meter size barrier
(one meter barrier)
(a barrier to planet formation on the order of a meter diameter)
A meter size barrier or one meter barrier is a size-limiting
factor to the development of planets beyond the order of a meter
in size. Some consider this a category including multiple
types of barriers, since a number appear to bar growth beyond
sizes ranging from a centimeter to a few meters. Some of them:
- bouncing barrier - while specs of dust might stick together when they meet, after a certain size, they seem more likely to bounce off each other.
- radial drift barrier - the interaction of objects within a protoplanetary disk causes inward migration. At an optimum size for migration, which is on the order of a meter diameter, all would seem to migrate into the star.
- fragmentation barrier - collisions between the forming planets would be violent enough to break them apart.
kilometer size barrier