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    Reassessment of an Origin of the Radio Structure of J1420-0545

    74546.pdf (633.4Kb)
    Access Status
    Open access
    Authors
    Jamrozy, M.
    Machalski, J.
    Nikiel-Wroczynski, B.
    Intema, Hubertus
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Jamrozy, M. and Machalski, J. and Nikiel-Wroczynski, B. and Intema, H. 2017. Reassessment of an Origin of the Radio Structure of J1420-0545. Astrophysical Journal. 850 (1): Article ID 7.
    Source Title
    Astrophysical Journal
    DOI
    10.3847/1538-4357/aa9182
    ISSN
    0004-637X
    Remarks

    This is an author-created, un-copy edited version of an article accepted for publication in Astrophysical Journal. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.3847/1538-4357/aa9182.

    URI
    http://hdl.handle.net/20.500.11937/74261
    Collection
    • Curtin Research Publications
    Abstract

    In this paper, we test the possibility that the structure of the largest radio galaxy J1420-0545 may have been formed by restarted rather than primary jet activity. This hypothesis was motivated by the unusual morphological properties of the source consisting of two edge-brightened, narrow, highly collinear, and symmetric lobes, thus suggesting an almost ballistic propagation of powerful jets into a particularly low-density external medium. New observations made with the VLA together with the currently available gleam and TGSS ADR1 data releases allow the detection of an excess emission at low frequencies. An extracted part (88 MHz-200 MHz) of the spectrum of the emission is fitted with the dynage model, giving a forecast for the environmental conditions and the energetic requirements for the presumed old cocoon related to a preceding epoch of jet activity.

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