Search: onr:"swepub:oai:research.chalmers.se:8761b07e-3376-43f3-9cc2-10685677ad2d" > Detection of Intrin...
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000 | 09657naa a2201093 4500 | |
001 | oai:research.chalmers.se:8761b07e-3376-43f3-9cc2-10685677ad2d | |
003 | SwePub | |
008 | 180614s2018 | |||||||||||000 ||eng| | |
024 | 7 | a https://doi.org/10.3847/1538-4357/aabe2e2 DOI |
024 | 7 | a https://research.chalmers.se/publication/5035932 URI |
024 | 7 | a https://research.chalmers.se/publication/5036232 URI |
040 | a (SwePub)cth | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a art2 swepub-publicationtype |
072 | 7 | a ref2 swepub-contenttype |
100 | 1 | a Lu, Ru-Senu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Massachusetts Institute of Technology (MIT)4 aut |
245 | 1 0 | a Detection of Intrinsic Source Structure at similar to 3 Schwarzschild Radii with Millimeter-VLBI Observations of SAGITTARIUS A* |
264 | c 2018-05-24 | |
264 | 1 | b American Astronomical Society,c 2018 |
338 | a electronic2 rdacarrier | |
520 | a We report results from very long baseline interferometric (VLBI) observations of the supermassive black hole in the Galactic center, Sgr A*, at 1.3 mm (230 GHz). The observations were performed in 2013 March using six VLBI stations in Hawaii, California, Arizona, and Chile. Compared to earlier observations, the addition of the APEX telescope in Chile almost doubles the longest baseline length in the array, provides additional uv coverage in the N-S direction, and leads to a spatial resolution of similar to 30 mu as (similar to 3 Schwarzschild radii) for Sgr A*. The source is detected even at the longest baselines with visibility amplitudes of similar to 4%-13% of the total flux density. We argue that such flux densities cannot result from interstellar refractive scattering alone, but indicate the presence of compact intrinsic source structure on scales of similar to 3 Schwarzschild radii. The measured nonzero closure phases rule out point-symmetric emission. We discuss our results in the context of simple geometric models that capture the basic characteristics and brightness distributions of disk-and jet-dominated models and show that both can reproduce the observed data. Common to these models are the brightness asymmetry, the orientation, and characteristic sizes, which are comparable to the expected size of the black hole shadow. Future 1.3 mm VLBI observations with an expanded array and better sensitivity will allow more detailed imaging of the horizon-scale structure and bear the potential for a deep insight into the physical processes at the black hole boundary. | |
650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng |
650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
650 | 7 | a NATURVETENSKAPx Fysikx Annan fysik0 (SwePub)103992 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Other Physics Topics0 (SwePub)103992 hsv//eng |
653 | a Galaxy: center | |
653 | a techniques: interferometric | |
653 | a techniques: high angular resolution | |
653 | a submillimeter: general | |
700 | 1 | a Krichbaum, Thomas P.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a Roy, Alan L.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a Fish, Vincent L.u Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Doeleman, Sheperd S.u Harvard-Smithsonian Center for Astrophysics,Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Johnson, Michael D.u Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Akiyama, Kazunoriu University of Tokyo, Japan,National Astronomical Observatory of Japan,Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Psaltis, Dimitriosu University of Arizona4 aut |
700 | 1 | a Alef, Walteru Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a Asada, Keiichiu Academia Sinica Taiwan4 aut |
700 | 1 | a Beaudoin, Christopheru Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Bertarini, Alessandrau Universität Bonn,University of Bonn,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a Blackburn, Lindyu Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Blundell, Rayu Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Bower, Geoffrey C.u Academia Sinica Taiwan4 aut |
700 | 1 | a Brinkerink, Christiaanu Radboud Universiteit,Radboud University4 aut |
700 | 1 | a Broderick, Avery E.u University of Waterloo,Perimeter Institute for Theoretical Physics4 aut |
700 | 1 | a Cappallo, Rogeru Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Crew, Geoffrey B.u Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Dexter, Jasonu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a Dexter, Mattu University of California4 aut |
700 | 1 | a Falcke, Heinou Radboud Universiteit,Radboud University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Netherlands Institute for Radio Astronomy (ASTRON)4 aut |
700 | 1 | a Freund, Robertu University of Arizona4 aut |
700 | 1 | a Friberg, Peru East Asian Observatory4 aut |
700 | 1 | a Greer, Christopher H.u University of Arizona4 aut |
700 | 1 | a Gurwell, Mark A.u Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Ho, Paul T. P.u Academia Sinica Taiwan4 aut |
700 | 1 | a Honma, Marekiu The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan4 aut |
700 | 1 | a Inoue, Makotou Academia Sinica Taiwan4 aut |
700 | 1 | a Kim, Junhanu University of Arizona4 aut |
700 | 1 | a Lamb, Jamesu California Institute of Technology (Caltech)4 aut |
700 | 1 | a Lindqvist, Michael,d 1960u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mlq |
700 | 1 | a Macmahon, Davidu University of California4 aut |
700 | 1 | a Marrone, Daniel P.u University of Arizona4 aut |
700 | 1 | a Marti-Vidal, Ivan,d 1980u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mivan |
700 | 1 | a Menten, Karl M.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a Moran, James M.u Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Nagar, Neil M.u Universidad de Concepción,University of Concepcion4 aut |
700 | 1 | a Plambeck, Richard L.u University of California4 aut |
700 | 1 | a Primiani, Rurik A.u Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Rogers, Alan E. E.u Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Ros, Eduardou Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universitat de Valencia4 aut |
700 | 1 | a Rottmann, Helgeu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a SooHoo, Jasonu Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Spilker, Justinu The University of Texas at Austin, USA,University of Arizona4 aut |
700 | 1 | a Stone, Jordanu University of Arizona4 aut |
700 | 1 | a Strittmatter, Peteru University of Arizona4 aut |
700 | 1 | a Tilanus, Remo P. J.u Radboud Universiteit,Radboud University,Universiteit Leiden (UL),Leiden University (UL)4 aut |
700 | 1 | a Titus, Michaelu Massachusetts Institute of Technology (MIT)4 aut |
700 | 1 | a Vertatschitsch, Laurau Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Wagner, Janu Korea Astronomy and Space Science Institute,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a Weintroub, Jonathanu Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Wright, Melvynu University of California4 aut |
700 | 1 | a Young, Ken H.u Harvard-Smithsonian Center for Astrophysics4 aut |
700 | 1 | a Zensus, J. Antonu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
700 | 1 | a Ziurys, Lucy M.u University of Arizona4 aut |
710 | 2 | a Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG)b Massachusetts Institute of Technology (MIT)4 org |
773 | 0 | t Astrophysical Journald : American Astronomical Societyg 859:1q 859:1x 1538-4357x 0004-637X |
856 | 4 | u https://research.chalmers.se/publication/503593/file/503593_Fulltext.pdfx primaryx freey FULLTEXT |
856 | 4 | u https://doi.org/10.3847/1538-4357/aabe2e |
856 | 4 8 | u https://doi.org/10.3847/1538-4357/aabe2e |
856 | 4 8 | u https://research.chalmers.se/publication/503593 |
856 | 4 8 | u https://research.chalmers.se/publication/503623 |
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