57 citations · 278 across the 11 of their papers we have counts for
11 papers
The motion of chondrules and other particles in a protoplanetary disc with temperature fluctuations
Christoph Loesche, Gerhard Wurm, Thorben Kelling +2
We consider the mechanism of photophoretic transport in protoplanetary disks that are optically thick to radiation. Here, photophoresis is not caused by the central star but by tem…
Failed Growth at the Bouncing Barrier in Planetesimal Formation
Maximilian Kruss, Tunahan Demirci, Marc Koester +2
In laboratory experiments, we studied collisions of ensembles of compact (filling factor 0.33) millimeter dust aggregates composed of micrometer quartz grains. We used cylindrical…
An Insolation Activated Dust Layer on Mars
Caroline de Beule, Gerhard Wurm, Thorben Kelling +2
The illuminated dusty surface of Mars acts like a gas pump. It is driven by thermal creep at low pressure within the soil. In the top soil layer this gas flow has to be sustained b…
Experimental Study on Bouncing Barriers in Protoplanetary Disks
Thorben Kelling, Gerhard Wurm, Marc Köster
For dust aggregates in protoplanetary discs a transition between sticking and bouncing in individual collisions at mm to cm size has been observed in the past. This lead to the not…
Accretion through the inner edges of protoplanetary disks by a giant solid state pump
Thorben Kelling, Gerhard Wurm
At the inner edge of a protoplanetary disk solids are illuminated by stellar light. This illumination heats the solids and creates temperature gradients along their surfaces. Inter…
From Planetesimals to Dust: Low Gravity Experiments on Recycling Solids at the Inner Edge of Protoplanetary Disks
Caroline de Beule, Thorben Kelling, Gerhard Wurm +2
Transporting solids of different sizes is an essential process in the evolution of protoplanetary disks and planet formation. Large solids are supposed to drift inward; high-temper…
Crossing barriers in planetesimal formation: The growth of mm-dust aggregates with large constituent grains
Tim Jankowski, Gerhard Wurm, Thorben Kelling +4
Collisions of mm-size dust aggregates play a crucial role in the early phases of planet formation. We developed a laboratory setup to observe collisions of dust aggregates levitati…
Ice Particles Trapped by Temperature Gradients at mbar Pressure
Thorben Kelling, Gerhard Wurm, Christoph Dürmann
In laboratory experiments we observe that ice particles (\leq100 μm) entrained in a low pressure atmosphere (~1 mbar) get trapped by temperature gradients between three reservoirs…
A Mechanism to Produce the Small Dust Observed in Protoplanetary Disks
Thorben Kelling, Gerhard Wurm
Small (sub)-micron dust is present over the entire lifetime of protoplanetary disks. As aggregation readily depletes small particles, one explanation might be that dust is continuo…
Self-sustained Levitation of Dust Aggregate Ensembles by Temperature Gradient Induced Overpressures
Thorben Kelling, Gerhard Wurm
In laboratory experiments we observe dust aggregates from 100 μm to 1 cm in size composed of micrometer sized grains levitating over a hot surface. Depending on the dust sample agg…
Dust Ejection from Planetary Bodies by Temperature Gradients: Laboratory Experiments
Thorben Kelling, Gerhard Wurm, Miroslav Kocifaj +2
Laboratory experiments show that dusty bodies in a gaseous environment eject dust particles if they are illuminated. We find that even more intense dust eruptions occur when the li…