Results 61 to 70 of about 243,837 (300)

Examining Uranus’ ζ Ring in Voyager 2 Wide-angle Camera Observations: Quantifying the Ring’s Structure in 1986 and Its Modifications Prior to the Year 2007

The Planetary Science Journal, 2023
The ζ ring is the innermost component of the Uranian ring system. It is of scientific interest because its morphology changed significantly between the Voyager 2 encounter in 1986 and subsequent Earth-based observations around 2007.
M. M. Hedman, I. Regan, T. Becker, S. M. Brooks, I. de Pater, M. Showalter   +5 more
doaj   +1 more source

The Disk Substructures at High Angular Resolution Project (DSHARP). VI. Dust Trapping in Thin-ringed Protoplanetary Disks

, 2018
A large fraction of the protoplanetary disks observed with ALMA display multiple well-defined and nearly perfectly circular rings in the continuum, in many cases with substantial peak-to-valley contrast.
Andrews, Sean M., Bai, Xue-Ning, Benisty, Myriam, Birnstiel, Tilman, Carpenter, John M., Dullemond, Cornelis P., Guzmán, Viviana V., Huang, Jane, Isella, Andrea, Kurtovic, Nicolás T., Pérez, Laura M., Ricci, Luca, Wilner, David J., Zhang, Shangjia, Zhu, Zhaohuan   +14 more
core   +4 more sources

Physical models of streaming instabilities in protoplanetary discs [PDF]

, 2020
We develop simple, physically motivated models for drag-induced dust–gas streaming instabilities, which are thought to be crucial for clumping grains to form planetesimals in protoplanetary discs.
Hopkins, Philip F., Squire, Jonathan
core   +3 more sources

Thermoreflectance Detection of Point Defects Resulting from Focused Ion Beam Milling

Advanced Engineering Materials, EarlyView.
Focused ion beam (FIB) milling is a common tool for nanoscale material processing, however irradiation damage, redeposition, and contamination can occur. We use several characterization tools to show FIB‐induced effects beyond 1 mm from the milled area.
Thomas W. Pfeifer, Eric R. Hoglund, Anton V. Ievlev, Patrick E. Hopkins   +3 more
wiley   +1 more source

Laboratory Study of Dust Mobilization on Airless Planetary Bodies in the Solar Wind Plasma

The Planetary Science Journal
Dust charging, and the subsequent mobilization and transport, have been suggested to explain a number of unresolved and unusual features observed on airless planetary surfaces.
A. Cabra, X. Wang, M. Horányi
doaj   +1 more source

Dust growth in protoplanetary disks - a comprehensive experimental/theoretical approach

, 2010
More than a decade of dedicated experimental work on the collisional physics of protoplanetary dust has brought us to a point at which the growth of dust aggregates can - for the first time - be self-consistently and reliably modelled.
Dominik, Dullemond, Furlan, Güttler, Johansen, Jürgen Blum, Kessler-Silacci, Kothe, Langkowski, Natta, Poppe, Poppe, Schräpler, Stwart, Terquem, Wada, Wada, Wada, Weidenschilling, Weidenschilling, Weidling   +20 more
core   +1 more source

A generalisation of the Heckmann - Schucking cosmological solution [PDF]

, 2003
An exact solution of the Einstein equations for a Bianchi -I universe in the presence of dust, stiff matter and cosmological constant, generalising the well-known Heckmann-Schucking solution is presented.
A.Yu. Kamenshchik, Belinsky, Belinsky, Belinsky, Belinsky, Damour, Damour, Damour, Heckmann, I.M. Khalatnikov, Kasner, Khalatnikov, Khalatnikov, Khalatnikov, Landau, Linde, Misner, Nurowski, Perlmutter, Riess, Starobinsky   +20 more
core   +3 more sources

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Small but Notable Influence of Numerical Diffusion on Super Coarse Dust Sedimentation: Insights from UNO3 vs. Upwind Schemes

Atmosphere
Mineral dust plays a vital role in the Earth’s climate system, influencing radiation, cloud formation, biogeochemical cycles, and air quality. Accurately simulating dust transport in atmospheric models remains challenging, particularly for coarse and ...
Eleni Drakaki, Sotirios Mallios, Carlos Perez García-Pando, Petros Katsafados, Vassilis Amiridis   +4 more
doaj   +1 more source

Dust Evolution and the Formation of Planetesimals

, 2016
The solid content of circumstellar disks is inherited from the interstellar medium: dust particles of at most a micrometer in size. Protoplanetary disks are the environment where these dust grains need to grow at least 13 orders of magnitude in size. Our
Birnstiel, T., Fang, M., Johansen, A.
core   +1 more source