A time-dependent diffusion-convection model for the long-term modulation of cosmic rays

Details A time-dependent diffusion-convection model for the long-term modulation of cosmic rays A time-dependent diffusion-convection model for the long-term modulation of cosmic rays

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...197..495o&link_type=abstract

Astrophysical Journal, vol. 197, Apr. 15, 1975, pt. 1, p. 495-507.

Astronomy and Astrophysics

Astrophysics

13

Astronomical Models, Cosmic Rays, Interplanetary Medium, Particle Diffusion, Solar Wind Velocity, Time Dependence, Convective Flow, Diffusion Coefficient, Distribution Functions, Fokker-Planck Equation, Galactic Radiation, Solar Activity Effects, Solar Cycles, Time Lag

Scientific paper

The model considered incorporates, to first order, the direct effects of the time-dependent diffusive propagation of interstellar cosmic rays in a slowly changing interplanetary medium. A one-dimensional model is discussed along with a three-dimensional radial wind. An evaluation is conducted of average diffusive propagation times. It is found that the effects of time-dependent diffusive propagation can be quite significant. A rigidity-dependent time delay or 'lag' in the modulated spectra is predicted.

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