First local helioseismic experiments with CO5BOLD

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-zo...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Steiner, O, Vigeesh, G, Krieger, L, Wedemeyer-Böhm, S, Schaffenberger, W, Freytag, B
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 05.01.2007
Subjects
Canopies
Chromosphere
Convection
Flux density
High frequencies
Line spectra
Photosphere
Thermal energy
Topography
Travel time
Online AccessGet full text

Cover

More Information
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 beta=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'.
ISSN:2331-8422
DOI:10.48550/arxiv.0701029