A model of the oscillations in the chromosphere and transition region above sunspot umbrae

Details A model of the oscillations in the chromosphere and transition region above sunspot umbrae A model of the oscillations in the chromosphere and transition region above sunspot umbrae

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984soph...91..219z&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 91, April 1984, p. 219-234.

Physics

53

Chromosphere, Solar Oscillations, Sunspots, Umbras, Astronomical Models, Atmospheric Models, Magnetoacoustic Waves, Wave Propagation

Scientific paper

The Zhugzhda (1983) model for interpreting the 2-3 min-period velocity and intensity oscillations observed above the umbrae, which explains them in terms of the resonant transmission of slow mode magnetic-acoustic waves that are 'semitrapped' in a chromospheric cavity, is presently extended by means of more detailed calculations and corroborated in light of recently published observations. The calculations are noted to be in good agreement with the height dependence of the observed phase difference between the intensity and velocity oscillations, as well as the frequency spectrum of oscillations in the transition region above sunspots.

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