In:
Annual Review of Earth and Planetary Sciences, Annual Reviews, Vol. 34, No. 1 ( 2006-05-01), p. 157-191
Kurzfassung:
The Yarkovsky and YORP (Yarkovsky-O'Keefe-Radzievskii-Paddack) effects are thermal radiation forces and torques that cause small objects to undergo semimajor axis drift and spin vector modifications, respectively, as a function of their spin, orbit, and material properties. These mechanisms help to (a) deliver asteroids (and meteoroids) with diameter D 〈 40 km from their source locations in the main belt to chaotic resonance zones capable of transporting this material to Earth-crossing orbits; (b) disperse asteroid families, with drifting bodies jumping or becoming trapped in mean-motion and secular resonances within the main belt; (c) modify the rotation rates and obliquities of D 〈 40 km asteroids; and (d) allow asteroids to enter into spin-orbit resonances, which affect the evolution of their spin vectors and feedback into the Yarkovsky-driven semimajor axis evolution. Accordingly, we suggest that nongravitational forces should now be considered as important as collisions and gravitational perturbations to our overall understanding of asteroid evolution.
Materialart:
Online-Ressource
ISSN:
0084-6597
,
1545-4495
DOI:
10.1146/earth.2006.34.issue-1
DOI:
10.1146/annurev.earth.34.031405.125154
Sprache:
Englisch
Verlag:
Annual Reviews
Publikationsdatum:
2006
ZDB Id:
124813-3
ZDB Id:
2010309-8
SSG:
16,13
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