Disaggregation of Small, Cohesive Rubble Pile Asteroids due to YORP

Abstract

The implication of small amounts of cohesion within relatively small rubble pile asteroids is investigated with regard to their evolution under the persistent presence of the YORP effect. We find that below a characteristic size, which is a function of cohesive strength, density and other properties, rubble pile asteroids can enter a "disaggregation phase" in which they are subject to repeated fissions after which the formation of a stabilizing binary system is not possible. Once this threshold is passed rubble pile asteroids may be disaggregated into their constituent components within a finite time span. These constituent components will have their own spin limits -- albeit potentially at a much higher spin rate due to the greater strength of a monolithic body. The implications of this prediction are discussed and include modification of size distributions, prevalence of monolithic bodies among meteoroids and the lifetime of small rubble pile bodies in the solar system. The theory is then used to place constraints on the strength of binary asteroids characterized as a function of their type.

Accepted for publication in Icarus

References in corpus (11)

• Dynamics of rotationally fissioned asteroids: Source of observed small asteroid systems
• Formation of asteroid pairs by rotational fission
• Tidal Evolution of Rubble Piles
• Stress and Failure Analysis of Rapidly Rotating Asteroid (29075) 1950 DA
• Constraints on the Physical Properties of Main Belt Comet P/2013 R3 from its Breakup Event
• Coupled Spin and Shape Evolution of Small Rubble-Pile Asteroids: Self-Limitation of the YORP Effect
• Anatomy of an Asteroid Break-Up: The Case of P/2013 R3
• Matching asteroid population characteristics with a model constructed from the YORP-induced rotational fission hypothesis
• A New Large Super-Fast Rotator: (335433) 2005 UW163
• Equilibrium rotation states of doubly synchronous binary asteroids
• Constraints on Bounded Motion and Mutual Escape for the Full 3-Body Problem

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