High-energy X-rays and γ-rays from solar flares were discovered just over fifty years ago.
Since that time, the standard for the interpretation of spatially integrated flare X-ray spectra at …

The first flare on the Sun was observed exactly 150 years ago. During most of the long
history, only secondary effects have been noticed, so flares remained a riddle. Now the …

We present a unified computational framework that can be used to describe impulsive flares
on the Sun and on dMe stars. The models assume that the flare impulsive phase is caused …

We review basic theoretical concepts in particle acceleration, with particular emphasis on
processes likely to occur in regions of magnetic reconnection. Several new developments …

We describe a new approach for modeling the transport of high-energy particles accelerated
during flares from the acceleration region in the solar corona until their eventual …

We compare hard X-ray (HXR) photon spectra observed by the RHESSI with the spectra of
the electrons in the associated solar impulsive particle events observed near 1 AU by the …

During solar flares a tremendous amount of magnetic energy is released and transported
through the Sun's atmosphere and out into the heliosphere. Despite over a century of study …

The idea for this book emerged over a number of years as the authors participated in various
research projects related to analysis and interpretation of data from NASA's RHESSI Small …

The observed hard X-ray (HXR) flux spectrum from solar flares is a combination of primary
bremsstrahlung photons with a spectrally modified component from photospheric Compton …

Context. The collisional thick target model (CTTM) of solar hard X-ray (HXR) bursts has
become an almost “standard model” of flare impulsive phase energy transport and radiation …