EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Observing solar wind turbulence in the corona with ground-based radio telescopes

Du Toit Strauss1, Gert Botha2, James Chibueze1, Eduard Kontar3, Eugene Engelbrecht1, Stefan Lotz4, Robert Wicks2, Vratislav Krupar5, Stuart Bale6, Shimul Maharaj4, Natasha Jeffrey2, Amore Nel4, Ruhann Steyn1, and Jabus van den Berg1
Du Toit Strauss et al.
  • 1Center for Space Research, North-West University, Potchefstroom, South Africa (
  • 2Northumbria University, Newcastle upon Tyne, United Kingdom (
  • 3University of Glasgow, Glasgow, United Kingdom, UK (
  • 4South African National Space Agency, Hermanus, South Africa (
  • 5NASA Goddard Space Flight Center, Washington DC, USA (
  • 6University of California, Berkeley, USA (

When point-like galactic and extragalactic radio sources are observed through the solar corona by ground-based radio telescopes, plasma density fluctuations in the turbulent solar wind scatter these photons, leading to an observed broadening and/or elongation of such sources. By observing this broadening for several sources, over several days, we can get information about e.g. the wavenumber and radial dependence of solar wind density fluctuations at very small scales (~30m - 8km) inside the Alfven radius, thereby capturing details of the turbulence dissipation range. Here, we present very initial results of such a study with the MeerKAT radio telescope in South Africa (being, of course, a precursor to the much larger Square Kilometer Array, SKA), discuss the preliminary results, and compare these with theoretical estimates and previous observations.

How to cite: Strauss, D. T., Botha, G., Chibueze, J., Kontar, E., Engelbrecht, E., Lotz, S., Wicks, R., Krupar, V., Bale, S., Maharaj, S., Jeffrey, N., Nel, A., Steyn, R., and van den Berg, J.: Observing solar wind turbulence in the corona with ground-based radio telescopes, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-14180,, 2021.

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