6533b7d8fe1ef96bd126ac1b
RESEARCH PRODUCT
ANALYSIS OF SUNSPOT NUMBER FLUCTUATIONS
Huner FanchiottiC. A. Garcia CanalC. A. Garcia CanalS. J. SciuttoCarlos Hojvatsubject
SunspotSeries (mathematics)MeteorologyApplied MathematicsTime signalAstrophysicsSpectral lineFractalObservatoryModeling and SimulationDistortionDetrended fluctuation analysisGeometry and TopologyMathematicsdescription
Monthly averages of the sunspot number visible on the sun, observed from 1749, Zurich Observatory, and from 1848 other observatories, have been analyzed. This time signal presents a frequency power spectra with a clear 1/fα behavior with α≃0.8±0.2. The well-known cycle of approximately 11 years, clearly present in the spectrum, does not produce a sensible distortion of that behavior. The eventual characterization of the sunspot time series as a fractal is analyzed by means of the detrended fluctuation analysis (DFA). The jump-size distribution of the signal is also studied.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-12-01 | Fractals |