Hard X-ray morphology of the X1.3 April 25, 2014 partially occulted limb solar flare

Abstract

At hard X-ray energies, the bright footpoint emission from solar flare loops often prevents a detailed analysis of the weaker loop-top source morphology due to the limited dynamic range available for X-ray imaging. Here, we study the X1.3 April 25, 2014 flare with the Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI). This partially occulted limb flare allows the analysis of the loop-top emission in isolation. We present results on the flare light curve at different energies, the source morphology from X-ray imaging and a detailed spectral analysis of the different source components by imaging spectroscopy. The loop-top source, a likely site of particle acceleration, shows a clear composition of different emission components. The results indicate the opportunities that detailed imaging of hard X-rays can provide to learn about particle acceleration, transport and heating processes in solar flares.

arXiv comment5 pages, 4 figures, submitted as conference proceedings for the 15th Annual International Astrophysics Conference

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Cited by in corpus (5)

• Hard X-Ray Emission from Partially Occulted Solar Flares: RHESSI Observations in Two Solar Cycles
• Double Coronal X-ray and Microwave Sources Associated With A Magnetic Breakout Solar Eruption
• The Relation Between Escape and Scattering Times of Energetic Particles in a Turbulent Magnetized Plasma: Application to Solar Flares
• Multi-wavelength Study of Energetic Processes during Solar Flares occurrence
• GOES class estimation for behind-the-limb solar flares using MESSENGER SAX