Planetesimals in rarefied gas: wind erosion in slip flow
Planetesimals in rarefied gas: wind erosion in slip flow
复制标题
稀薄气体中的星子:滑流中的风蚀
DOI:
10.1093/mnras/staa607
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发表时间:
2020
影响因子:
4.8
通讯作者:
G.Wurm
中科院分区:
文献类型:
--
作者:
T. Demirci;N. Schneider;T. Steinpilz;T. Bogdan;J. Teiser;G.Wurm
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 observe wind erosion in ground-based and microgravity experiments at pressures relevant in protoplanetary discs, i.e. down to. We find that the required shear stress for erosion depends on the Knudsen number related to the grains at the surface. The critical shear stress to initiate erosion increases as particles become comparable to or larger than the mean free path of the gas molecules. This makes pebble pile planetesimals more stable at lower pressure. However, it does not save them as the experiments also show that the critical shear stress to initiate erosion is very low for sub-millimetre-sized grains.
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DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
Mor Rozner;Evgeni Grishin;H. Perets
通讯作者:
H. Perets
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
A. Zalucha
通讯作者:
A. Zalucha
DOI:
10.3847/0004-637x/827/2/110
发表时间:
2016
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Kruss;T. Demirci;M. Koester;T. Kelling;G. Wurm
通讯作者:
G. Wurm
影响因子:
4.8
作者:
T. Demirci;M. Kruss;J. Teiser;T. Bogdan;F. Jungmann;N. Schneider;G. Wurm
通讯作者:
T. Demirci;M. Kruss;J. Teiser;T. Bogdan;F. Jungmann;N. Schneider;G. Wurm
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
G. Wurm;J. Blum;J. Colwell
通讯作者:
J. Colwell