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Resonant absorption and the spectrum of 5-min oscillations of the Sun
II. Fine structure of the spectrum of 5-min oscillations
Received 10 May 1999 / Accepted 15 October 1999
The influence of magnetic field on the spectrum of 5-min solar oscillations has been investigated. The calculations have been made within a model of the two-layer shell. The lower non-magnetized layer is characterized by linear decrease of temperature with height while in the upper layer with homogeneous horizontal magnetic field temperature increase, and reaches a coronal value at the height of about 2500. It is shown that, accounting for resonant absorption, the spectrum of 5-min oscillations has fine structure, which is most noticeable in high - degree modes.
Key words: Sun: oscillations Sun: chromosphere Magnetohydrodynamics (MHD)
© European Southern Observatory (ESO) 2000