Journal Article

On some microphysical properties of dust grains captured into resonances with Neptune

M. Kocifaj and F. Kundracik

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 422, issue 2, pages 1665-1673
Published in print May 2012 | ISSN: 0035-8711
Published online April 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.20745.x
On some microphysical properties of dust grains captured into resonances with Neptune

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The trapping of dust grains in resonances with the planet Neptune can be affected by electromagnetic radiation. The interaction of solar radiation with a non-spherical particle depends on its size, shape, chemistry and orientation relative to the incident sunbeam. It has been shown earlier that the probability of resonant capture is increased if the transversal components of radiation pressure are close to 1 × 10−4. It is shown that some microphysical properties of dust particles captured in a mean-motion resonance with Neptune can be deduced based on the peak values of the radiation pressure components. In particular, it is demonstrated that chances for resonant capture are generally low for particles with sizes smaller than 4 μ m. This is due to increased optical sensitivity of these particles to the dominant wavelengths in the solar spectrum. The probability of resonant trapping also decreases when the refractive index of the particles decreases.

Keywords: scattering; methods: numerical; celestial mechanics; interplanetary medium; meteorites, meteors, meteoroids

Journal Article.  3560 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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