RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE
We present the first 1.3 mm (230 GHz) very long baseline interferometry model image of an active galactic nucleus (AGN) jet using closure phase techniques with a four-element array. The model image of the quasar 1924-292 was obtained with four telescopes at three observatories: the James Clerk Maxwe...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/95504 |
| _version_ | 1811088208915595264 |
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| author | Fish, Vincent L. Weintroub, Jonathan Bower, Geoffrey C. Freund, Robert Friberg, Per Ho, Paul T. P. Honma, Mareki Inoue, Makoto Krichbaum, Thomas P. Marrone, Daniel P. Moran, James M. Oyama, Tomoaki Plambeck, Richard Primiani, Rurik Shen, Zhi-Qiang Tilanus, Remo P. J. Wright, Melvyn Young, Ken H. Ziurys, Lucy M. Zensus, J. Anton Lu, Rusen Doeleman, Sheperd Samuel |
| author2 | Haystack Observatory |
| author_facet | Haystack Observatory Fish, Vincent L. Weintroub, Jonathan Bower, Geoffrey C. Freund, Robert Friberg, Per Ho, Paul T. P. Honma, Mareki Inoue, Makoto Krichbaum, Thomas P. Marrone, Daniel P. Moran, James M. Oyama, Tomoaki Plambeck, Richard Primiani, Rurik Shen, Zhi-Qiang Tilanus, Remo P. J. Wright, Melvyn Young, Ken H. Ziurys, Lucy M. Zensus, J. Anton Lu, Rusen Doeleman, Sheperd Samuel |
| author_sort | Fish, Vincent L. |
| collection | MIT |
| description | We present the first 1.3 mm (230 GHz) very long baseline interferometry model image of an active galactic nucleus (AGN) jet using closure phase techniques with a four-element array. The model image of the quasar 1924-292 was obtained with four telescopes at three observatories: the James Clerk Maxwell Telescope on Mauna Kea in Hawaii, the Arizona Radio Observatory's Submillimeter Telescope in Arizona, and two telescopes of the Combined Array for Research in Millimeter-wave Astronomy in California in 2009 April. With the greatly improved resolution compared with previous observations and robust closure phase measurement, the inner jet structure of 1924-292 was spatially resolved. The inner jet extends to the northwest along a position angle of –53° at a distance of 0.38 mas from the tentatively identified core, in agreement with the inner jet structure inferred from lower frequencies, and making a position angle difference of ~80° with respect to the centimeter jet. The size of the compact core is 0.15 pc with a brightness temperature of 1.2 × 10[superscript 11] K. Compared with those measured at lower frequencies, the low brightness temperature may argue in favor of the decelerating jet model or particle-cascade models. The successful measurement of closure phase paves the way for imaging and time resolving Sgr A* and nearby AGNs with the Event Horizon Telescope. |
| first_indexed | 2024-09-23T13:57:58Z |
| format | Article |
| id | mit-1721.1/95504 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:57:58Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/955042022-10-01T18:17:51Z RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE Fish, Vincent L. Weintroub, Jonathan Bower, Geoffrey C. Freund, Robert Friberg, Per Ho, Paul T. P. Honma, Mareki Inoue, Makoto Krichbaum, Thomas P. Marrone, Daniel P. Moran, James M. Oyama, Tomoaki Plambeck, Richard Primiani, Rurik Shen, Zhi-Qiang Tilanus, Remo P. J. Wright, Melvyn Young, Ken H. Ziurys, Lucy M. Zensus, J. Anton Lu, Rusen Doeleman, Sheperd Samuel Haystack Observatory Lu, Rusen Fish, Vincent L. Doeleman, Sheperd Samuel We present the first 1.3 mm (230 GHz) very long baseline interferometry model image of an active galactic nucleus (AGN) jet using closure phase techniques with a four-element array. The model image of the quasar 1924-292 was obtained with four telescopes at three observatories: the James Clerk Maxwell Telescope on Mauna Kea in Hawaii, the Arizona Radio Observatory's Submillimeter Telescope in Arizona, and two telescopes of the Combined Array for Research in Millimeter-wave Astronomy in California in 2009 April. With the greatly improved resolution compared with previous observations and robust closure phase measurement, the inner jet structure of 1924-292 was spatially resolved. The inner jet extends to the northwest along a position angle of –53° at a distance of 0.38 mas from the tentatively identified core, in agreement with the inner jet structure inferred from lower frequencies, and making a position angle difference of ~80° with respect to the centimeter jet. The size of the compact core is 0.15 pc with a brightness temperature of 1.2 × 10[superscript 11] K. Compared with those measured at lower frequencies, the low brightness temperature may argue in favor of the decelerating jet model or particle-cascade models. The successful measurement of closure phase paves the way for imaging and time resolving Sgr A* and nearby AGNs with the Event Horizon Telescope. 2015-02-25T13:59:35Z 2015-02-25T13:59:35Z 2012-09 2012-07 Article http://purl.org/eprint/type/JournalArticle 2041-8205 2041-8213 http://hdl.handle.net/1721.1/95504 Lu, Ru-Sen, Vincent L. Fish, Jonathan Weintroub, Sheperd S. Doeleman, Geoffrey C. Bower, Robert Freund, Per Friberg, et al. “RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE.” The Astrophysical Journal 757, no. 1 (September 4, 2012): L14. © 2012 The American Astronomical Society en_US http://dx.doi.org/10.1088/2041-8205/757/1/l14 The Astrophysical Journal. Letters 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 | Fish, Vincent L. Weintroub, Jonathan Bower, Geoffrey C. Freund, Robert Friberg, Per Ho, Paul T. P. Honma, Mareki Inoue, Makoto Krichbaum, Thomas P. Marrone, Daniel P. Moran, James M. Oyama, Tomoaki Plambeck, Richard Primiani, Rurik Shen, Zhi-Qiang Tilanus, Remo P. J. Wright, Melvyn Young, Ken H. Ziurys, Lucy M. Zensus, J. Anton Lu, Rusen Doeleman, Sheperd Samuel RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE |
| title | RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE |
| title_full | RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE |
| title_fullStr | RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE |
| title_full_unstemmed | RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE |
| title_short | RESOLVING THE INNER JET STRUCTURE OF 1924-292 WITH THE EVENT HORIZON TELESCOPE |
| title_sort | resolving the inner jet structure of 1924 292 with the event horizon telescope |
| url | http://hdl.handle.net/1721.1/95504 |
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