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    Wide-field imaging and polarimetry for the biggest and brightest in the 20-GHz southern sky

    Access Status
    Open access via publisher
    Authors
    Burke-Spolaor, S.
    Ekers, Ronald
    Massardi, M.
    Murphy, T.
    Partridge, B.
    Ricci, R.
    Sadler, E.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Burke-Spolaor, S. and Ekers, R. and Massardi, M. and Murphy, T. and Partridge, B. and Ricci, R. and Sadler, E. 2009. Wide-field imaging and polarimetry for the biggest and brightest in the 20-GHz southern sky. Monthly Notices of the Royal Astronomical Society. 395 (1): pp. 504-517.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1111/j.1365-2966.2009.14556.x
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy (Engineering)
    URI
    http://hdl.handle.net/20.500.11937/13632
    Collection
    • Curtin Research Publications
    Abstract

    We present the wide-field imaging and polarimetry at ? = 20 GHz of seven most extended, bright (Stotal = 0.50 Jy), high-frequency selected radio sources in the southern sky with declinations d < -30°. Accompanying the data are brief reviews of the literature for each source. The results presented here aid in the statistical completeness of the Australia Telescope 20-GHz Survey: the Bright Source Sample. The data are of crucial interest for future cosmic microwave background missions as a collection of information about candidate calibrator sources. We were able to obtain data for seven of the nine sources identified by our selection criteria. We report that Pictor A is thus far the best extragalactic calibrator candidate for the Low Frequency Instrument of the Planck European Space Agency mission due to its high level of integrated polarized flux density (~0.50 ± 0.06 Jy) on a scale of 10 arcmin. Six out of the seven sources have a clearly detected compact radio core in our images, with either a null detection or less than 2 per cent detection of polarized emission from the nuclei. Most sources with detected jets have magnetic field alignments running in a longitudinal configuration, however, PKS 1333-33 exhibits transverse fields and an orthogonal change in field geometry from nucleus to jets. © 2009 RAS.

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