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Science at Very High Angular Resolution with the Square Kilometre Array

Part of: Square Kilometre Array

Published online by Cambridge University Press:  02 January 2013

L. E. H. Godfrey ,
H. Bignall ,
S. Tingay ,
L. Harvey-Smith ,
M. Kramer ,
S. Burke-Spolaor ,
J. C. A. Miller-Jones ,
M. Johnston-Hollitt ,
R. Ekers  and
S. Gulyaev
L. E. H. Godfrey*
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
H. Bignall
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
S. Tingay
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
L. Harvey-Smith
Affiliation:
CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 2121, Australia
M. Kramer
Affiliation:
Max-Planck-Institut fur Radioastronomie, Auf dem Hugel 69, D-53121 Bonn, Germany Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL, UK
S. Burke-Spolaor
Affiliation:
CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 2121, Australia Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
J. C. A. Miller-Jones
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
M. Johnston-Hollitt
Affiliation:
School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6140, New Zealand
R. Ekers
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, GPO Box U1987, Perth, WA 6845, Australia CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 2121, Australia
S. Gulyaev
Affiliation:
Institute for Radio Astronomy and Space Research, Auckland University of Technology, Auckland, New Zealand
*
HCorresponding author. Email: [email protected]
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Abstract

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Preliminary specifications for the Square Kilometre Array (SKA) call for 25% of the total collecting area of the dish array to be located at distances greater than 180 km from the core, with a maximum baseline of at least 3000 km. The array will provide angular resolution θ ≲ 40–2 mas at 0.5–10 GHz with image sensitivity reaching ≲50 nJy beam−1 in an 8-hour integration with 500-MHz bandwidth. Given these specifications, the high-angular-resolution component of the SKA will be capable of detecting brightness temperatures ≲200K with milliarcsecond-scale angular resolution. The aim of this article is to bring together in one place a discussion of the broad range of new and important high-angular-resolution science that will be enabled by the SKA, and in doing so, address the merits of long baselines as part of the SKA. We highlight the fact that high angular resolution requiring baselines greater than 1000 km provides a rich science case with projects from many areas of astrophysics, including important contributions to key SKA science.

Keywords

telescopes
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 29 , Issue 1 , 2012 , pp. 42 - 53
Copyright
Copyright © Astronomical Society of Australia 2012

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