Observation of a Faraday Rotation Transient Associated with a Coronal Mass Ejection

Details Observation of a Faraday Rotation Transient Associated with a Coronal Mass Ejection Observation of a Faraday Rotation Transient Associated with a Coronal Mass Ejection

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.0401s&link_type=abstract

American Astronomical Society, AAS Meeting #212, #4.01; Bulletin of the American Astronomical Society, Vol. 40, p.193

Astronomy and Astrophysics

Astronomy

Scientific paper

During recent polarization observations with the NRAO Very Large Array radio telescope to measure the coronal magnetic field (reported in Ingleby et al 2007, ApJ 668, 520), a coronal mass ejection (CME) occurred. The day of the observations was March 12, 2005, and the CME occurred on the east limb of the Sun. Our polarization observations were sufficient to measure a temporal change in the Faraday rotation measure (RM), apparently due to the CME, along the line of sight to the radio source 2337-025. The magnitude of the RM was 10 rad/sq-m, and began before the line of sight was occulted by the white light CME. Our measured value is comparable to predictions of RM variations due to model CMEs.

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