Differential measurement and model calculations of cosmic ray latitudinal gradient with respect to the heliospheric current sheet
Journal Article
·
· J. Geophys. Res.; (United States)
Simultaneous magnetic field and charged particle measurements from the Voyager spacecraft with heliographic latitude separations of >10/sup 0/ are used to investigate the distribution of approx.1-GeV galactic cosmic ray protons with respect to the heliospheric current sheet in the outer solar system. By comparing the ratio of cosmic ray flux at Voyager 1 to that at Voyager 2 during periods of relatively quiet interplanetary conditions when the spacecraft are either both north or both south of the heliospheric current sheet, we derive an average latitude component of the gradient of the cosmic ray flux on opposite sides of the current sheet under restricted interplanetary conditions of -0.22 +- 0.03%/deg, equivalent to a decrease of approx.1%/AU away from the current sheet at approx.12 AU. Our results for these limited periods are in qualitative agreement with propagation models incorporating particle drifts.
- Research Organization:
- California Institute of Technology, Pasadena
- OSTI ID:
- 5962080
- Journal Information:
- J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 91:A3; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
CALCULATION METHODS
COSMIC PROTONS
COSMIC RADIATION
COSMIC RAY FLUX
CURRENTS
DISTRIBUTION
ELECTRIC CURRENTS
ELEMENTARY PARTICLES
ENERGY LEVELS
FERMIONS
HADRONS
INTERPLANETARY MAGNETIC FIELDS
INTERPLANETARY SPACE
IONIZING RADIATIONS
MAGNETIC FIELDS
MATHEMATICAL MODELS
MODULATION
NUCLEONS
PROTONS
RADIATION FLUX
RADIATIONS
SOLAR CYCLE
SPACE
SPACE VEHICLES
VEHICLES
VOYAGER SPACE PROBES
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
CALCULATION METHODS
COSMIC PROTONS
COSMIC RADIATION
COSMIC RAY FLUX
CURRENTS
DISTRIBUTION
ELECTRIC CURRENTS
ELEMENTARY PARTICLES
ENERGY LEVELS
FERMIONS
HADRONS
INTERPLANETARY MAGNETIC FIELDS
INTERPLANETARY SPACE
IONIZING RADIATIONS
MAGNETIC FIELDS
MATHEMATICAL MODELS
MODULATION
NUCLEONS
PROTONS
RADIATION FLUX
RADIATIONS
SOLAR CYCLE
SPACE
SPACE VEHICLES
VEHICLES
VOYAGER SPACE PROBES