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Very High Angular Resolution Science with the Square Kilometre Array

Godfrey, L. E. H. and Bignall, H. and Tingay, S. and Harvey-Smith, L. and Kramer, M. and Burke-Spolaor, S. and Miller-Jones, J. C. A. and Johnston-Hollitt, M. and Ekers, R. and Gulyaev, S. (2012) Very High Angular Resolution Science with the Square Kilometre Array. Publications of the Astronomical Society of Australia, 29 (1). pp. 42-53. ISSN 1323-3580. http://resolver.caltech.edu/CaltechAUTHORS:20130214-090259154

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Abstract

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 ~ 40 - 2 mas at 0.5 - 10 GHz with image sensitivity reaching < 50 nJy/beam 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 < 200 K 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1111.6398v1arXivUNSPECIFIED
http://www.publish.csiro.au/view/journals/dsp_journal_fulltext.cfm?nid=138&f=AS11050PublisherUNSPECIFIED
http://dx.doi.org/10.1071/AS11050DOIUNSPECIFIED
Additional Information:Received 2011 September 14, accepted 2011 November 24, published online 2011 December 16 We wish to thank the following people for helpful discussions: Joe Lazio, Clancy James, Jane Greaves, Richard Dodson, Maria Rioja and Tim Colegate.
Group:TAPIR
Non-Subject Keywords:telescopes
Record Number:CaltechAUTHORS:20130214-090259154
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130214-090259154
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36919
Collection:CaltechAUTHORS
Deposited By: JoAnn Boyd
Deposited On:20 Feb 2013 19:48
Last Modified:20 Feb 2013 19:48

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