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FältnamnIndikatorerMetadata
00009657naa a2201093 4500
001oai:research.chalmers.se:8761b07e-3376-43f3-9cc2-10685677ad2d
003SwePub
008180614s2018 | |||||||||||000 ||eng|
0247 a https://doi.org/10.3847/1538-4357/aabe2e2 DOI
0247 a https://research.chalmers.se/publication/5035932 URI
0247 a https://research.chalmers.se/publication/5036232 URI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 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
2451 0a Detection of Intrinsic Source Structure at similar to 3 Schwarzschild Radii with Millimeter-VLBI Observations of SAGITTARIUS A*
264 c 2018-05-24
264 1b 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 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
650 7a NATURVETENSKAPx Fysikx Annan fysik0 (SwePub)103992 hsv//swe
650 7a 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
7001 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
7001 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
7001 a Fish, Vincent L.u Massachusetts Institute of Technology (MIT)4 aut
7001 a Doeleman, Sheperd S.u Harvard-Smithsonian Center for Astrophysics,Massachusetts Institute of Technology (MIT)4 aut
7001 a Johnson, Michael D.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Akiyama, Kazunoriu University of Tokyo, Japan,National Astronomical Observatory of Japan,Massachusetts Institute of Technology (MIT)4 aut
7001 a Psaltis, Dimitriosu University of Arizona4 aut
7001 a Alef, Walteru Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a Asada, Keiichiu Academia Sinica Taiwan4 aut
7001 a Beaudoin, Christopheru Massachusetts Institute of Technology (MIT)4 aut
7001 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
7001 a Blackburn, Lindyu Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Blundell, Rayu Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Bower, Geoffrey C.u Academia Sinica Taiwan4 aut
7001 a Brinkerink, Christiaanu Radboud Universiteit,Radboud University4 aut
7001 a Broderick, Avery E.u University of Waterloo,Perimeter Institute for Theoretical Physics4 aut
7001 a Cappallo, Rogeru Massachusetts Institute of Technology (MIT)4 aut
7001 a Crew, Geoffrey B.u Massachusetts Institute of Technology (MIT)4 aut
7001 a Dexter, Jasonu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a Dexter, Mattu University of California4 aut
7001 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
7001 a Freund, Robertu University of Arizona4 aut
7001 a Friberg, Peru East Asian Observatory4 aut
7001 a Greer, Christopher H.u University of Arizona4 aut
7001 a Gurwell, Mark A.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Ho, Paul T. P.u Academia Sinica Taiwan4 aut
7001 a Honma, Marekiu The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan4 aut
7001 a Inoue, Makotou Academia Sinica Taiwan4 aut
7001 a Kim, Junhanu University of Arizona4 aut
7001 a Lamb, Jamesu California Institute of Technology (Caltech)4 aut
7001 a Lindqvist, Michael,d 1960u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mlq
7001 a Macmahon, Davidu University of California4 aut
7001 a Marrone, Daniel P.u University of Arizona4 aut
7001 a Marti-Vidal, Ivan,d 1980u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mivan
7001 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
7001 a Moran, James M.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Nagar, Neil M.u Universidad de Concepción,University of Concepcion4 aut
7001 a Plambeck, Richard L.u University of California4 aut
7001 a Primiani, Rurik A.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Rogers, Alan E. E.u Massachusetts Institute of Technology (MIT)4 aut
7001 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
7001 a Rottmann, Helgeu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a SooHoo, Jasonu Massachusetts Institute of Technology (MIT)4 aut
7001 a Spilker, Justinu The University of Texas at Austin, USA,University of Arizona4 aut
7001 a Stone, Jordanu University of Arizona4 aut
7001 a Strittmatter, Peteru University of Arizona4 aut
7001 a Tilanus, Remo P. J.u Radboud Universiteit,Radboud University,Universiteit Leiden (UL),Leiden University (UL)4 aut
7001 a Titus, Michaelu Massachusetts Institute of Technology (MIT)4 aut
7001 a Vertatschitsch, Laurau Harvard-Smithsonian Center for Astrophysics4 aut
7001 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
7001 a Weintroub, Jonathanu Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Wright, Melvynu University of California4 aut
7001 a Young, Ken H.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 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
7001 a Ziurys, Lucy M.u University of Arizona4 aut
7102 a Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG)b Massachusetts Institute of Technology (MIT)4 org
7730 t Astrophysical Journald : American Astronomical Societyg 859:1q 859:1x 1538-4357x 0004-637X
8564 u https://research.chalmers.se/publication/503593/file/503593_Fulltext.pdfx primaryx freey FULLTEXT
8564 u https://doi.org/10.3847/1538-4357/aabe2e
8564 8u https://doi.org/10.3847/1538-4357/aabe2e
8564 8u https://research.chalmers.se/publication/503593
8564 8u https://research.chalmers.se/publication/503623

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