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The nature of seismic sources associated with a proton-reach solar flare

Published online by Cambridge University Press:  01 September 2007

Valentyna V. Zharkova  and
Serhij I. Zharkov
Valentyna V. Zharkova
Affiliation:
Department of Computing and Mathematics, University of Bradford, Bradford, UK, email: v.v.zharkova@brad.ac.uk
Serhij I. Zharkov
Affiliation:
Department of Applied Mathematics, University of Sheffield, Sheffield, UK email: s.zharkov@sheffield.ac.uk
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Abstract

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The momenta and start times measured from the TD diagrams in 3 seismic sources observed in the flare of 28 October 2003 are compared with those delivered to the photosphere by different kinds of high energy particles as well as by the hydrodynamic shocks caused by these particles. The energetic protons with energy power laws combined with quasi-thermal ones are shown to form hydrodynamic shocks deeply in a flaring atmosphere which deliver the required momentum to the photosphere within a measured timescale. The seismic waves observed in two sources associated with γ-rays can be explained by the momenta produced by hydrodynamic shocks caused by mixed proton beams and jets. The seismic wave in the source asociated with HXR only and delayed by 4 and 2 minutes from the first and second HXR bursts is likely to be associated with a hydrodynamic shock occurring from precipitation of a very powerful and hard electron beam possibly mixed with quasi-thermal lower energy protons.

Keywords

Sun: activitySun: sunspotsSun: interiorSun: magnetic fieldmethods: data analysismethods: statistical
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. 59 - 65
Copyright
Copyright © International Astronomical Union 2008

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