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NAM2011 Presentation Details

Record 301 of 382

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Radio Remote-Sensing Studies of the Inner Heliosphere

Author: Mario M. Bisi

Institute of Mathematics and Physics, Aberystwyth University

Co-Authors: R.A. Fallows (Institute of Mathematics and Physics, Aberystwyth University), A.R. Breen (Institute of Mathematics and Physics, Aberystwyth University), E.A. Jensen (ACS Consulting, Houston), J.M. Clover (Center for Astrophysics and Space Sciences, University of California, San Diego), P.K. Manoharan (Radio Astronomy Centre, National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Ooty), B.V. Jackson (Center for Astrophysics and Space Sciences, University of California, San Diego), P.P. Hick (Center for Astrophysics and Space Sciences/San Diego Supercomputer Center, University of California, San Diego), J.A. Davies (STFC Rutherford Appleton Laboratory), M.J. Owens (Space Environment Physics Group, Department of Meteorology, University of Reading), and S. Hardwick (Institute of Mathematics and Physics, Aberystwyth University).

Session: RAD: Radio window on the solar system

Presentation type: Poster

Summary:

Radio remote-sensing observations of the inner heliosphere can be undertaken by both the observation of interplanetary scintillation (IPS) of astronomical radio sources and also the observation of Faraday rotation (FR) of spacecraft or astronomical radio sources. The data sets from various IPS-capable systems are used with the University of California, San Diego (UCSD) three-dimensional (3-D) tomographic-reconstruction and visualisation algorithms. We are able to make comparisons with multi-point it in-situ measurements from various deep-space spacecraft using our reconstruction results. This makes possible the study of structure in the inner heliosphere as a whole as well as the ability to isolate individual features or events such as interplanetary coronal mass ejections (ICMEs) or stream interaction regions (SIRs). FR is the rotation that occurs as an electromagnetic wave traverses a birefringent medium such as the solar corona and inner heliosphere. FR is the integrated product of the electron density and the component of the solar magnetic field parallel to the wave vector of the electromagnetic wave. We will present and discuss the most-recent radio remote-sensing observations of the inner heliosphere using the newly-operational LOw Frequency ARray (LOFAR) as well as those results from other radio-capable systems. We will also investigate the global structure of the heliosphere during the current and previous solar minima using radio-based data primarily, and discuss similarities and differences between the two solar cycles where possible.

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