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The ALMA phasing system: A beamforming capability for ultra-high-resolution science at (sub)millimeter wavelengths

Matthews, L. D. (author)
Massachusetts Institute of Technology (MIT)
Crew, G. (author)
Massachusetts Institute of Technology (MIT)
Doeleman, S. (author)
Massachusetts Institute of Technology (MIT),Harvard-Smithsonian Center for Astrophysics
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Lacasse, R. (author)
National Radio Astronomy Observatory
Saez, A. F. (author)
Atacama Large Millimeter-submillimeter Array (ALMA)
Alef, W. (author)
Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
Akiyama, K. (author)
National Astronomical Observatory of Japan,Massachusetts Institute of Technology (MIT)
Amestica, R. (author)
National Radio Astronomy Observatory
Anderson, J. M. (author)
Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Deutsches GeoForschungsZentrum (GFZ),German Research Centre for Geosciences (GFZ)
Barkats, D. A. (author)
Harvard-Smithsonian Center for Astrophysics,Atacama Large Millimeter-submillimeter Array (ALMA)
Baudry, A. (author)
Université de Bordeaux,University of Bordeaux
Broguière, D. (author)
Institut de Radioastronomie Millimétrique (IRAM)
Escoffier, R. (author)
National Radio Astronomy Observatory
Fish, V. (author)
Massachusetts Institute of Technology (MIT)
Greenberg, J. (author)
National Radio Astronomy Observatory
Hecht, M. H. (author)
Massachusetts Institute of Technology (MIT)
Hiriart, R. (author)
National Radio Astronomy Observatory Socorro
Hirota, A. (author)
Atacama Large Millimeter-submillimeter Array (ALMA)
Honma, M. (author)
The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan
Ho, P. T.P. (author)
Academia Sinica Taiwan
Impellizzeri, C. M. V. (author)
Atacama Large Millimeter-submillimeter Array (ALMA)
Inoue, M. (author)
Academia Sinica Taiwan
Kohno, Y. (author)
National Astronomical Observatory of Japan
Lopez, B. (author)
Atacama Large Millimeter-submillimeter Array (ALMA)
Marti-Vidal, Ivan, 1980 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Messias, H. (author)
Atacama Large Millimeter-submillimeter Array (ALMA),European Southern Observatory Santiago
Meyer-Zhao, Z. (author)
Academia Sinica Taiwan
Mora-Klein, M. (author)
National Radio Astronomy Observatory
Nagar, N. M. (author)
Universidad de Concepción,University of Concepcion
Nishioka, H. (author)
Academia Sinica Taiwan
Oyama, T. (author)
National Astronomical Observatory of Japan
Pankratius, V. (author)
Massachusetts Institute of Technology (MIT)
Perez, J. (author)
National Radio Astronomy Observatory
Phillips, N. (author)
Atacama Large Millimeter-submillimeter Array (ALMA)
Pradel, N. (author)
Academia Sinica Taiwan
Rottmann, H. (author)
Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
Roy, A. (author)
Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
Ruszczyk, C. (author)
Massachusetts Institute of Technology (MIT)
Shillue, B. (author)
National Radio Astronomy Observatory
Suzuki, S. (author)
National Astronomical Observatory of Japan
Treacy, R. (author)
National Radio Astronomy Observatory
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 (creator_code:org_t)
2017-12-13
2018
English.
In: Publications of the Astronomical Society of the Pacific. - : IOP Publishing. - 0004-6280 .- 1538-3873. ; 130:983
Related links:
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) has developed and deployed the hardware and software necessary to coherently sum the signals of individual ALMA antennas and record the aggregate sum in Very Long Baseline Interferometry (VLBI) Data Exchange Format. These beamforming capabilities allow the ALMA array to collectively function as the equivalent of a single large aperture and participate in global VLBI arrays. The inclusion of phased ALMA in current VLBI networks operating at (sub) millimeter wavelengths provides an order of magnitude improvement in sensitivity, as well as enhancements in u–v coverage and north–south angular resolution. The availability of a phased ALMA enables a wide range of new ultra-high angular resolution science applications, including the resolution of supermassive black holes on event horizon scales and studies of the launch and collimation of astrophysical jets. It also provides a high-sensitivity aperture that may be used for investigations such as pulsar searches at high frequencies. This paper provides an overview of the ALMA Phasing System design, implementation, and performance characteristics.

Subject headings

NATURVETENSKAP  -- Data- och informationsvetenskap -- Annan data- och informationsvetenskap (hsv//swe)
NATURAL SCIENCES  -- Computer and Information Sciences -- Other Computer and Information Science (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

Methods: observational
Instrumentation: high angular resolution
Instrumentation: interferometers

Publication and Content Type

art (subject category)
ref (subject category)

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