Radio Observations And Modeling Of A Post-flare Arcade

Details Radio Observations And Modeling Of A Post-flare Arcade Radio Observations And Modeling Of A Post-flare Arcade

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21632105b&link_type=abstract

American Astronomical Society, AAS Meeting #216, #321.05; Bulletin of the American Astronomical Society, Vol. 41, p.912

Astronomy and Astrophysics

Astronomy

Scientific paper

We present observations of a flaring arcade which was observed by RHESSI, TRACE and the Nobeyama Radioheliograph (NoRH). The event occurred on the west limb of the Sun and whilst EUV observations reveal an arcade structure, the radio emission appears as a single loop. NoRH observations at 17 GHz and 34 GHz show that the spatial distribution of brightness varies along the loop and the relative brightness of looptop and footpoint sources varies over time. We concentrate our investigation on the decay phase of the flare and using estimates of relevant plasma parameters obtained from observations, we attempt to reproduce the observed radio emission. We compare the gyrosynchrotron emission from both a simple dipole and an arcade magnetic field model to investigate line of sight enhancements from optically thin plasma. Using a continuous thermal/nonthermal electron distribution we investigate the contribution from hot thermal plasma. This work was funded by an STFC studentship.

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