Other
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338..538c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 1, 1989, p. 538-556.
Other
103
Chromosphere, Magnetic Effects, Solar Magnetic Field, Solar Oscillations, Solar Wind, Magnetoacoustic Waves, Sunspots, Vibration Mode
Scientific paper
The influence of a chromospheric magnetic field on p- and f-mode frequencies is evaluated theoretically for a simple model of the solar plasma, consisting of a polytrope in the solar interior, above which is an isothermal atmosphere. The atmosphere is permeated by a horizontal magnetic field. Frequency changes and shifts in phase factors due to the presence of a magnetic atmosphere are calculated analytically in the long-wavelength limit, and numerically for arbitrary wavelength. The results reveal that, at low to moderate degree l, an increase in chromospheric magnetic field leads to a frequency increase for the n = 1 p-mode, whereas the overtones (n = 2, 3, etc.) suffer a frequency decrease. At high l, all the p-modes suffer a frequency decrease.
Campbell Robert W.
Roberts Barney B.
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