Effects of fibril magnetic fields on solar p-modes. II - Calculation of mode frequency shifts

Details Effects of fibril magnetic fields on solar p-modes. II - Calculation of mode frequency shifts Effects of fibril magnetic fields on solar p-modes. II - Calculation of mode frequency shifts

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308..401z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 1, 1986, p. 401-412.

Astronomy and Astrophysics

Astrophysics

27

Frequency Shift, Magnetic Flux, Solar Magnetic Field, Solar Oscillations, Magnetohydrodynamics, Photosphere, Ray Tracing, Wave Propagation, Wentzel-Kramer-Brillouin Method

Scientific paper

The influence of magnetic flux tubes embedded in the solar convection zone on the observed p-mode oscillation frequencies are estimated by WKB ray tracing in a model of the solar interior. For randomly distributed but parallel magnetic fibrils with radii small compared to the wavelength of the mode, a local correction to the acoustic dispersion relation can be calculated exactly. The results show that if the observed photospheric flux remains vertically oriented deep into the convection zone, then only modes which are confined to within 0.5% R_sun; of the solar surface are shifted in frequency by as much as 0.1%.

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