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    The microarcsecond sky and cosmic turbulence

    Access Status
    Fulltext not available
    Authors
    Lazio, J.
    Cordes, J.
    de Bruyn, A.
    Macquart, Jean-Pierre
    Date
    2004
    Type
    Journal Article
    
    Metadata
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    Citation
    Lazio, T. Joseph W. and Cordes, J.M. and de Bruyn, A. G. and Macquart, J.-P. 2004. The microarcsecond sky and cosmic turbulence. New Astronomy Reviews. 48 (11-12): pp. 1439-1457.
    Source Title
    New Astronomy Reviews
    DOI
    10.1016/j.newar.2004.09.039
    ISSN
    1387-6473
    Faculty
    Faculty of Science and Engineering
    Curtin Institute of Radio Astronomy
    Remarks

    The link to the journal’s home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/426/description#description. Copyright © 2004 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/7065
    Collection
    • Curtin Research Publications
    Abstract

    Radio waves are imprinted with propagation effects from ionized media through which they pass. Owing to electron density fluctuations, compact sources (pulsars, masers, and compact extragalactic sources) can display a wide variety of scattering effects. These scattering effects, particularly interstellar scintillation, can be exploited to provide superresolution, with achievable angular resolutions ([1 las) far in excess of what can be obtained by very long baseline interferometry on terrestrial baselines. Scattering effects also provide a powerful sub-AU probe of the microphysics of the interstellar medium, potentially to spatial scales smaller than 100 km, as well as a tracer of the Galactic distribution of energy input into the interstellar medium through a variety of integrated measures. Coupled with future c-ray observations, SKA observations also may provide a means of detecting fainter compact c-ray sources. Though it is not yet clear that propagation effects due to the intergalactic medium are significant, the SKA will either detect or place stringent constraints on intergalactic scattering.

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