Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh23a1520h&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SH23A-1520
Astronomy and Astrophysics
Astrophysics
[7519] Solar Physics, Astrophysics, And Astronomy / Flares, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7554] Solar Physics, Astrophysics, And Astronomy / X-Rays, Gamma Rays, And Neutrinos
Scientific paper
An asymmetric hard X-ray (HXR) characteristic in conjugate footpoints of newly reconnected magnetic fields, i.e. stronger HXR emissions with weaker magnetic fields and vice versa, is commonly observed in solar flares. It can be explained by the asymmetric magnetic mirroring that weaker magnetic fields would result in higher precipitation rate of energetic electrons from corona to chromosphere and thus stronger HXR emissions could be observed. However, the stronger HXR kernel being located at the footpoint of stronger magnetic field is also found in some flares. To determine the significance of magnetic mirroring effect in flares, the ratio of HXR fluxes in conjugate HXR footpoints observed by RHESSI and magnetic field strengths observed by MDI will be examined in this study. The time evolution of such ratio will be discussed as well.
Cheng C. Z.
Hsieh Michael
Yang Yadong
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