Helioseismic frequency shifts due to steady states

Details Helioseismic frequency shifts due to steady states Helioseismic frequency shifts due to steady states

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.464..203e&link_type=abstract

In: Proceedings of the SOHO 10/GONG 2000 Workshop: Helio- and asteroseismology at the dawn of the millennium, 2-6 October 2000,

Computer Science

3

P- And F-Modes, Steady Flow, Frequency Shifts

Scientific paper

A three layer model of the Sun is presented for the study of p- and f-modes. Frequency shifts due to the combined effects of an atmospheric magnetic field and subsurface equilibrium flows are evaluated by deriving and solving the dispersion relation. An increase in the chromospheric temperature can not only reduce but also raise the frequencies of p- and f-modes when a background magnetic field is present. Beside flow effects the effect of changing the height of the magnetic canopy is also examined. A comparison of our theoretical results with recent observational data shows an excellent agreement.

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