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Spectral Hardening of Large Solar Flares
Paolo C. Grigis, Arnold O. Benz
RHESSI observations are used to quantitatively study the hard X-ray evolution in 5 large solar flares selected for spectral hardening in the course of the event. The X-ray bremsstr…
X-Ray Polarization of Solar Flares Measured with Rhessi
E. Suarez-Garcia, W. Hajdas, C. Wigger +4
The degree of linear polarization in solar flares has not yet been precisely determined despite multiple attempts to measure it with different missions. The high energy range in pa…
Electron Acceleration in Solar Flares: Theory of Spectral Evolution
Paolo C. Grigis, Arnold O. Benz
Context: Stochastic acceleration is thought to be a key mechanism in the energization of solar flare electrons. Aims: We study whether stochastic acceleration can reproduce the obs…
RHESSI observation of flare elements
Paolo C. Grigis, Arnold O. Benz
RHESSI observations of elementary flare bursts are presented. These solar flare elements are distinct emission peaks of a duration of some tens of seconds present in the hard X-ray…
A broadband FFT spectrometer for radio and millimeter astronomy
Arnold O. Benz, Paolo C. Grigis, V. Hungerbuhler +4
The core architecture, tests in the lab and first results of a Fast Fourier Transform (FFT) spectrometer are described. It is based on a commercially available fast digital sampler…
Size dependence of solar X-ray flare properties
Marina Battaglia, Paolo C. Grigis, Arnold O. Benz
Non-thermal and thermal parameters of 85 solar flares of GOES class B1 to M6 (background subtracted classes A1 to M6) have been compared to each other. The hard X-ray flux has been…