Time variations in extreme-ultraviolet emission lines and the problem of coronal heating

Details Time variations in extreme-ultraviolet emission lines and the problem of coronal heating Time variations in extreme-ultraviolet emission lines and the problem of coronal heating

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199l.123v&link_type=abstract

Astrophysical Journal, vol. 199, July 15, 1975, pt. 2, p. L123-L126.

Astronomy and Astrophysics

Astrophysics

50

Far Ultraviolet Radiation, Line Spectra, Plasma Heating, Solar Corona, Solar Spectra, Time Dependence, Atmospheric Heating, Chromosphere, Emission Spectra, Luminous Intensity, Skylab Program, Ultraviolet Spectra

Scientific paper

We have analyzed the time structure of the intensity of solar chromospheric and coronal extreme-ultraviolet lines, obtained by the Harvard College Observatory spectrometer aboard Skylab. We find changes in the intensity of up to 50 percent in times as short as 1 minute, but not periodic oscillations. Some evidence is found for the presence of shock waves in the chromosphere and the transition region. It is suggested that the solar chromosphere and corona are heated by nonperiodic waves.

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