Interplanetary dust particles near Jupiter

Details Interplanetary dust particles near Jupiter Interplanetary dust particles near Jupiter

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976icar...27..197s&link_type=abstract

Icarus, vol. 27, Feb. 1976, p. 197-205.

Computer Science

1

Interplanetary Dust, Jupiter (Planet), Micrometeoroids, Particle Density (Concentration), Particle Flux Density, Mass Spectra, Particle Size Distribution, Pioneer 10 Space Probe, Solar Orbits

Scientific paper

The expected counting rate of a flat micrometeoroid detector of finite sensitivity passing in hyperbolic orbit near a planet is calculated, assuming that the distribution of particle sizes can be expressed as a power-law spectrum of index p and also that the particles encounter the sphere of influence of the planet with a certain speed. The results of the calculations are then compared with the results returned by Pioneer 10 in its flyby of Jupiter. The observed increase in impact rate near Jupiter can be completely explained in terms of gravitational 'focusing' of particles which are in heliocentric orbits; i.e., they are not in orbit about Jupiter. The absolute concentration of particles near the orbit of Jupiter is of the same order as a 1 AU, the exact ratio being a function of particle speed and spectral index. Data from one flyby are insufficient to determine a unique value for both the spectral index and the particle velocity, but limits can be set.

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