Zobrazeno 1 - 10
of 12
pro vyhledávání: '"DEMİRCİ, Tunahan"'
Autor:
Schönau, Laurent, Teiser, Jens, Demirci, Tunahan, Joeris, Kolja, Bila, Tetyana, Onyeagusi, F. Chioma, Fritscher, Miriam, Wurm, Gerhard
Publikováno v:
A6A 672, A169 (2023)
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 shear stress necessary for erosion of a surface consisting of 1 mm dus
Externí odkaz:
http://arxiv.org/abs/2305.03562
Autor:
Schneider, Niclas, Musiolik, Grzegorz, Kollmer, Jonathan E., Steinpilz, Tobias, Kruss, Maximilian, Jungmann, Felix, Demirci, Tunahan, Teiser, Jens, Wurm, Gerhard
In protoplanetary disks, zones of dense particle configuration promote planet formation. Solid particles in dense clouds alter their motion through collective effects and back reaction to the gas. The effect of particle-gas feedback with ambient soli
Externí odkaz:
http://arxiv.org/abs/2103.03609
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 respect. However, at later times, they are also thought to provide backgroun
Externí odkaz:
http://arxiv.org/abs/2010.14368
Autor:
Demirci, Tunahan, Wurm, Gerhard
Publikováno v:
A&A 641, A99 (2020)
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 gas and the local gas pressure are sufficiently high. In numerical sim
Externí odkaz:
http://arxiv.org/abs/2007.12074
Autor:
Demirci, Tunahan, Schneider, Niclas, Steinpilz, Tobias, Bogdan, Tabea, Teiser, Jens, Wurm, Gerhard
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 planetesimal if the flow is strong enough. For the first time, we obs
Externí odkaz:
http://arxiv.org/abs/2003.09237
Autor:
Steinpilz, Tobias, Musiolik, Grzegorz, Kruss, Maximilian, Jungmann, Felix, Demirci, Tunahan, Aderholz, Manfred, Kollmer, Jonathan E., Teiser, Jens, Bila, Tetyana, Guay, Evelyn, Wurm, Gerhard
Publikováno v:
Review of Scientific Instruments, 90:10 (2019)
We developed an experiment to study different aspects of granular matter under microgravity. The 1.5U small experiment was carried out on the International Space Station. About 3500 almost identical spherical glass particles with 856 um diameter were
Externí odkaz:
http://arxiv.org/abs/1911.05429
Publikováno v:
Icarus 337 (2020), 113438
We carried out wind tunnel experiments on parabolic flights with 100 $\mu$m Mojave Mars simulant sand. The experiments result in shear stress thresholds and erosion rates for varying g-levels at 600 Pa pressure. Our data confirm former results on JSC
Externí odkaz:
http://arxiv.org/abs/1911.01692
Publikováno v:
Astronomy & Astrophysics, 629, A66 (2019)
Collisional growth of dust occurs in all regions of protoplanetary disks with certain materials dominating between various condensation lines. The sticking properties of the prevalent dust species depend on the specific temperatures. The inner disk i
Externí odkaz:
http://arxiv.org/abs/1908.11657
Autor:
Demirci, Tunahan, Kruss, Maximilian, Teiser, Jens, Bogdan, Tabea, Jungmann, Felix, Schneider, Niclas, Wurm, Gerhard
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 484, 2779 (2019)
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 were set by centrifugal forces. Expanding existing parameter sets to a pr
Externí odkaz:
http://arxiv.org/abs/1901.07919
Autor:
Musiolik, Grzegorz, Kruss, Maximilian, Demirci, Tunahan, Schrinski, Björn, Teiser, Jens, Daerden, Frank, Smith, Michael D., Neary, Lori, Wurm, Gerhard
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 morphology. We set up a wind tunnel to study the lift of a mixture betw
Externí odkaz:
http://arxiv.org/abs/1801.08787