We use a newly developed cascade model of turbulent concentration of particles in
protoplanetary nebulae to calculate several properties of interest to the formation of primitive …

Context. The thermal conductivity of highly porous dust aggregates is a key parameter for
many subjects in planetary science; it is not yet fully understood, however. Aims. We …

Chondrules are often surrounded by fine-grained rims or igneous rims. The properties of
these rims reflect their formation histories. While the formation of fine-grained rims is …

Shock-wave heating within the solar nebula is one of the leading candidates for the source
of chondrule-forming events. Here we examine the possibility of compound chondrule …

Coarse objects in chondrites such as chondrules and CAIs are mostly coated with fine-
grained rims (FGRs). FGRs can be formed on the surface of free floating chondrules in a …

Fine-grained rims (FGRs) are frequently found around chondrules in primitive chondrites.
The remarkable feature of FGRs is their submicron-sized and nonporous nature. The typical …

Context. Collisions of dust aggregates are relevant for the evolution of protoplanetary disks.
Aims. While in the past interest focused on aggregates composed of monodisperse grains …

The major components of chondrites are chondrules and matrix. Measurements of volatile
abundance in Semarkona chondrules suggest that chondrules formed in a dense clump that …