Modulation of cosmic ray intensity underground associated with the planet Jupiter

Details Modulation of cosmic ray intensity underground associated with the planet Jupiter Modulation of cosmic ray intensity underground associated with the planet Jupiter

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974pasau...2..293j&link_type=abstract

(Astronomical Society of Australia, Annual General Meeting, 8th, Hobart, Australia, May 22-24, 1974.) Astronomical Society of Au

Astronomy and Astrophysics

Astronomy

Cosmic Rays, Diurnal Variations, Jupiter (Planet), Mesons, Amplitude Modulation, Particle Flux Density, Periodic Variations, Planetary Orbits, Radiation Detectors

Scientific paper

Underground meson data are analyzed in Jovian time for any evidence of an effect at the higher energies over a complete orbital period. A minimum in meson intensity occurs daily when Jupiter transits the meridian. Two interpretations of this finding are given: (1) Jupiter causes the depression when it crosses the viewing cone of an underground detector; (2) a 12-year sinusoidal variation in amplitude of the sidereal diurnal intensity cycle produces a sideband component in Jovian time and a matching component in anti-Jovian time. Two features favor the first interpretation: (1) variation in annual mean right ascension and declination of Jupiter over the orbital period 1958-69 could result in amplitude modulation of the sidereal diurnal variation; (2) reexamination of the observed daily variation in intensity while disregarding harmonic analysis (upon which the second interpretation is based) shows a similarity between the sidereal daily variations as averaged over 1959-61 and 1965-67 except for a superimposed depression of intensity during 1959-61 centered on 1800 LST.

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