Physics
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...69..233w&link_type=abstract
Solar Physics, vol. 69, Feb. 1981, p. 233-238.
Physics
33
Astronomical Spectroscopy, Chromosphere, Solar Atmosphere, Solar Oscillations, Solar Spectra, Calcium, Data Reduction, Faculae, High Resolution, Line Spectra, Nitrogen, Photosphere, Power Spectra, Sodium
Scientific paper
The paper compares temporal power spectra of solar atmospheric oscillations in plage and quiet regions occurring on different parts of a time series of high-quality spectrograms. The main differences between oscillation amplitudes in plages and quiet regions are: (1) greatly increased long period (not less than 300 s) power in the chromospheric parts of the plage where the 8542-A line is formed, (2) a reduction of amplitude for intermediate periods (300-100 s) in the photospheric and low chromospheric parts of the plage where Na D1 and Ni 5893 A are formed, and (3) a marked reduction in amplitude of short period (less than 100 s) oscillations in Na D1, and an increase in 8542-A. The results provide no clear evidence that plages are heated by the dissipation of short-period waves.
Cram Lawrence E.
Woods Tod D.
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