A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051
We report on the results of a simultaneous monitoring campaign employing eight Chandra X-ray (0.5-10 keV) and six Very Large Array/Extended Very Large Array (8.4 GHz) radio observations of NGC 4051 over seven months. Evidence for compact jets is observed in the 8.4 GHz radio band; this builds on mou...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/95711 |
| _version_ | 1811085870448508928 |
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| author | King, A. L. Miller, J. M. Cackett, E. M. Fabian, Andrew C. Markoff, Sera B. Rupen, M. Reynolds, M. T. Nowak, Michael A. Gultekin, K. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research King, A. L. Miller, J. M. Cackett, E. M. Fabian, Andrew C. Markoff, Sera B. Rupen, M. Reynolds, M. T. Nowak, Michael A. Gultekin, K. |
| author_sort | King, A. L. |
| collection | MIT |
| description | We report on the results of a simultaneous monitoring campaign employing eight Chandra X-ray (0.5-10 keV) and six Very Large Array/Extended Very Large Array (8.4 GHz) radio observations of NGC 4051 over seven months. Evidence for compact jets is observed in the 8.4 GHz radio band; this builds on mounting evidence that jet production may be prevalent even in radio-quiet Seyferts. Assuming comparatively negligible local diffuse emission in the nucleus, the results also demonstrate an inverse correlation of L [subscript radio] ∝ L [–0.72±0.04 over X-ray]. If the A configuration is excluded in the case where diffuse emission plays a significant role, the relation is still L[subscript radio] ∝ L[-0.12±0.05 over X-ray]. Current research linking the mass of supermassive black holes and stellar-mass black holes in the "low/hard" state to X-ray luminosities and radio luminosities suggests a "fundamental plane of accretion onto black holes" that has a positive correlation of L [subscript radio] ∝ L [0.67±0.12 over X-ray]. Our simultaneous results differ from this relation by more than 11σ (6σ excluding the A configuration), indicating that a separate mode of accretion and ejection may operate in this system. A review of the literature shows that the inverse correlation seen in NGC 4051 is seen in three other black hole systems, all of which accrete at near 10% of their Eddington luminosity, perhaps suggesting a distinct mode of disk-jet coupling at high Eddington fractions. We discuss our results in the context of disks and jets in black holes and accretion across the black hole mass scale. |
| first_indexed | 2024-09-23T13:16:51Z |
| format | Article |
| id | mit-1721.1/95711 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:16:51Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/957112022-10-01T14:14:04Z A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051 King, A. L. Miller, J. M. Cackett, E. M. Fabian, Andrew C. Markoff, Sera B. Rupen, M. Reynolds, M. T. Nowak, Michael A. Gultekin, K. MIT Kavli Institute for Astrophysics and Space Research Nowak, Michael A. We report on the results of a simultaneous monitoring campaign employing eight Chandra X-ray (0.5-10 keV) and six Very Large Array/Extended Very Large Array (8.4 GHz) radio observations of NGC 4051 over seven months. Evidence for compact jets is observed in the 8.4 GHz radio band; this builds on mounting evidence that jet production may be prevalent even in radio-quiet Seyferts. Assuming comparatively negligible local diffuse emission in the nucleus, the results also demonstrate an inverse correlation of L [subscript radio] ∝ L [–0.72±0.04 over X-ray]. If the A configuration is excluded in the case where diffuse emission plays a significant role, the relation is still L[subscript radio] ∝ L[-0.12±0.05 over X-ray]. Current research linking the mass of supermassive black holes and stellar-mass black holes in the "low/hard" state to X-ray luminosities and radio luminosities suggests a "fundamental plane of accretion onto black holes" that has a positive correlation of L [subscript radio] ∝ L [0.67±0.12 over X-ray]. Our simultaneous results differ from this relation by more than 11σ (6σ excluding the A configuration), indicating that a separate mode of accretion and ejection may operate in this system. A review of the literature shows that the inverse correlation seen in NGC 4051 is seen in three other black hole systems, all of which accrete at near 10% of their Eddington luminosity, perhaps suggesting a distinct mode of disk-jet coupling at high Eddington fractions. We discuss our results in the context of disks and jets in black holes and accretion across the black hole mass scale. 2015-02-27T14:32:06Z 2015-02-27T14:32:06Z 2010-02 2010-07 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/95711 King, A. L., J. M. Miller, E. M. Cackett, A. C. Fabian, S. Markoff, M. A. Nowak, M. Rupen, K. Gultekin, and M. T. Reynolds. “A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051.” The Astrophysical Journal 729, no. 1 (February 7, 2011): 19. © 2011 The American Astronomical Society en_US http://dx.doi.org/10.1088/0004-637x/729/1/19 The Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing American Astronomical Society |
| spellingShingle | King, A. L. Miller, J. M. Cackett, E. M. Fabian, Andrew C. Markoff, Sera B. Rupen, M. Reynolds, M. T. Nowak, Michael A. Gultekin, K. A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051 |
| title | A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051 |
| title_full | A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051 |
| title_fullStr | A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051 |
| title_full_unstemmed | A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051 |
| title_short | A DISTINCTIVE DISK-JET COUPLING IN THE SEYFERT-1 ACTIVE GALACTIC NUCLEUS NGC 4051 |
| title_sort | distinctive disk jet coupling in the seyfert 1 active galactic nucleus ngc 4051 |
| url | http://hdl.handle.net/1721.1/95711 |
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