The insensitivity of the cosmic ray galactic anisotropy to heliomagnetic polarity reversals

Details The insensitivity of the cosmic ray galactic anisotropy to heliomagnetic polarity reversals The insensitivity of the cosmic ray galactic anisotropy to heliomagnetic polarity reversals

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33..395n&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, April 1985, p. 395-405. Research supported by the Australian Research Gra

Other

22

Anisotropy, Diurnal Variations, Galactic Cosmic Rays, Galactic Radiation, Polarity, Solar Magnetic Field, Magnetic Rigidity, Northern Sky, Southern Sky

Scientific paper

Using the cosmic ray sidereal and anti-sidereal diurnal variations observed underground in London and Hobart during the period 1958 - 1983, it is demonstrated that: (1) the phase changes of the apparent sidereal diurnal variation observed only in the Northern Hemisphere cannot be attributed to the change of the heliomagnetospheric modulation of galactic cosmic ray anisotropy caused by the polarity reversal of the solar magnetic field, but that they are due to the fluctuation of the spurious sidereal variation produced from the anisotropy responsible for the solar semi-diurnal variation; (2) the spurious sidereal variation can be eliminated from the apparent variation by using the observed anti-sidereal diurnal variation; and (3) after the elimination, the sidereal diurnal variations in the Northern and Southern Hemispheres almost coincide with each other and are stationary throughout the period, regardlesss of the polarity reversal of the heliomagnetosphere. The origin of the corrected sidereal variation is discussed.

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