The Sun as a particle accelerator: hard X-ray and γ-ray diagnostics of energetic particles

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Sun, Flares, Particle Acceleration, X-Rays, Gamma-Rays

Scientific paper

Explosive phenomena of magnetic energy conversion in the solar corona lead to the production of energetic particles at all energies. While some fast particles (electrons and ions) produce high energy radiation when interacting with the solar atmosphere (X-rays,γ-rays), others escape in the corona and interplanetary medium, produce radio emission and may eventually reach the Earth's orbit. I shall illustrate here with some high-energy observations the properties that can be derived on energetic particles. I will concentrate on some of the observations obtained in the last years at high spectral resolution with RHESSI and INTEGRAL/SPI and on the spatially resolved observations provided by RHESSI. I shall present some open questions still being discussed and give a brief overview of future observations in the field of high energy solar physics.

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