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dc.contributor.authorKim, Junhan*
dc.contributor.authorMarrone, Daniel P.*
dc.contributor.authorRoy, Alan L.*
dc.contributor.authorWagner, Jan*
dc.contributor.authorAsada, Keiichi*
dc.contributor.authorBeaudoin, Christopher*
dc.contributor.authorBlanchard, Jay*
dc.contributor.authorCarlstrom, John E.*
dc.contributor.authorChen, Ming-Tang*
dc.contributor.authorCrawford, Thomas M.*
dc.contributor.authorCrew, Geoffrey B.*
dc.contributor.authorDoeleman, Sheperd S.*
dc.contributor.authorFish, Vincent L.*
dc.contributor.authorGreer, Christopher H.*
dc.contributor.authorGurwell, Mark A.*
dc.contributor.authorHenning, Jason W.*
dc.contributor.authorInoue, Makoto*
dc.contributor.authorKeisler, Ryan*
dc.contributor.authorKrichbaum, Thomas P.*
dc.contributor.authorLu, Ru-Sen*
dc.contributor.authorMuders, Dirk*
dc.contributor.authorMüller, Cornelia*
dc.contributor.authorNguyen, Chi H.*
dc.contributor.authorRos, Eduardo*
dc.contributor.authorSooHoo, Jason*
dc.contributor.authorTilanus, Remo P. J.*
dc.contributor.authorTitus, Michael*
dc.contributor.authorVertatschitsch, Laura*
dc.contributor.authorWeintroub, Jonathan*
dc.contributor.authorZensus, J. Anton*
dc.date.accessioned2018-11-07T19:24:54Z
dc.date.available2018-11-07T19:24:54Z
dc.date.issued2018-07-10
dc.identifier.citationJunhan Kim et al 2018 ApJ 861 129en_US
dc.identifier.issn1538-4357
dc.identifier.doi10.3847/1538-4357/aac7c6
dc.identifier.urihttp://hdl.handle.net/10150/630579
dc.description.abstractCentaurus A (Cen A) is a bright radio source associated with the nearby galaxy NGC 5128 where high-resolution radio observations can probe the jet at scales of less than a light day. The South Pole Telescope (SPT) and the Atacama Pathfinder Experiment performed a single-baseline very-long-baseline interferometry (VLBI) observation of Cen A in 2015 January as part of VLBI receiver deployment for the SPT. We measure the correlated flux density of Cen A at a wavelength of 1.4 mm on a similar to 7000 km (5 G lambda) baseline. Ascribing this correlated flux density to the core, and with the use of a contemporaneous short-baseline flux density from a Submillimeter Array observation, we infer a core brightness temperature of 1.4 x 10(11) K. This is close to the equipartition brightness temperature, where the magnetic and relativistic particle energy densities are equal. Under the assumption of a circular Gaussian core component, we derive an upper limit to the core size phi = 34.0 +/- 1.8 mu as, corresponding to 120 Schwarzschild radii for a black hole mass of 5.5 x. 10(7) M-circle dot.en_US
dc.description.sponsorshipNSF [AST-1207752, AST-1440254, AST-1207704, AST-1310896, AST-1207730, AST-1402161]; ERC Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" [610058]; MINECO [AYA-2012-38491-C02-01, AYA2015-63939-C2-2-P]; Generalitat Valenciana [PROMETEOII/2014/057]; National Science Foundation [PLR-1248097]; NSF Physics Frontier Center grant to the Kavli Institute of Cosmological Physics at the University of Chicago [PHY-0114422]; Kavli Foundation; Gordon and Betty Moore Foundation through Grant GBMF [947]; Smithsonian Institution; Academia Sinicaen_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.relation.urlhttp://stacks.iop.org/0004-637X/861/i=2/a=129?key=crossref.3a29d708814292a30163dbb5e0d25a9fen_US
dc.rights© 2018. The American Astronomical Society. All rights reserved.en_US
dc.subjectblack hole physicsen_US
dc.subjectgalaxies: activeen_US
dc.subjectgalaxies: individual (Centaurus A)en_US
dc.subjectsubmillimeter: generalen_US
dc.subjecttechniques: high angular resolutionen_US
dc.subjecttechniques: interferometricen_US
dc.titleThe 1.4 mm Core of Centaurus A: First VLBI Results with the South Pole Telescopeen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Dept Astronen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalASTROPHYSICAL JOURNALen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleThe Astrophysical Journal
dc.source.volume861
dc.source.issue2
dc.source.beginpage129
refterms.dateFOA2018-11-07T19:24:55Z


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