Influence of the interplanetary magnetic field on cometary and primordial dust orbits - Applications of Lorentz Scattering

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Interplanetary Dust, Interplanetary Magnetic Fields, Lorentz Force, Magnetic Effects, Orbit Perturbation, Orbital Elements, Comets, Graphite, Scattering, Solar Orbits, Solar System, Comets, Cosmic Dust, Orbits, Magnetic Fields, Scattering, Data, Size, Acceleration, Particles, Mathematical Models, Eccentricity, Solar Wind, Electrical Charge, Distribution, Composition, Characteristics, Interplanetary Magnetic Field

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The equations describing the change in orbital elements of interplanetary dust due to Lorentz-force accelerations are presented in a simplified form. Such accelerations depend on the charge state of the dust; results of theoretical calculations for five possible dust materials are presented. Under present-day conditions, it is possible that semiconducting material such as graphite might carry a net voltage near zero, compared with a roughly 10-V charge expected for other grains. The scattering of dust by a randomly changing magnetic field can be viewed analogously to the dust diffusing in space; the equations presented thus can be used to interpret observations of the present distribution of dust in terms of its possible sources and sinks. The stronger magnetic fields of the early solar system would have led to more vigorous scattering of the dust; particles as large as 1 mm could have been significantly transported by Lorentz scattering during this time.

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