Compact YORP formulation and stability analysis

We present a concise analytical formulation of the YORP effect, with exact formulae for torques on convex bodies and motion-averaged components applicable to any shapes. We analyze the main features of the secular torques for zero and nonzero thermal inertia that are function series dependent on onl...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2013-10, Vol.558, p.np-np
Main Authors: Kaasalainen, Mikko, Nortunen, Hari
Format: Article
Language:English
Subjects:
asteroids: general
asteroids: individual: Apollo
asteroids: individual: Eger
Astronomy
Astrophysics
Estimates
Inertia
Mathematical analysis
Mathematical models
methods: analytical
methods: numerical
minor planets
Perturbation methods
radiation mechanisms: thermal
Stability
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Summary:We present a concise analytical formulation of the YORP effect, with exact formulae for torques on convex bodies and motion-averaged components applicable to any shapes. We analyze the main features of the secular torques for zero and nonzero thermal inertia that are function series dependent on only a few coefficients. Using these, we investigate the stability of the YORP effect against shape perturbations with analytical and numerical estimates. We define a quantity describing the YORP capacity of any shape, and estimate YORP stability with it.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/201322221