Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh23a1830c&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH23A-1830
Astronomy and Astrophysics
Astrophysics
[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7519] Solar Physics, Astrophysics, And Astronomy / Flares, [7549] Solar Physics, Astrophysics, And Astronomy / Ultraviolet Emissions, [7554] Solar Physics, Astrophysics, And Astronomy / X-Rays, Gamma Rays, And Neutrinos
Scientific paper
We present observations of 10 microflares (B and A GOES Class) with simultaneous observations in both hard X-ray (HXR) and ultraviolet (UV/EUV) observations by RHESSI and SDO/AIA, respectively. The microflares were chosen by visually searching for time-isolated events in the available concurrent RHESSI/SDO dataset. Identifying the flare region using RHESSI imaging observations, we compare HXR (thermal and nonthermal) light curves and images with those observed by AIA in every available UV/EUV channels. Many events show complex morphologies with multiple flaring loops observed in AIA images. For the simplest event with a single flare loop, good correlation is found between the hot thermal (~10 MK) HXR emission and emission from 131 and 94 Angstrom and the filter-ratio derived temperatures agree with the HXR-derived temperatures during the decay phase. During the impulsive phase, footpoints emission was observed at all wavelengths with filter-ratios suggest the presence of multiple temperatures.
Christe Steven
Hannah Iain G.
Krucker Sa"m
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