Astronomy and Astrophysics (ISSN 0004-6361), vol. 245, no. 1, May 1991, p. 199-202. CICYT-supported research.
Buitrago, J.; Mediavilla, E.; Portilla, M.
The orbital evolution of dust particles initially located outside the equatorial plane is considered. The averaging method is used to solve equations of motion. It is concluded that dust particles move in circular orbits perpendicular to the rotational axis and that the radius of these orbits depends on particle size and star luminosity.