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1. Radiation Pressure and Poynting-Robertson Drag for Small Spherical Particles

1977
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International Astronomical Union Colloquium
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A new heuristic derivation of the radiation pressure and Poynting-Robertson drag forces is presented for particles with general optical properties; previous derivations considered only perfectly absorbing materials. The equation of motion for a particle of mass m and geometrical cross-section A, moving with velocity v through a radiation field of energy flux F, is (to terms of order v/c)where r̂ is the radial unit vector, ṙ is the radial velocity, and c is the speed of light. The radiation

doi:10.1017/s0252921100070007
fatcat:o4nrdtlrijasxjjiepklldnqwa