create many (~10-100) surrounding protogalaxies massive enough to host radio-quiet quasars. After triggering, the powerful jet pushes back and heats ionized gas so that it cannot fall onto these protogalaxies and cool. Once neutral/molecular gas reservoirs become exhausted, there is a synchronized shut down in both star-formation and black-hole activity throughout the protocluster. These considerations imply that radio-loud quasars have a profound influence on the evolution of all the galaxies seen in clusters today. |
| first_indexed | 2024-03-07T02:29:09Z |
| format | Journal article |
| id | oxford-uuid:a6a6c1be-f91e-472a-bc40-df4934e31fa6 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:29:09Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:a6a6c1be-f91e-472a-bc40-df4934e31fa62022-03-27T02:48:41ZEvidence that powerful radio jets have a profound influence on the evolution of galaxiesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a6a6c1be-f91e-472a-bc40-df4934e31fa6Symplectic Elements at Oxford2004Rawlings, SJarvis, MThe relationships between supermassive black holes and the properties of their associated dark-matter halos imply that outflows from accreting black holes provide a feedback mechanism regulating galaxy formation. Accreting black holes with weak or undetectable radio jets (radio-quiet quasars) outnumber those with powerful jets (radio-loud quasars) by a factor ~10-100, so powerful-jet outflows are often neglected. However, whenever powerful jets are triggered, there is a dramatic (factor >100) step-function increase in the efficiency of feedback. We use a feedback model, together with the measured space density of flat-spectrum radio-loud quasars, to show that a powerful-jet episode probably occurred in every protocluster in the Universe. Before jet triggering, there was time for gravitational collapse to create many (~10-100) surrounding protogalaxies massive enough to host radio-quiet quasars. After triggering, the powerful jet pushes back and heats ionized gas so that it cannot fall onto these protogalaxies and cool. Once neutral/molecular gas reservoirs become exhausted, there is a synchronized shut down in both star-formation and black-hole activity throughout the protocluster. These considerations imply that radio-loud quasars have a profound influence on the evolution of all the galaxies seen in clusters today. |
| spellingShingle | Rawlings, S Jarvis, M Evidence that powerful radio jets have a profound influence on the evolution of galaxies |
| title | Evidence that powerful radio jets have a profound influence on the
evolution of galaxies |
| title_full | Evidence that powerful radio jets have a profound influence on the
evolution of galaxies |
| title_fullStr | Evidence that powerful radio jets have a profound influence on the
evolution of galaxies |
| title_full_unstemmed | Evidence that powerful radio jets have a profound influence on the
evolution of galaxies |
| title_short | Evidence that powerful radio jets have a profound influence on the
evolution of galaxies |
| title_sort | evidence that powerful radio jets have a profound influence on the evolution of galaxies |
| work_keys_str_mv | AT rawlingss evidencethatpowerfulradiojetshaveaprofoundinfluenceontheevolutionofgalaxies AT jarvism evidencethatpowerfulradiojetshaveaprofoundinfluenceontheevolutionofgalaxies |