Journal Article

Stress field and spin axis relaxation for inelastic triaxial ellipsoids

S. Breiter, A. Rożek and D. Vokrouhlický

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 427, issue 1, pages 755-769
Published in print November 2012 | ISSN: 0035-8711
Published online November 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.21970.x
Stress field and spin axis relaxation for inelastic triaxial ellipsoids

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A compact formula for the stress tensor inside a self-gravitating, triaxial ellipsoid in an arbitrary rotation state is given. It contains no singularity in the incompressible medium limit. The stress tensor and the quality factor model are used to derive a solution for the energy dissipation resulting in the damping (short-axis mode) or excitation (long axis) of wobbling. In the limit of an ellipsoid of revolution, we compare our solution with earlier ones and show that, with appropriate corrections, the differences in damping times estimates are much smaller than it has been claimed.

Keywords: methods: analytical; celestial mechanics; minor planets, asteroids: general

Journal Article.  9496 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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