Interplanetary flow systems associated with cosmic ray modulation in 1977-1980
Abstract
The hydromagnetic flow configurations associated with the cosmic ray modulation in 1977-1980 were determined using solar wind plasma and magnetic field data from Voyager 1 and 2 and Helios 1. The modulation was related to two types of large-scale systems of flows: one containing a number of transients such as shocks and postshock flows, the other consisting primarily of a series of quasistationary flows following interaction regions containing a stream interface and often bounded by a forward-reverse shock pair. Each of three major episodes of cosmic ray modulation was associated with the passage of a system of transient flows. Plateaus in the cosmic ray intensity-time profile were associated with the passage of systems of corotating streams.
- Publication:
-
Journal of Geophysical Research
- Pub Date:
- August 1984
- DOI:
- 10.1029/JA089iA08p06579
- Bibcode:
- 1984JGR....89.6579B
- Keywords:
-
- Galactic Cosmic Rays;
- Interplanetary Magnetic Fields;
- Magnetohydrodynamic Flow;
- Solar Cycles;
- Solar Wind;
- Energetic Particles;
- Helios 1;
- Modulation;
- Shock Waves;
- Voyager 1 Spacecraft;
- Voyager 2 Spacecraft