High-Resolution Simulations of Catastrophic Disruptions: Resultant Shape Distributions
arXiv:1911.08634 · doi:10.1016/j.pss.2019.104807
Abstract
The members of asteroid families have various shapes. We investigate the origin of their shapes by high-resolution impact simulations for catastrophic disruptions using a Smoothed Particle Hydrodynamics code. Collisional remnants produced through our simulations of the catastrophic disruptions mainly have spherical or bilobed shapes. However, no flat remnants with the ratio of minor to major axis lengths c/a < 0.5 are formed. The results of the simulations provide various shapes of asteroids and explain most of the shapes in asteroid families that are supposed to be produced through catastrophic disruptions. However, the present simulations do not explain significantly flat asteroids. We suggest that these flat asteroids may be interlopers or formed through low-velocity collisions between member asteroids.
arXiv comment16 pages, 8 figures, accepted for publication in Planetary and Space Science
References in corpus (12)
- Catastrophic disruptions revisited
- Direct N-body Simulations of Rubble Pile Collisions
- Constraining the cometary flux through the asteroid belt during the late heavy bombardment
- SPH calculations of asteroid disruptions: The role of pressure dependent failure models
- Volumes and bulk densities of forty asteroids from ADAM shape modeling
- New and updated convex shape models of asteroids based on optical data from a large collaboration network
- An ancient and a primordial collisional family as the main sources of X-type asteroids of the inner Main Belt
- From Planetesimals to Planets in Turbulent Protoplanetary Disks I. Onset of Runaway Growth
- The peculiar shapes of Saturn's small inner moons as evidence of mergers of similar-sized moonlets
- Distribution of spin-axes longitudes and shape elongations of main-belt asteroids
- Toward Understanding the Origin of Asteroid Geometries: Variety in Shapes Produced by Equal-Mass Impacts
- Collisional Elongation: Possible Origin of Extremely Elongated Shape of 1I/`Oumuamua