Journal Article

Analytical YORP torques model with an improved temperature distribution function

S. Breiter, D. Vokrouhlický and D. Nesvorný

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 401, issue 3, pages 1933-1949
Published in print January 2010 | ISSN: 0035-8711
Published online January 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.15781.x
Analytical YORP torques model with an improved temperature distribution function

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Previous models of the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect relied either on the zero thermal conductivity assumption, or on the solutions of the heat conduction equations assuming an infinite body size. We present the first YORP solution accounting for a finite size and non-radial direction of the surface normal vectors in the temperature distribution. The new thermal model implies the dependence of the YORP effect in rotation rate on asteroids conductivity. It is shown that the effect on small objects does not scale as the inverse square of diameter, but rather as the first power of the inverse.

Keywords: errata, addenda; radiation mechanisms: thermal; methods: analytical; celestial mechanics; minor planets, asteroids

Journal Article.  6802 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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