Three-dimensional structure of relativistic galactic cosmic ray anisotropies associated with solar rotation

Journal Article · Sat Mar 15 04:00:00 EST 1980 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/157827· OSTI ID:5364296

Owens, A J; Duggal, S P; Pomerantz, M A; Tolba, M F

Temporal power spectral analysis of data from a network of neutron monitors is used to determine the three-dimensional anisotropy vector associated with quasi-periodic 27 day solar rotational recurrences in the flux of relativistic (approx.10 GV) cosmic rays near Earth. From the diurnal anisotropy, we show that the recurrent flux in the ecliptic plane is perpendicular to the average interplanetary magnetic field direction. The observed north-south intensity difference indicates that there is a similar recurrent flux in the direction perpendicular to the ecliptic. The observations are accounted for by a simple th eoretical model in which the observed fluxes are attributed to particle gradient drifts arising from a symmetric cosmic-ray gradient about the average interplanetary magnetic field direction of approx.7% per AU.

• Research Organization: Bartol Research Foundation of the Franklin Institute, University of Delaware
• OSTI ID: 5364296
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 236:3; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
640107 -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
COSMIC RADIATION
ENERGY SPECTRA
INTERPLANETARY MAGNETIC FIELDS
IONIZING RADIATIONS
MAGNETIC FIELDS
MAIN SEQUENCE STARS
MOTION
RADIATIONS
ROTATION
SPECTRA
STARS
SUN