Diagnostics for propagating waves in the solar photosphere

Details Diagnostics for propagating waves in the solar photosphere Diagnostics for propagating waves in the solar photosphere

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...310..912k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 310, Nov. 15, 1986, p. 912-926.

Computer Science

Sound

7

Line Spectra, Photosphere, Solar Atmosphere, Solar Oscillations, Sound Waves, Wave Propagation, Audio Frequencies, Stellar Models, Time Dependence

Scientific paper

The effects of pure acoustic waves of different frequencies on a number of Fe I lines formed in the photosphere are investigated. A dynamical model of the waves which considers velocity, temperature, and pressure fluctuations as functions of time is used to compute the line profiles. The extent to which the waves cause the lines to fluctuate, the time-averaged properties of the line profiles, and the measurability of vertical phase differences are all determined as functions of the frequency of the propagating wave. It is concluded that there is no intrinsic radiative limit, for frequencies of current observational interest, on ability to measure phase differences. The asymmetry induced by the propagation of acoustic waves in the photosphere is found to depend on the frequency of the waves. Acoustic waves contribute only marginally to line broadening.

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