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Numerical simulation of wave propagation in magnetic network

Published online by Cambridge University Press:  01 September 2008

G. Vigeesh ,
S. S. Hasan  and
O. Steiner
G. Vigeesh
Affiliation:
Indian Institute of Astrophysics, Bangalore-560034, India email: [email protected], [email protected]
S. S. Hasan
Affiliation:
Indian Institute of Astrophysics, Bangalore-560034, India email: [email protected], [email protected]
O. Steiner
Affiliation:
Kiepenheuer-Institut für Sonnenphysik, 79104 Freiburg, Germany email: [email protected]
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Abstract

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We present 2-D numerical simulations of wave propagation in the magnetic network. The network is modelled as consisting of individual magnetic flux sheets located in intergranular lanes. They have a typical horizontal size of about 150 km at the base of the photosphere and expand upward and become uniform. We consider flux sheets of different field strengths. Waves are excited by means of transverse motions at the lower boundary, to simulate the effect of granular buffeting. We look at the magneto-acoustic waves generated within the flux sheet and the acoustic waves generated in the ambient medium due to the excitation. We calculate the wave energy fluxes separating them into contributions from the acoustic and the Poynting part and study the effect of the different field strengths.

Keywords

Sun: magnetic fields – magnetohydrodynamics (MHD) – Sun: photosphere – oscillations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S257: Universal Heliophysical Processes , September 2008 , pp. 185 - 187
Copyright
Copyright © International Astronomical Union 2009

References

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