New insights into the variability of the cosmic ray diurnal anisotropy

Details New insights into the variability of the cosmic ray diurnal anisotropy New insights into the variability of the cosmic ray diurnal anisotropy

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.6653d&link_type=abstract

Journal of Geophysical Research, vol. 84, Nov. 1, 1979, p. 6653-6657.

Physics

4

Anisotropy, Cosmic Rays, Interplanetary Magnetic Fields, Twenty-Seven Day Variation, Diurnal Variations, Galactic Radiation, Harmonic Analysis, Histograms, Power Spectra, Solar Rotation, Solar Wind, Spectrum Analysis

Scientific paper

A study of the variation of the diurnal anisotropy has unambiguously confirmed the reality of a recurrence tendency that is related to the period of rotation of the sun. Data recorded at two equatorial viewing stations with essentially similar responses to the primary anisotropy (Swarthmore and Deep River) were analyzed by using three different techniques: power spectrum analysis, harmonic analysis, and superposed-epoch analysis. The following experimental results were obtained: (1) the variance of day-to-day changes in the diurnal anisotropy is greater for the component that is perpendicular to the interplanetary magnetic field than that which is parallel to it, and (2) the 27-day variation is maximum for the component of the diurnal anisotropy in the direction perpendicular to the interplanetary magnetic field. In contrast, there is no correlation between the sun's rotational period and the field-aligned component. Unlike the first result, the second, which was quite unexpected, cannot be accounted for by current theoretical models. This suggests that a new approach to this problem - probably including quasi-stationary corotating structure and particle drifts - is required.

Affiliated with

Also associated with

No associations

Rating

New insights into the variability of the cosmic ray diurnal anisotropy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with New insights into the variability of the cosmic ray diurnal anisotropy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New insights into the variability of the cosmic ray diurnal anisotropy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-975266