Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh33a2038k&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH33A-2038
Astronomy and Astrophysics
Astrophysics
[7507] Solar Physics, Astrophysics, And Astronomy / Chromosphere, [7514] Solar Physics, Astrophysics, And Astronomy / Energetic Particles, [7519] Solar Physics, Astrophysics, And Astronomy / Flares, [7554] Solar Physics, Astrophysics, And Astronomy / X-Rays, Gamma Rays, And Neutrinos
Scientific paper
Using simultaneous RHESSI and SDO data, we study chromospheric heights of hard X-ray (HXR), EUV and white-light continuum sources in a well observed gamma-ray solar flare. HXr visibility approach allows us to determine the height of the HXR sources as a function of energy above the photosphere. Co-aligning AIA/SDO and HMI/SDO images with 35-100 keV HXR RHESSI data, we infer the heights and characteristic densities of HXR, EUV and continuum sources in a flaring footpoint. The maximum of white-light emission appears between the HXR and EUV emission presumably in the transition between ionized and neutral atmospheres. We note that the energy deposited by low energy electrons is sufficient to explain the energetics of optical and UV emissions.
Battaglia Marina
Kontar Eduard P.
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