Context. Nearly all contemporary theoretical research on cometary dust activity relies on
models depicting heat transfer and sublimation products within the near-surface porous …

We study the heat transfer in weakly interacting particle systems in vacuum. The particles
have surface roughness with self-affine fractal properties, as expected for mineral particles …

Compressive strength is a key to understanding the internal structure of dust aggregates in
protoplanetary disks and their resultant bodies, such as comets and asteroids in the solar …

Two major questions regarding comets have been up to now far from any solution.(i) How is
it possible that water-ice sublimation from the nucleus surface does not lead to an insulating …

Comets are believed to have amorphous rather than crystalline ice at the epoch of their
accretion. Cometary ice contains some impurities that govern the latent heat of ice …

Granular solids in planetary science are found in the regolith that covers planetary surfaces
as well as in the bulk of rubble-pile asteroids, comets and planetesimals. To help …

The thermal conductivity of granular planetary regolith is strongly dependent on the porosity,
or packing density, of the regolith particles. However, existing models for regolith thermal …

Written by a leading expert on comets, this textbook is divided into seven main elements with
a view to allowing advanced students to appreciate the interconnections between the …

The internal stress levels of the crushed rock masses will change the movement states of the
rock masses in the gob, and then affect the void distributions of crushed rock mass, and …

We perform a numerical simulation of compression of a highly porous dust aggregate of
monodisperse spheres. We find that the average interparticle normal force within the …