First local helioseismic experiments with CO 5 BOLD

With numerical experiments we explore the feasibility of using high frequency waves for probing the magnetic fields in the photosphere and the chromosphere of the Sun.We track a plane‐parallel, monochromatic wave that propagates through a non‐stationary, realistic atmosphere, from the convection‐zon...

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Bibliographic Details
Published in:Astronomische Nachrichten 2007-03, Vol.328 (3-4), p.323-328
Main Authors: Steiner, O., Vigeesh, G., Krieger, L., Wedemeyer‐Böhm, S., Schaffenberger, W., Freytag, B.
Format: Article
Language:English
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Summary:With numerical experiments we explore the feasibility of using high frequency waves for probing the magnetic fields in the photosphere and the chromosphere of the Sun.We track a plane‐parallel, monochromatic wave that propagates through a non‐stationary, realistic atmosphere, from the convection‐zone through the photosphere into the magnetically dominated chromosphere, where it gets refracted and reflected. We compare the wave travel time between two fixed geometrical height levels in the atmosphere (representing the formation height of two spectral lines) with the topography of the surface of equal magnetic and thermal energy density (the magnetic canopy or β = 1 contour) and find good correspondence between the two. We conclude that high frequency waves indeed bear information on the topography of the ‘magnetic canopy’. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0004-6337
1521-3994
DOI:10.1002/asna.200610738