Periodicities of hard x-ray burst during the last solar cycle

Mathematics – Logic

Scientific paper

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Fast Fourier Transformations, Periodic Variations, Solar Cycles, Solar Oscillations, Time Series Analysis, X Rays, Power Spectra, Spectrum Analysis, Solar Maximum Mission, Spectra, Spectrometers, Astronomical Spectroscopy

Scientific paper

By using power spectrum and standard FFT time series analysis, the Hard X-ray burst during solar cycle -22 were studied. This data of Hard X-ray burst spectrometer (HXRBS) on the solar maximum mission from Launch and February 14, 1980, through re-entry on December 2, 1989, by NASA artificial satellite. The results indicate that there are short and intermediate solar periodicities. Also it is found that there is a relation between the short periodicities (few minutes) with similar periodicities in solar radio emissions and in good agreement with the theoretical mode of solar oscillations.

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