SP-345 Evolution of the Solar System

FIGURE 6.6.1.-Interaction of a large number of particles in Kepler orbits

 

FIGURE 6.6.1.-Interaction of a large number of particles in Kepler orbits (a). In the discussion of collision between particles in interplanetary space (e.g., evolution of the asteroidal belt or meteor streams) it is usually taken for granted that the state b will evolve into state a (positive diffusion). This is usually not correct. Collisions between the particles will not spread the orbits since the diffusion coefficient is negative (Baxter and Thompson, 1971, 1973). Instead, collisions will lead to equalization of the orbital elements, leading from state a to state b so that a jet stream is formed. (From Alfvén and Arrhenius, 1972.)

 
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