dc.contributor.author | Johnson, Michael D. | |
dc.contributor.author | Fish, Vincent L. | |
dc.contributor.author | Broderick, Avery E. | |
dc.contributor.author | Wardle, John F. C. | |
dc.contributor.author | Marrone, Daniel P. | |
dc.contributor.author | Doeleman, Sheperd Samuel | |
dc.date.accessioned | 2015-01-29T17:46:05Z | |
dc.date.available | 2015-01-29T17:46:05Z | |
dc.date.issued | 2014-10 | |
dc.date.submitted | 2014-07 | |
dc.identifier.issn | 1538-4357 | |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | http://hdl.handle.net/1721.1/93197 | |
dc.description.abstract | We demonstrate that polarimetric interferometry can be used to extract precise spatial information about compact polarized flares of Sgr A*. We show that, for a faint dynamical component, a single interferometric baseline suffices to determine both its polarization and projected displacement from the quiescent intensity centroid. A second baseline enables two-dimensional reconstruction of the displacement, and additional baselines can self-calibrate using the flare, enhancing synthesis imaging of the quiescent emission. We apply this technique to simulated 1.3 mm wavelength observations of a "hot spot" embedded in a radiatively inefficient accretion disk around Sgr A*. Our results indicate that, even with current sensitivities, polarimetric interferometry with the Event Horizon Telescope can achieve ~5 μas relative astrometry of compact flaring structures near Sgr A* on timescales of minutes. | en_US |
dc.description.sponsorship | National Science Foundation (U.S.) (AST-1207752) | en_US |
dc.description.sponsorship | National Science Foundation (U.S.) (AST-1310896) | en_US |
dc.description.sponsorship | National Science Foundation (U.S.) (AST-1211539) | en_US |
dc.description.sponsorship | Gordon and Betty Moore Foundation (GBMF-3561) | en_US |
dc.language.iso | en_US | |
dc.publisher | IOP Publishing | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1088/0004-637x/794/2/150 | en_US |
dc.rights | 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. | en_US |
dc.source | American Astronomical Society | en_US |
dc.title | RELATIVE ASTROMETRY OF COMPACT FLARING STRUCTURES IN Sgr A* WITH POLARIMETRIC VERY LONG BASELINE INTERFEROMETRY | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Johnson, Michael D., Vincent L. Fish, Sheperd S. Doeleman, Avery E. Broderick, John F. C. Wardle, and Daniel P. Marrone. “RELATIVE ASTROMETRY OF COMPACT FLARING STRUCTURES IN Sgr A* WITH POLARIMETRIC VERY LONG BASELINE INTERFEROMETRY.” The Astrophysical Journal 794, no. 2 (October 6, 2014): 150. © 2014 The American Astronomical Society | en_US |
dc.contributor.department | Haystack Observatory | en_US |
dc.contributor.mitauthor | Fish, Vincent L. | en_US |
dc.contributor.mitauthor | Doeleman, Sheperd Samuel | en_US |
dc.relation.journal | Astrophysical Journal | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Johnson, Michael D.; Fish, Vincent L.; Doeleman, Sheperd S.; Broderick, Avery E.; Wardle, John F. C.; Marrone, Daniel P. | en_US |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |