Sun-Earth Magnetic connection probed with radio bursts and magnetic field extrapolation

Details Sun-Earth Magnetic connection probed with radio bursts and magnetic field extrapolation Sun-Earth Magnetic connection probed with radio bursts and magnetic field extrapolation

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..117l&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

Energetic particles accelerated in the solar corona can be detected by spacecraft in interplanetary space provided there is either (i) a direct magnetic connection between the spacecraft and the acceleration region, or (ii) transport of particles across magnetic field lines in the corona or interplanetary space. We use type III radio bursts associated with locally produced Langmuir waves observed by the WAVES radio receiver aboard the Wind spacecraft to identify electron beams at the spacecraft and their time of release in the corona. Imaging at metre wavelengths with the Nançay Radioheliograph allows us to infer the origin of the electron beams in the corona. We thereby obtain an indication of the trajectory of electron beams from the acceleration site to 1 AU. This is compared with coronal magnetic field lines computed from a potential field model with a source surface (Schrijver and La Rosa) within 2.5 solar radii from the Sun centre and a simple Parker spiral model at greater distances. Preliminary results are presented, and their impact on the discussion of coronal and interplanetary electron transport is discussed.

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