Is There a Temperature Limit in Planet Formation at 1000 K

摘要: Dust drifting inward in protoplanetary disks is subject to increasing temperatures. In laboratory experiments, we tempered basaltic dust between 873 K and 1273 find that the grains change size composition. These modifications influence outcome of self-consistent low speed aggregation experiments showing a transition temperature 1000 K. at lower temperatures grows maximum aggregate 2.02 ± 0.06 mm, which 1.49 0.08 times value for higher A similar ratio 1.75 0.16 results different set collision velocities. This agreement with orbit deduced observed extrasolar planets. Most terrestrial planets are positions equivalent less than on millimeter-scale elevated might therefore be key factor planet formation.