Probing quasar shutdown timescales with Hanny's Voorwerp
Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition into and out of such phases is, however, unknown. We present the first measuremen...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Conference item |
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2012
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| _version_ | 1826301487803793408 |
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| author | Evans, D Schawinski, K Virani, S Urry, C Keel, W Natarajan, P Lintott, C Manning, A Coppi, P Kaviraj, S Bamford, S Józsa, G Garrett, M Van Arkel, H Gay, P Fortson, L |
| author_facet | Evans, D Schawinski, K Virani, S Urry, C Keel, W Natarajan, P Lintott, C Manning, A Coppi, P Kaviraj, S Bamford, S Józsa, G Garrett, M Van Arkel, H Gay, P Fortson, L |
| author_sort | Evans, D |
| collection | OXFORD |
| description | Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition into and out of such phases is, however, unknown. We present the first measurement of the shutdown timescale for an individual quasar using Suzaku and XMM-Newton X-ray observations of the nearby galaxy IC 2497, which hosted a luminous quasar no more than ∼230,000 years ago that is still seen as a light echo in 'Hanny's Voorwerp', but whose presentday radiative output is lower by at least 2 and more likely by over 4 orders of magnitude. This extremely rapid shutdown provides new insights into the physics of accretion in supermassive black holes, and may signal a transition of the accretion disk to a radiatively inefficient state. These results were first presented by [1]. © 2012 American Institute of Physics. |
| first_indexed | 2024-03-07T05:33:11Z |
| format | Conference item |
| id | oxford-uuid:e2f995cb-b624-44ac-bb12-5372a3cd9ed5 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T05:33:11Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:e2f995cb-b624-44ac-bb12-5372a3cd9ed52022-03-27T10:05:31ZProbing quasar shutdown timescales with Hanny's VoorwerpConference itemhttp://purl.org/coar/resource_type/c_5794uuid:e2f995cb-b624-44ac-bb12-5372a3cd9ed5Symplectic Elements at Oxford2012Evans, DSchawinski, KVirani, SUrry, CKeel, WNatarajan, PLintott, CManning, ACoppi, PKaviraj, SBamford, SJózsa, GGarrett, MVan Arkel, HGay, PFortson, LGalaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition into and out of such phases is, however, unknown. We present the first measurement of the shutdown timescale for an individual quasar using Suzaku and XMM-Newton X-ray observations of the nearby galaxy IC 2497, which hosted a luminous quasar no more than ∼230,000 years ago that is still seen as a light echo in 'Hanny's Voorwerp', but whose presentday radiative output is lower by at least 2 and more likely by over 4 orders of magnitude. This extremely rapid shutdown provides new insights into the physics of accretion in supermassive black holes, and may signal a transition of the accretion disk to a radiatively inefficient state. These results were first presented by [1]. © 2012 American Institute of Physics. |
| spellingShingle | Evans, D Schawinski, K Virani, S Urry, C Keel, W Natarajan, P Lintott, C Manning, A Coppi, P Kaviraj, S Bamford, S Józsa, G Garrett, M Van Arkel, H Gay, P Fortson, L Probing quasar shutdown timescales with Hanny's Voorwerp |
| title | Probing quasar shutdown timescales with Hanny's Voorwerp |
| title_full | Probing quasar shutdown timescales with Hanny's Voorwerp |
| title_fullStr | Probing quasar shutdown timescales with Hanny's Voorwerp |
| title_full_unstemmed | Probing quasar shutdown timescales with Hanny's Voorwerp |
| title_short | Probing quasar shutdown timescales with Hanny's Voorwerp |
| title_sort | probing quasar shutdown timescales with hanny s voorwerp |
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