The non-radial component of the solar wind and motion of dust near mean motion resonances with planets

Details The non-radial component of the solar wind and motion of dust near mean motion resonances with planets The non-radial component of the solar wind and motion of dust near mean motion resonances with planets

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...489..787k&link_type=abstract

Astronomy and Astrophysics, Volume 489, Issue 2, 2008, pp.787-793

Astronomy and Astrophysics

Astrophysics

2

Scattering, Celestial Mechanics, Interplanetary Medium, Solar Wind

Scientific paper

We investigate the effect of solar wind and solar electromagnetic radiation on the dynamics of spherical cosmic dust particles. We also consider the non-radial component of the solar wind velocity, in the reference frame of the Sun. We apply the equation of motion to the motion of dust grains near commensurability resonances with a planet - mean motion orbital resonance (MMR; a particle is in resonance with a planet when the ratio of their mean motions is approximately the ratio of two small integers) - and possible capture of the grains in the resonances. Up to now, only nonspherical grains, under action of the electromagnetic radiation of the central star, were known to exhibit an increase of semimajor axis before capture into the MMR. This paper shows that the same result can be generated by the non-radial component of the solar wind even for spherical dust particles. Spherical dust grains enable the treatment of the problem in an analytic way (at least partially), which is not the case for the effect of electromagnetic radiation on nonspherical dust grains. The situation treated in the paper presents the second known case when resonant trapping of a cosmic body occurs for diverging orbits. The paper presents the first case of secular evolution of the eccentricity of a body captured in the resonance derived in an analytic way for a body characterized by a diverging orbit.

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