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Title: Inferring the chromospheric magnetic topology through waves
Authors: Hasan, S. S
Steiner, O
van Ballegooijen, A
Keywords: Waves;MHD;Sun: Atmosphere;Sun: Photosphere;Sun: Chromosphere;Sun: Oscillations
Issue Date: May-2008
Publisher: Cambridge University Press
Citation: Erdelyi, Robert and Mendoza-Briceno, Cesar A., eds., Waves and oscillations in the solar atmosphere: heating and magneto-seismology., Proceedings of the 247th Symposium of the International Astronomical Union, held in Porlamar, Venezuela, 17 - 22, September, 2007., pp. 78 - 81
Series/Report no.: International Astronomical Union Symposium Proceedings Series; Vol. 247
Abstract: The aim of this work is to examine the hypothesis that the wave propagation time in the solar atmosphere can be used to infer the magnetic topography in the chromosphere as suggested by Finsterle et al. (2004). We do this by using an extension of our earlier 2-D MHD work on the interaction of acoustic waves with a flux sheet. It is well known that these waves undergo mode transformation due to the presence of a magnetic field which is particularly effective at the surface of equipartition between the magnetic and thermal energy density, the β = 1 surface. This transformation depends sensitively on the angle between the wave vector and the local field direction. At the β = 1 interface, the wave that enters the flux sheet, (essentially the fast mode) has a higher phase speed than the incident acoustic wave. A time correlation between wave motions in the non-magnetic and magnetic regions could therefore provide a powerful diagnostic for mapping the magnetic field in the chromospheric network.
Description: Open Access
ISBN: 978-0-521-87469-4
???metadata.dc.rights???: © International Astronomical Union
Appears in Collections:IIAP Publications

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