Power Spectra of Cosmic Ray Intensity for Years of Solar Activity Minimum And Maximum

Details Power Spectra of Cosmic Ray Intensity for Years of Solar Activity Minimum And Maximum Power Spectra of Cosmic Ray Intensity for Years of Solar Activity Minimum And Maximum

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....9.3877e&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

3

Scientific paper

The cosmic ray power spectra in the lowfrequency range (2.3 x 10-8 Hz to 5.8 x 10-6 Hz; periodicities from 2 to 500 days) during the epoch 19641995 was carried out over a wide range of particle rigidities. Our spectral analysis for the periods of solar activity maximum and minimum displayed different behaviors. The spectral density of cosmic rays showed peaks of varying amplitude with the solar rotation period and its harmonics due to the different mean rigidity response. Spectral power is high for solar activity cycles 20th and 22nd. Also, the first three harmonics of the solar rotation period (27-, 13.5and 9-days) are well defined for even cycles. There is higher power density during qA<0 epoch than during qA>0 epoch.

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