We present a brief review of the contemporary understanding of and topical problems in
solar flare physics that can be clarified by methods of X-ray and gamma-ray astronomy. The …

Driven by recent RHESSI observations of confined loop-top hard X-ray sources in solar
flares, we consider stochastic acceleration of electrons in the presence of Coulomb …

Context. Twisted coronal loops should be ubiquitous in the solar corona. Twisted magnetic
fields contain excess magnetic energy, which can be released during magnetic …

We report analysis of three solar flares that occur within 1 of limb passage, with the goal to
investigate the source height of chromospheric footpoints in white light (WL) and hard X-rays …

We analyse particle acceleration in explosive reconnection events in magnetically
dominated proton–electron plasmas. Reconnection is driven by large-scale magnetic …

A solar type-I noise storm is produced by accelerated particle beams generated at active
regions undergoing magnetic field restructuring. Their intensity varies by orders of …

We present a novel numerical scheme for simulating the motion of relativistic charged
particles in magnetospheres of compact objects, typically filled with highly magnetized …

Context. Twisted magnetic fields should be ubiquitous in the solar corona, particularly in
flare-producing active regions where the magnetic fields are strongly non-potential. The …

The aim of this study is to generate maps of the hard X-ray emission produced by energetic
electrons in a solar flare and compare them with observations. The ultimate goal is to test the …

Observations with RHESSI have enabled the detailed study of the structure of dense hard X-
ray coronal sources in solar flares. The variation of source extent with electron energy has …