Evidence of long-period solar velocity fluctuations

Details Evidence of long-period solar velocity fluctuations Evidence of long-period solar velocity fluctuations

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228l.119k&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 228, Mar. 15, 1979, p. L119-L122.

Astronomy and Astrophysics

Astrophysics

6

Solar Cycles, Solar Oscillations, Solar Spectrometers, Solar Velocity, Sunspots, Fourier Analysis, Periodic Variations, Power Spectra, Solar Rotation, Velocity Distribution

Scientific paper

Evidence of a solar fluctuation with a period of 17 days is observed in spectroscopic differential-rotation data by using a technique developed to look at long time sequences of unevenly spaced data. Both spectroscopic observations and sunspot drift-velocity measurements indicate a possible periodicity between 184 and 364 days. The sunspot data marginally show fluctuations with periods which are multiples of 4.2 days.

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