Acoustic waves and the geometric scale in the solar atmosphere

Details Acoustic waves and the geometric scale in the solar atmosphere Acoustic waves and the geometric scale in the solar atmosphere

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...40..333d&link_type=abstract

Solar Physics, vol. 40, Feb. 1975, p. 333-335.

Computer Science

Sound

6

Group Velocity, H Alpha Line, Line Spectra, Phase Velocity, Solar Atmosphere, Sound Propagation, Acoustic Propagation, Chromosphere, Doppler Effect, Photosphere, Root-Mean-Square Errors, Scale Height, Solar Spectra, Traveling Waves, Vertical Distribution

Scientific paper

It is shown that the phase and group velocity of fluctuations in different solar spectral lines are equal in the high-frequency fluctuation tail where sound waves propagate. The motion of a disturbance is described, the characteristics of which agree with those of an acoustic wavefront traveling upward with gradually increasing amplitude, and the frequency and velocity of the disturbance are plotted as functions of time. Relative heights are found for regions where C I, Fe I, Na I, and H-alpha lines form, and the results are shown to agree with previous theoretical estimates.

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