Rapid Changes of Electron Acceleration Characteristics at the End of the Impulsive Phase of an X-class Solar Flare

@inproceedings{Warmuth2009RapidCO,
  title={Rapid Changes of Electron Acceleration Characteristics at the End of the Impulsive Phase of an X-class Solar Flare},
  author={Alexander Warmuth and Gordon D. Holman and Brian R. Dennis and Gemma. Mann and Henry Aurass and Ryan Milligan},
  year={2009}
}
We present a detailed spectral analysis of the X1.3 flare of 2005 January 19 using hard X-ray (HXR) spectra obtained with RHESSI. This flare exhibits HXR pulses during the impulsive phase, with a particularly pronounced peak at the end of the impulsive phase. This peak is associated with HXR emission up to high energies (>300 keV) but does not show any Neupert effect (i.e., no simultaneous rise in soft X-rays). Fitting the spatially integrated photon spectra with a Maxwellian plus a nonthermal… CONTINUE READING