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Title:
HXR photospheric footprints
Authors:
Martínez-Oliveros, J. C.; Donea, A.-C.; Cally, P. S.
Affiliation:
AA(Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences Monash University, VIC 3800, Australia email:), AB(Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences Monash University, VIC 3800, Australia email:), AC(Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences Monash University, VIC 3800, Australia email:)
Publication:
Waves & Oscillations in the Solar Atmosphere: Heating and Magneto-Seismology, Proceedings of the International Astronomical Union, IAU Symposium, Volume 247, p. 110-113
Publication Date:
05/2008
Origin:
CUP
Keywords:
Sun: X-rays, Sun: particle acceleration, Sun: helioseismology, Sun: sun quakes, Sun: solar flares
DOI:
10.1017/S1743921308014750
Bibliographic Code:
2008IAUS..247..110M

Abstract

We have analysed the 6 mHz egression power signatures of some accoustically active X-class solar flares. During the impulsive phase these flares produced conspicuous seismic signatures which have kernel-like structures, mostly aligned with the neutral line of the host active region. The kernel-like structures show the effect of constructive interference of the acoustic waves emanating from the complex sources, suggesting motion of the acoustic sources. The co-aligment between the seismic signatures and the hard X-ray emission observed by RHESSI from the footpoints of the coronal loops suggests a direct link between relativistic particles accelerated during the flare and the hydrodynamic response of the photosphere during flares.
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