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The VLBA CANDELS GO...
The VLBA CANDELS GOODS-North Survey -I. survey design, processing, data products, and source counts
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- Deane, R. P. (author)
- University of Witwatersrand,Universiteit van Pretoria,University of Pretoria
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- Radcliffe, Jack F. (author)
- University of Manchester,Universiteit van Pretoria,University of Pretoria
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- Njeri, Ann (author)
- University of Manchester,University of Newcastle upon Tyne
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- Akoto-Danso, Alexander (author)
- Ghana Atomic Energy Commission,Rhodes University
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- Bernardi, Gianni (author)
- Rhodes University,Istituto di Radioastronomia
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- Smirnov, O. (author)
- Rhodes University
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- Beswick, R. J. (author)
- University of Manchester
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- Garrett, Michael A. (author)
- University of Manchester,Universiteit Leiden (UL),Leiden University (UL)
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- Jarvis, M.J. (author)
- University of the Western Cape,University Of Oxford
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- Whittam, Imogen H. (author)
- University of the Western Cape,University Of Oxford
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- Bourke, Stephen, 1978 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Paragi, Z. (author)
- Joint Institute for VLBI in Europe (JIVE)
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Monthly Notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966. ; 529:3, s. 2428-2442
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
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- The past decade has seen significant advances in wide-field cm-wave very long baseline interferometry (VLBI), which is timely given the wide-area, synoptic survey-driven strategy of major facilities across the electromagnetic spectrum. While wide-field VLBI poses significant post-processing challenges that can severely curtail its potential scientific yield, man y dev elopments in the km-scale connected-element interferometer sphere are directly applicable to addressing these. Here we present the design, processing, data products, and source counts from a deep (11 μJy beam -1 ), quasi-uniform sensitivity, contiguous wide-field (160 arcmin 2 ) 1.6 GHz VLBI surv e y of the CANDELS GOODS-North field. This is one of the best-studied extragalactic fields at milli-arcsecond resolution and, therefore, is well-suited as a comparative study for our Tera-pixel VLBI image. The derived VLBI source counts show consistency with those measured in the COSMOS field, which broadly traces the AGN population detected in arcsecond-scale radio surv e ys. Ho we ver, there is a distinctive flattening in the S 1.4GHz ∼100-500 μJy flux density range, which suggests a transition in the population of compact faint radio sources, qualitatively consistent with the excess source counts at 15 GHz that is argued to be an unmodelled population of radio cores. This surv e y approach will assist in deriving robust VLBI source counts and broadening the disco v ery space for future wide-field VLBI surv e ys, including VLBI with the Square Kilometre Array, which will include new large field-of-view antennas on the African continent at ≲1000 km baselines. In addition, it may be useful in the design of both monitoring and/or rapidly triggered VLBI transient programmes.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- galaxies: active
- techniques: interferometric
- techniques: high angular resolution
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Deane, R. P.
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Radcliffe, Jack ...
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Njeri, Ann
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Akoto-Danso, Ale ...
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Bernardi, Gianni
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Smirnov, O.
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show more...
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Beswick, R. J.
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Garrett, Michael ...
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Jarvis, M.J.
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Whittam, Imogen ...
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Bourke, Stephen, ...
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Paragi, Z.
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- About the subject
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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 Atom and Molecul ...
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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 ...
- Articles in the publication
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Monthly Notices ...
- By the university
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Chalmers University of Technology