Structure of the solar oscillation with period near 160 minutes

Details Structure of the solar oscillation with period near 160 minutes Structure of the solar oscillation with period near 160 minutes

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982stin...8225074s&link_type=abstract

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Computer Science

Periodic Variations, Solar Oscillations, Sun, Average, Doppler Effect, Fourier Analysis, Harmonic Oscillation, Least Squares Method, Magnetic Signatures, Solar Magnetic Field, Solar Velocity, Spectrum Analysis

Scientific paper

The solar oscillation with period near 160 minutes is found to be unique in a spectrum computed over the range of periods from about 71 to 278 minutes. A best estimate of the period is 160.0095 + or - 0.001 minutes, which is different from 160 minutes (one ninth of a day) by a highly significant amount. The width of the peak is approximately equal to the limiting resolution that can be obtained from an observation lasting 6 years, which suggests that the damping time of the oscillations is considerably longer than 6 years. A suggestion that this peak might be the result of a beating phenomenon between the five minute data averages and a solar oscillation with period near five minutes is shown to be incorrect by recomputing a portion of the spectrum using 15 second data averages.

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