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    Time domain studies of Active Galactic Nuclei with the Square Kilometre Array

    238390_238390.pdf (629.8Kb)
    Access Status
    Open access
    Authors
    Bignall, Hayley
    Croft, S.
    Hovatta, T.
    Koay, J.
    Lazio, J.
    Macquart, Jean-Pierre
    Reynolds, Cormac
    Date
    2015
    Type
    Conference Paper
    
    Metadata
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    Citation
    Bignall, H. and Croft, S. and Hovatta, T. and Koay, J. and Lazio, J. and Macquart, J. and Reynolds, C. 2015. Time domain studies of Active Galactic Nuclei with the Square Kilometre Array. Proceedings of Science. AASKA14 (058).
    Source Conference
    Advancing Astrophysics with the Square Kilomentre Array
    Additional URLs
    http://pos.sissa.it/archive/conferences/215/058/AASKA14_058.pdf
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    This open access article is distributed under the Creative Commons license https://creativecommons.org/licenses/by-nc/4.0/

    URI
    http://hdl.handle.net/20.500.11937/6278
    Collection
    • Curtin Research Publications
    Abstract

    Variability of radio-emitting active galactic nuclei can be used to probe both intrinsic variations arising from shocks, flares, and other changes in emission from regions surrounding the central supermassive black hole, as well as extrinsic variations due to scattering by structures in our own Galaxy. Such interstellar scattering also probes the structure of the emitting regions, with microarcsecond resolution. Current studies have necessarily been limited to either small numbers of objects monitored over long periods of time, or large numbers of objects but with poor time sampling. The dramatic increase in survey speed engendered by the Square Kilometre Array will enable precision synoptic monitoring studies of hundreds of thousands of sources with a cadence of days or less. Statistics of variability, in particular concurrent observations at multiple radio frequencies and in other bands of the electromagnetic spectrum, will probe accretion physics over a wide range of AGN classes, luminosities, and orientations, as well as enabling a detailed understanding of the structures responsible for radio wave scattering in the Galactic interstellar medium.

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