VLA, SOHO and RHESSI Observations of Evolving Type I Noise Storms, Evolving Coronal Loops and Coronal Mass Ejections

Details VLA, SOHO and RHESSI Observations of Evolving Type I Noise Storms, Evolving Coronal Loops and Coronal Mass Ejections VLA, SOHO and RHESSI Observations of Evolving Type I Noise Storms, Evolving Coronal Loops and Coronal Mass Ejections

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp43a..01w&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SP43A-01

Physics

7509 Corona, 7513 Coronal Mass Ejections (2101), 7534 Radio Emissions

Scientific paper

Very Large Array (VLA) observations at 91 and 400 cm wavelength have been combined with data from the SOHO, RHESSI and TRACE solar missions to study the relationship between evolving magnetic loops, Type I noise storms and coronal mass ejections in the low and middle corona. The radio observations provide information about the medium-sized and large-scale magnetic structures in the corona where nonthermal particle acceleration and energy release take place and where CMEs are initiated and propagate. On one day, the passage of a CME and an associated EUV ejection event coincided with changes in the 91 cm brightness temperature of the noise storm located along the path of the CME . We discuss how the energy deposited into the corona by the CME may have caused a local increase in the thermal or nonthermal electron density or in the electron temperature in the middle corona resulting in a transient increase in the brightness of the 91 noise storm. Changes in the associated EUV loop structure associated with the early onset of the CMEs suggest ongoing magnetic reconfiguration of the regions. These changes may result in the plasma heating and turbulence that is thought to initiate and sustain the long-lasting plasma emission of Type I noise storms.

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