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Non-gravitational perturbations and evolution of the asteroid main belt

Published online by Cambridge University Press:  28 February 2005

David Vokrouhlický
Affiliation:
Institute of Astronomy, Charles University, Prague, V Holešovičkách 2, 18000 Prague 8, Czech Republic email: vokrouhl@mbox.cesnet.cz, mira@sirrah.troja.mff.cuni.cz
M. Brož
Affiliation:
Institute of Astronomy, Charles University, Prague, V Holešovičkách 2, 18000 Prague 8, Czech Republic email: vokrouhl@mbox.cesnet.cz, mira@sirrah.troja.mff.cuni.cz
W.F. Bottke
Affiliation:
Southwest Research Institute, 1050, Walnut St., Suite 400, Boulder, CO-80302, USA email: bottke@boulder.swri.edu, davidn@boulder.swri.edu
D. Nesvorný
Affiliation:
Southwest Research Institute, 1050, Walnut St., Suite 400, Boulder, CO-80302, USA email: bottke@boulder.swri.edu, davidn@boulder.swri.edu
A. Morbidelli
Affiliation:
Observatoire de Nice, Dept. Cassiopee, BP 4229, 06304 Nice Cedex 4, France email: morby@obs-nice.fr
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Abstract

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Gravity is the most important force to affect the motion of bodies in the Solar system. At small sizes, however, additional forces must be taken into account to explain fine details of their translational and rotational motion, as well as parameters of their populations. This is because the strength of the non-gravitational perturbations typically increases as $\simeq 1/D$ toward small sizes $D$. The principal perturbation acting on macroscopic main-belt bodies (sizes up to several kilometers for timescales of about billion years) is due to the anisotropic thermal re-radiation of the absorbed sunlight. In orbital dynamics this is known as the Yarkovsky effect, while in rotational dynamics the same physical phenomenon is called the YORP (Yarkovsky-O'Keefe-Radzievskii-Paddack) effect. We review the main observational implications of the Yarkovsky/YORP effects as understood and evidenced today.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Copyright
© 2005 International Astronomical Union