Search: WFRF:(Akiyama Kazunori)
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Detection of Intrin...
Detection of Intrinsic Source Structure at similar to 3 Schwarzschild Radii with Millimeter-VLBI Observations of SAGITTARIUS A*
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- Lu, Ru-Sen (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Massachusetts Institute of Technology (MIT)
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- Krichbaum, Thomas P. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Roy, Alan L. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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show more...
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- Fish, Vincent L. (author)
- Massachusetts Institute of Technology (MIT)
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- Doeleman, Sheperd S. (author)
- Harvard-Smithsonian Center for Astrophysics,Massachusetts Institute of Technology (MIT)
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- Johnson, Michael D. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Akiyama, Kazunori (author)
- University of Tokyo, Japan,National Astronomical Observatory of Japan,Massachusetts Institute of Technology (MIT)
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- Psaltis, Dimitrios (author)
- University of Arizona
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- Alef, Walter (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Asada, Keiichi (author)
- Academia Sinica Taiwan
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- Beaudoin, Christopher (author)
- Massachusetts Institute of Technology (MIT)
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- Bertarini, Alessandra (author)
- Universität Bonn,University of Bonn,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Blackburn, Lindy (author)
- Harvard-Smithsonian Center for Astrophysics
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- Blundell, Ray (author)
- Harvard-Smithsonian Center for Astrophysics
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- Bower, Geoffrey C. (author)
- Academia Sinica Taiwan
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- Brinkerink, Christiaan (author)
- Radboud Universiteit,Radboud University
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- Broderick, Avery E. (author)
- University of Waterloo,Perimeter Institute for Theoretical Physics
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- Cappallo, Roger (author)
- Massachusetts Institute of Technology (MIT)
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- Crew, Geoffrey B. (author)
- Massachusetts Institute of Technology (MIT)
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- Dexter, Jason (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Dexter, Matt (author)
- University of California
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- Falcke, Heino (author)
- 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)
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- Freund, Robert (author)
- University of Arizona
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- Friberg, Per (author)
- East Asian Observatory
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- Greer, Christopher H. (author)
- University of Arizona
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- Gurwell, Mark A. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Ho, Paul T. P. (author)
- Academia Sinica Taiwan
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- Honma, Mareki (author)
- The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan
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- Inoue, Makoto (author)
- Academia Sinica Taiwan
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- Kim, Junhan (author)
- University of Arizona
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- Lamb, James (author)
- California Institute of Technology (Caltech)
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- Lindqvist, Michael, 1960 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Macmahon, David (author)
- University of California
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- Marrone, Daniel P. (author)
- University of Arizona
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- Marti-Vidal, Ivan, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Menten, Karl M. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Moran, James M. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Nagar, Neil M. (author)
- Universidad de Concepción,University of Concepcion
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- Plambeck, Richard L. (author)
- University of California
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- Primiani, Rurik A. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Rogers, Alan E. E. (author)
- Massachusetts Institute of Technology (MIT)
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- Ros, Eduardo (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universitat de Valencia
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- Rottmann, Helge (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- SooHoo, Jason (author)
- Massachusetts Institute of Technology (MIT)
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- Spilker, Justin (author)
- The University of Texas at Austin, USA,University of Arizona
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- Stone, Jordan (author)
- University of Arizona
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- Strittmatter, Peter (author)
- University of Arizona
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- Tilanus, Remo P. J. (author)
- Radboud Universiteit,Radboud University,Universiteit Leiden (UL),Leiden University (UL)
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- Titus, Michael (author)
- Massachusetts Institute of Technology (MIT)
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- Vertatschitsch, Laura (author)
- Harvard-Smithsonian Center for Astrophysics
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- Wagner, Jan (author)
- 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)
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- Weintroub, Jonathan (author)
- Harvard-Smithsonian Center for Astrophysics
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- Wright, Melvyn (author)
- University of California
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- Young, Ken H. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Zensus, J. Anton (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Ziurys, Lucy M. (author)
- University of Arizona
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Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) Massachusetts Institute of Technology (MIT) (creator_code:org_t)
- 2018-05-24
- 2018
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 1538-4357 .- 0004-637X. ; 859:1
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Abstract
Subject headings
Close
- 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.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Galaxy: center
- techniques: interferometric
- techniques: high angular resolution
- submillimeter: general
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Lu, Ru-Sen
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Krichbaum, Thoma ...
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Roy, Alan L.
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Fish, Vincent L.
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Doeleman, Sheper ...
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Johnson, Michael ...
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Akiyama, Kazunor ...
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Psaltis, Dimitri ...
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Alef, Walter
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Asada, Keiichi
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Beaudoin, Christ ...
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Bertarini, Aless ...
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Blackburn, Lindy
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Blundell, Ray
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Bower, Geoffrey ...
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Brinkerink, Chri ...
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Broderick, Avery ...
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Cappallo, Roger
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Crew, Geoffrey B ...
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Dexter, Jason
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Dexter, Matt
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Falcke, Heino
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Freund, Robert
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Friberg, Per
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Greer, Christoph ...
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Gurwell, Mark A.
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Ho, Paul T. P.
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Honma, Mareki
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Inoue, Makoto
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Kim, Junhan
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Lamb, James
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Lindqvist, Micha ...
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Macmahon, David
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Marrone, Daniel ...
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Marti-Vidal, Iva ...
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Menten, Karl M.
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Moran, James M.
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Nagar, Neil M.
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Plambeck, Richar ...
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Primiani, Rurik ...
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Rogers, Alan E. ...
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Ros, Eduardo
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Rottmann, Helge
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SooHoo, Jason
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Spilker, Justin
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Stone, Jordan
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Strittmatter, Pe ...
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Tilanus, Remo P. ...
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Titus, Michael
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Vertatschitsch, ...
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Wagner, Jan
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Weintroub, Jonat ...
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Wright, Melvyn
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Young, Ken H.
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Zensus, J. Anton
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Ziurys, Lucy M.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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Astrophysical Jo ...
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Chalmers University of Technology