Investigating The Magnetic Field of The Solar Corona With Pulsars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We propose a novel experiment to examine both the magnetic field and electron content of the solar corona. We intend to measure the Faraday rotation and dispersion evident in observations of background pulsar sources as they are occulted by the Sun. As we will be utilising a number of simultaneous lines of sight, that will cut different paths through the corona as the Sun rotates, we will be able to strongly constrain the global topology of both the plasma and the magnetic field. Although similar experiments have been performed using other background radio sources and space probes; this experiment differs in that many lines of sight can be examined simultaneously, and the Magnetic field and plasma density can be measured independently. We propose to use the Parkes radio telescope to observe a number of pulsars as they are occulted by the Sun in December 2006. We present an outline of the experiment and a discussion of the expected results.

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