Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Power-law models of totally anisotropic scattering

    193261_97456_MNRAS-2013-Tuntsov-2562-8_1_.pdf (471.1Kb)
    Access Status
    Open access
    Authors
    Tuntsov, A.
    Bignall, Hayley
    Walker, M.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Tuntsov, A.V. and Bignall, H.E. and Walker, M.A. 2013. Power-law models of totally anisotropic scattering. Monthly Notices of the Royal Astronomical Society. 429 (3): pp. 2562-2568.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/sts527
    ISSN
    0035-8711
    Remarks

    Copyright © 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.

    URI
    http://hdl.handle.net/20.500.11937/8456
    Collection
    • Curtin Research Publications
    Abstract

    The interstellar scattering responsible for pulsar parabolic arcs, and for intraday variability of compact radio quasars, is highly anisotropic in some cases. We numerically simulate these observed phenomena using totally anisotropic, power-law models for the electron density fluctuations which cause the scattering. By comparing our results to the scattered image of PSR B0834+06 and, independently, to dual-frequency light curves of the quasar PKS 1257−326, we constrain the nature of the scattering media on these lines of sight. We find that models with spectral indices slightly below β = 3, including the one-dimensional Kolmogorov model, are broadly consistent with both data sets. We confirm that a single physical model suffices for both sources, with the scattering medium simply being more distant in the case of B0834+06. This reinforces the idea that intraday variability and parabolic arcs have a common cause in a type of interstellar structure which, though obscure, is commonplace. However, the implied gas pressure fluctuations are large compared to typical interstellar pressures, and the magnetic stresses are much larger still. Thus while these scattering media may be commonplace, their underlying dynamics appear quite extraordinary.

    Related items

    Showing items related by title, author, creator and subject.

    • X-ray and neutron scattering of multiferroic LuFe2O4
      Lawrence, Shane Michael (2011)
      Multiferroic materials have recently begun to attract significant scientific interest due to their potential applications in the design of modern electronic devices. Currently, the magnetic properties of materials form ...
    • Scattering analysis of LOFAR pulsar observations
      Geyer, M.; Karastergiou, A.; Kondratiev, V.; Zagkouris, K.; Kramer, M.; Stappers, B.; Grießmeier, J.; Hessels, J.; Michilli, D.; Pilia, M.; Sobey, Charlotte (2017)
      © 2017 The Authors Published by Oxford University Press. We measure the effects of interstellar scattering on average pulse profiles from 13 radio pulsars with simple pulse shapes. We use data from the LOFAR High Band ...
    • Creation, destruction, and transfer of atomic multipole moments by electron scattering: relativistic treatment 1
      Csanak, G.; Fontes, C.; Kilcrease, D.; Fursa, Dmitry (2011)
      We have obtained expressions for the creation, destruction, and transfer of atomic multipole moments by electron scattering under relativistic conditions. More specifically, we have obtained separate expressions for ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.