Solar particle propagation from 1 to 5 AU

Details Solar particle propagation from 1 to 5 AU Solar particle propagation from 1 to 5 AU

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977soph...54..457z&link_type=abstract

Solar Physics, vol. 54, Oct. 1977, p. 457-504.

Computer Science

Numerical Analysis

34

Interplanetary Space, Particle Diffusion, Solar Cosmic Rays, Statistical Analysis, Data Reduction, Diffusion Coefficient, Mathematical Models, Numerical Analysis, Particle Acceleration, Pioneer 10 Space Probe, Pioneer 11 Space Probe, Radiation Counters, Transport Theory

Scientific paper

The radial variation of the interplanetary propagation of solar cosmic rays is investigated on a grand scale by performing a statistical analysis of charged-particle data obtained by Pioneers 10 and 11 from launch to Jovian encounter (i.e., at distances of 1 to 5 AU). A numerical propagation model is adopted which includes diffusion, convection, and adiabatic deceleration, as well as a variable power-law diffusion coefficient. The study of solar particle events is carried out by analyzing individually each of five key parameters that are uniquely defined in each solar particle event: the time to maximum flux starting from the initial release at the sun, the anisotropy at the time to maximum flux, the flux at that time, the time width of the event at half the flux at the time to maximum, and the decay time. Combined results for the proton energy ranges from 3.4 to 5.2 MeV and 24 to 30 MeV are presented, the average radial diffusion coefficients between 1 and 5 AU are determined for each energy range, and it is found that the combination of a near-impusive injection with a temporally constant spectral index produces a reasonably good fit to the high-energy data but not as good a fit to the low-energy data. Implications of the results obtained are discussed for cosmic-ray propagation theory, solar modulation studies, and interplanetary acceleration of solar particles.

Affiliated with

Also associated with

No associations

Rating

Solar particle propagation from 1 to 5 AU 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 Solar particle propagation from 1 to 5 AU, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar particle propagation from 1 to 5 AU will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-747506