Mathematics – Probability
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977stin...7724038g&link_type=abstract
Unknown
Mathematics
Probability
Interplanetary Dust, Interstellar Matter, Particle Mass, Poynting-Robertson Effect, Celestial Mechanics, Plasma Clouds, Radiation Pressure, Solar Gravitation
Scientific paper
The Poynting-Robertson effect acting on interstellar particles passing by the sun was shown to have the potential to capture and possibly to contribute some of these particles to the interplanetary dust complex. When the probability of encounter of the sun with interstellar clouds is considered, the quasi-equilibrium mass rate of accretion by this mechanism is comparable to the mass loss rate of the interplanetary complex. The mechanism then produces a quasi-equilibrium condition to maintain the interplanetary particle complex. This requires that the interstellar particles have a repulsive force due to radiation pressure less than the attractive gravitational force. If this assumption is correct for a significant fraction of the particles, then at intervals an interstellar cloud may pass sufficiently close to the sun to allow the Poynting-Robertson effect to replenish the interplanetary complex. The previously proposed mechanisms of gravitational encounters and the solar gravitational lens as a method of capture of interstellar particles are shown to be insufficient. Corrections to the formulations of these two methods are given, and a closed form formula of the Poynting-Robertson effect on hyperbolic orbits about a star is derived.
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