43 citations · 238 across the 12 of their papers we have counts for
10 papers · 1 filter
Forbidden planetesimals
Laurent Schönau, Jens Teiser, Tunahan Demirci +5
Planetesimals are born fragile and are subject to destruction by wind erosion as they move through the gas of a protoplanetary disk. In microgravity experiments, we determined the…
Destruction of eccentric planetesimals by ram pressure and erosion
Tunahan Demirci, Niclas Schneider, Jens Teiser +1
Small, pebble-sized objects and large bodies of planetesimal size both play important roles in planet formation. They form the evolutionary steps of dust growth in their own respec…
Accretion of eroding pebbles and planetesimals in planetary envelopes
Tunahan Demirci, Gerhard Wurm
Wind erosion is a destructive mechanism that completely dissolves a weakly bound object like a planetesimal into its constituent particles, if the velocity relative to the ambient…
Planetesimals in Rarefied Gas: Wind Erosion in Slip Flow
Tunahan Demirci, Niclas Schneider, Tobias Steinpilz +3
A planetesimal moves through the gas of its protoplanetary disc where it experiences a head wind. Though the ambient pressure is low, this wind can erode and ultimately destroy the…
Wind erosion on Mars and other small terrestrial planets
Maximilian Kruss, Grzegorz Musiolik, Tunahan Demirci +2
We carried out wind tunnel experiments on parabolic flights with 100 m Mojave Mars simulant sand. The experiments result in shear stress thresholds and erosion rates for varying…
Onset of planet formation in the warm inner disk -- Colliding dust aggregates at high temperatures
Tunahan Demirci, Corinna Krause, Jens Teiser +1
Collisional growth of dust occurs in all regions of protoplanetary disks with certain materials dominating between various condensation lines. The sticking properties of the preval…
Are Pebble Pile Planetesimals Doomed?
Tunahan Demirci, Maximilian Kruss, Jens Teiser +4
In parabolic flight experiments we studied the wind induced erosion of granular beds composed of spherical glass beads at low gravity and low ambient pressure. Varying g-levels wer…
Saltation under Martian Gravity and its Influence on the Global Dust Distribution
Grzegorz Musiolik, Maximilian Kruss, Tunahan Demirci +6
Dust and sand motion are a common sight on Mars. Understanding the interaction of atmosphere and Martian soil is fundamental to describe the planet's weather, climate and surface m…
Is There a Temperature Limit in Planet Formation at 1000 K?
Tunahan Demirci, Jens Teiser, Tobias Steinpilz +4
Dust drifting inward in protoplanetary disks is subject to increasing temperatures. In laboratory experiments, we tempered basaltic dust between 873 K and 1273 K and find that the…
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…