How to form asteroids from mm-sized grains
Abstract
The size distribution of asteroids in the solar system suggests that they formed top-down, with 100-1000 km bodies forming from the gravitational collapse of dense clumps of small solid particles. We investigate the conditions under which solid particles can form dense clumps in a protoplanetary disc. We used a hydrodynamic code to model the solid-gas interaction in disc. We found that particles down to millimeter size can form dense clumps, but only in regions where solids make 8% of the local surface density. More generally, we mapped the range of particle sizes and concentrations that is consistent with the formation of particle clumps.
Cite
@article{arxiv.1604.02186,
title = {How to form asteroids from mm-sized grains},
author = {Daniel Carrera and Anders Johansen and Melvyn B. Davies},
journal= {arXiv preprint arXiv:1604.02186},
year = {2016}
}
Comments
Proceedings of colloquium "Twenty years of giant exoplanets" held at Observatoire de Haute Provence, France, October 5-9, 2015. Edited by I. Boisse, O. Demangeon, F. Bouchy & L. Arnold, p. 105-108. Published by the Observatoire de Haute-Provence, Institut Pyth\'eas