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

Published online by Cambridge University Press:  30 May 2022

Stanley F. Dermott Open the ORCID record for Stanley F. Dermott [Opens in a new window] ,
Dan Li  and
Apostolos A. Christou
Stanley F. Dermott
Affiliation:
Department of Astronomy, University of Florida, Gainesville, FL 32611, US email: [email protected]
Dan Li
Affiliation:
NSF’s National Optical-Infrared Astronomy Research Laboratory, Tucson, AZ 85719, US email: [email protected]
Apostolos A. Christou
Affiliation:
Armagh Observatory and Planetarium, College Hill, Armagh, BT61 9DG email: [email protected]
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Abstract

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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.

Keywords

asteroids
Type
Research Article
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S364: Multi-scale (Time and Mass) Dynamics of Space Objects (Oct 2021) , October 2019 , pp. 1 - 19
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of International Astronomical Union

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