Dynamical constraints on the evolution of the inner asteroid belt and the sources of meteorites

We have shown that in the inner belt the loss of asteroids from the ν6 secular resonance and the 3:1 Jovian mean motion resonance accounts for the observation that the mean size of the asteroids increases with increasing orbital inclination. We have used that observation to constrain the Yarkovsky l...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2021-10, Vol.15 (S364), p.1-19
Main Authors: Dermott, Stanley F., Li, Dan, Christou, Apostolos A.
Format: Article
Language:English
Subjects:
Asteroids
Astronomy
Belts
Frequency distribution
Orbital resonances (celestial mechanics)
Solar system
Vesta asteroid
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Summary:We have shown that in the inner belt the loss of asteroids from the ν6 secular resonance and the 3:1 Jovian mean motion resonance accounts for the observation that the mean size of the asteroids increases with increasing orbital inclination. We have used that observation to constrain the Yarkovsky loss timescale and to show that the family asteroids are embedded in a background population of old ghost families. We argue that all the asteroids in the inner belt originated from a small number of asteroids and that the initial mass of the belt was similar to that of the present belt. We also show that the observed size frequency distribution of the Vesta asteroid family was determined by the action of Yarkovsky forces, and that the age of this family is comparable to the age of the solar system.
ISSN:1743-9213
1743-9221
DOI:10.1017/S174392132100140X