Cosmic-ray Periodicity at 170 Days

Details Cosmic-ray Periodicity at 170 Days Cosmic-ray Periodicity at 170 Days

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999soph..185..397j&link_type=abstract

Solar Physics, v. 185, Issue 2, p. 397-403 (1999).

Physics

5

Scientific paper

Power-spectral analysis of cosmic-ray indices (CRI) data for the years 1989-1991 shows a 170-day periodicity of cosmic rays. The periodicity is related to a strong magnetic field. Power-spectral analysis of the long-term periodicity (~11years) of the CRI data for the years 1953-1997 shows that the period 1989-1991 is a unique one in the sense of the discussed pronounced periodicity. The 170-day periodicity of cosmic rays was interpreted in the base of six solar rotations (1SR = 28.3-day periodicity of 10.7 cm solar radio flux) and may be connected to the instability of the solar core.

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