Effects of solar radiation on the orbits of small particles

Details Effects of solar radiation on the orbits of small particles Effects of solar radiation on the orbits of small particles

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..44..119l&link_type=abstract

Astrophysics and Space Science, vol. 44, Sept. 1976, p. 119-140.

Astronomy and Astrophysics

Astrophysics

5

Orbital Elements, Particle Trajectories, Plasma-Particle Interactions, Radiation Effects, Solar Radiation, Solar Wind, Circular Orbits, Eccentricity, Elliptical Orbits, Equations Of Motion, Particle Motion

Scientific paper

A modification of the Robertson (1937) equations of particle motion in the presence of solar radiation is developed which allows for partial reflection of sunlight as a result of rapid and varying particle rotations caused by interaction with the solar wind. The coefficients and forces in earlier forms of the equations are compared with those in the present equations, and secular rates of change of particle orbital elements are determined. Orbital dimensions are calculated in terms of time, probable sizes and densities of meteoric and cometary particles are estimated, and times of infall to the sun are computed for a particle moving in an almost circular orbit and a particle moving in an elliptical orbit of high eccentricity. Changes in orbital elements are also determined for particles from a long-period sun-grazing comet. The results show that the time of infall to the sun from a highly eccentric orbit is substantially shorter than from a circular orbit with a radius equal to the mean distance in the eccentric orbit. The possibility is considered that the free orbital kinetic energy of particles drawn into the sun may be the energy source for the solar corona.

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