Wave propagation in the quiet solar chromosphere

Details Wave propagation in the quiet solar chromosphere Wave propagation in the quiet solar chromosphere

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977soph...52..283m&link_type=abstract

Solar Physics, vol. 52, May 1977, p. 283-292.

Physics

27

Chromosphere, Magnetohydrodynamic Waves, Solar Atmosphere, Solar Spectra, Wave Propagation, Doppler Effect, Line Spectra, Magnetoacoustic Waves, Power Spectra

Scientific paper

The phase lag between intensity and velocity oscillations in chromospheric Ca II lines is analyzed. Plots are presented which show power spectra for the intensity fluctuations in three Ca II lines, the coherence between intensities and velocities for the same lines, the phase lag between intensity fluctuations and Doppler shifts, and amplitude ratios for the different lines. The phase lags for each line are found to be generally near 90 deg for frequencies up to 12 to 15 mHz regardless of position in the chromospheric network. The results obtained are compared with previous findings for other chromospheric lines, and several simplified MHD models of wave propagation in the chromosphere are examined.

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