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    Science at very high angular resolution with the square kilometre array

    Access Status
    Open access via publisher
    Authors
    Godfrey, Leith
    Bignall, Hayley
    Tingay, Steven
    Harvey-Smith, L.
    Kramer, M.
    Burke-Spolaor, S.
    Miller-Jones, James
    Johnston-Hollitt, M.
    Ekers, R
    Gulyaev, S.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    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. Science at very high angular resolution with the square kilometre array. Publications of the Astronomical Society of Australia 29 (1): pp. 42-53.
    Source Title
    Publications of the Astronomical Society of Australia
    DOI
    10.1071/AS11050
    ISSN
    1323-3580
    School
    Curtin Institute of Radio Astronomy
    URI
    http://hdl.handle.net/20.500.11937/24454
    Collection
    • Curtin Research Publications
    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 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.

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