Journal Article

Times of inspiralling for interplanetary dust grains

J. Klačka and M. Kocifaj

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 390, issue 4, pages 1491-1495
Published in print November 2008 | ISSN: 0035-8711
Published online October 2008 | e-ISSN: 1365-2966 | DOI:
Times of inspiralling for interplanetary dust grains

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There are uncharged spherical dust particles interacting with solar electromagnetic radiation moving in the gravitational fields of the Sun and the Earth. The Earth is supposed to be moving in a circular orbit, and the effect of solar electromagnetic radiation is given by the Poynting–Robertson effect. The time of particle inspiralling toward the Sun is analysed for the pure Poynting–Robertson effect and in order to include the gravitational effect of the Earth. It is shown that the exterior mean-motion orbital resonances with the Earth may increase the time of spiralling into the Sun by 50 per cent, compared with the case of neglecting the gravitational effect of the Earth, for eccentricities smaller than 0.8. The result holds for particles from 1 μm to tens of μm in radii.

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

Journal Article.  2749 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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