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NAM2012 - All Presentation Details

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Heliospheric Observations on LOFAR: First Solar Wind Obs. & Planned Future Investigations (Invited)

Author: Richard Fallows

ASTRON

Co-Authors: A.Asgekar (ASTRON); M.M.Bisi (Aberystwyth University); A.R.Breen (Aberystwyth University)

Session: INS4: LOFAR, the LOw Frequency ARray: Ongoing Developments and Early Results

Presentation type: Talk      11:45  Thursday 29th 11:45-13:15 

Summary:

The solar wind – the Sun's extended atmosphere expanding through interplanetary space – has been studied for many years using observations of interplanetary scintillation (IPS). IPS is the scintillation of radio signals from compact radio sources due to the solar wind. The extremely-long baseline (ELB) IPS experiment, where simultaneous observations are made with two antennas spaced several-hundred kilometres apart was developed at Aberystwyth University and has been used to probe the solar wind in greater detail than was previously possible. The LOw Frequency ARray (LOFAR) offers a number of advantages as an instrument for observing IPS: Multiple international ‘stations’ spread around the central core enable the ELB IPS experiment to be extended and enhanced, while the large bandwidth of up to 48 MHz, and high frequency resolution enable dynamic spectra to be calculated which will undoubtedly provide a mine of new information on solar wind micro structure. Here, we present the first IPS solar wind and dynamic spectrum results from LOFAR, as well as an insight into other planned future heliospheric investigations using LOFAR.

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