Solar flares are observed at all wavelengths from decameter radio waves to gamma-rays
beyond 1 GeV. This review focuses on recent observations in EUV, soft and hard X-rays …

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 …

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 …

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 …

ABSTRACT The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) and
the Nobeyama Radioheliograph (NoRH) are used to investigate coronal hard X-ray and …

The 2014 March 29 X1 solar flare (SOL20140329T17: 48) produced bright continuum
emission in the far-and near-ultraviolet (NUV) and highly asymmetric chromospheric …

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 …

During solar flares, a large flux of energetic electrons propagate from the tops of
reconnecting magnetic flux tubes toward the lower atmosphere. Over the course of the …

Hard X-ray (HXR) spectral breaks are explained in terms of a one-dimensional model with a
cospatial return current. We study 19 flares observed by the Ramaty High Energy Solar …

ABSTRACT I obtain and examine the implications of one-dimensional analytic solutions for
return-current losses on an initially power-law distribution of energetic electrons with a sharp …