Physics
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977soph...55..277c&link_type=abstract
Solar Physics, vol. 55, Dec. 1977, p. 277-285.
Physics
12
Carbon, Chromosphere, Plasma Oscillations, Power Spectra, Satellite Observation, Solar Spectra, Atomic Spectra, Ionic Waves, Light Scattering, Line Shape, Molecular Ions, Oso-8, Periodic Variations, Plasma Radiation, Plasma Spectra, Solar Atmosphere, Time Lag
Scientific paper
Satellite observations of velocity and intensity oscillations of the upper-chromospheric C II line at 1336 A were made. The dominant period of oscillation is 300 s, with little evidence of the power peak in the range 150-200 s which has been observed in other chromospheric lines. Peak-to-peak amplitudes are 2 km/s and 8% in velocity and intensity, respectively. Tentative evidence for a 900-s periodicity is presented. Relative phase measurements show that the maximum intensity for the 300-s oscillation leads the maximum blueshift by approximately 145 s. Comparison of line and background (scattered light) intensity variation shows upward wave propagation with time delays between the 1800-A continuum and the 1336-A C II variation of 27 s and 70 s for different cases.
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