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Nanoindenting the Chelyabinsk meteorite to learn about impact deflection effects in asteroids
Carles E. Moyano-Cambero, Eva Pellicer, Josep M. Trigo-Rodríguez +7
The Chelyabinsk meteorite is a highly shocked, low porosity, ordinary chondrite, probably similar to S- or Q-type asteroids. Therefore, nanoindentation experiments on this meteorit…
The role of pebble fragmentation in planetesimal formation II. Numerical simulations
Karl Wahlberg Jansson, Anders Johansen, Mohtashim Bukhari Syed +1
Some scenarios for planetesimal formation go through a phase of collapse of gravitationally bound clouds of mm-cm-sized pebbles. Such clouds can form for example through the stream…
The role of pebble fragmentation in planetesimal formation I. Experimental study
M. Bukhari Syed, J. Blum, K. Wahlberg Jansson +1
Previous work on protoplanetary dust growth shows halt at centimeter sizes owing to the occurrence of bouncing at velocities of 0.1 and fragmentation at velocities…
Spontaneous concentrations of solids through two-way drag forces between gas and sedimenting particles
Michiel Lambrechts, Anders Johansen, Holly L. Capelo +2
The behaviour of sedimenting particles depends on the dust-to-gas ratio of the fluid. Linear stability analysis shows that solids settling in the Epstein drag regime would remain h…
Why are Jupiter-family comets active and asteroids in cometary-like orbits inactive?
B. Gundlach, J. Blum
Context: Surveys in the visible and near-infrared spectral range have revealed the presence of low-albedo asteroids in cometary like orbits (ACOs). In contrast to Jupiter family co…