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HXR photospheric footprints

Published online by Cambridge University Press:  01 September 2007

J. C. Martínez-Oliveros ,
A.-C. Donea  and
P. S. Cally
J. C. Martínez-Oliveros
Affiliation:
Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences Monash University, VIC 3800, Australia email:Juan.Oliveros@sci.monash.edu.au
A.-C. Donea
Affiliation:
Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences Monash University, VIC 3800, Australia email:Juan.Oliveros@sci.monash.edu.au
P. S. Cally
Affiliation:
Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences Monash University, VIC 3800, Australia email:Juan.Oliveros@sci.monash.edu.au
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Abstract

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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.

Keywords

Sun: X-raysSun: particle accelerationSun: helioseismologySun: sun quakesSun: solar flares
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S247: Waves & Oscillations in the Solar Atmosphere: Heating and Magneto-Seismology , September 2007 , pp. 110 - 113
Copyright
Copyright © International Astronomical Union 2008

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