Results 61 to 70 of about 11,561 (252)

Measurements of Dielectric Properties of Chang’E‐5 Lunar Samples

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract The Chang’E‐5 samples are the youngest lunar materials collected to date. Determining their dielectric properties is essential for understanding the physical characteristics of lunar regolith and refining its dielectric model. In this study, the real part of permittivity and the loss tangent of the Chang’E‐5 samples were systematically ...
Yuhang Liu, Yan Su, Ruigang Wang, Shun Dai, Dawei Liu, Bin Liu, Chunyu Ding, Jianjun Liu, Chunlai Li   +8 more
wiley   +1 more source

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS)

Astronomy & Astrophysics
Context. Dusty discs detected around main-sequence stars are thought to be signs of planetesimal belts in which the dust distribution is shaped by collisional and dynamical processes, including interactions with gas if present. The debris disc around the
Jankovic M. R., Pawellek N., Zander J., Löhne T., Krivov A. V., Olofsson J., Brennan A., Milli J., Bonduelle M., Wyatt M. C., Sefilian A. A., Pearce T. D., Mac Manamon S., Han Y., Marino S., Matrà L., Moór A., Booth M., Chiang E., Mansell E., Weber P., Hughes A. M., Wilner D. J., Luppe P., Zawadzki B., del Burgo C., Kóspál Á., Pérez S., Carpenter J. M., Henning T.   +29 more
doaj   +1 more source

A Lagrangian Model for Dust Evolution in Protoplanetary Disks: Formation of Wet and Dry Planetesimals at Different Stellar Masses

, 2018
We introduce a new Lagrangian smooth-particle method to model the growth and drift of pebbles in protoplanetary disks. The Lagrangian nature of the model makes it especially suited to follow characteristics of individual (groups of) particles, such as ...
Krijt, Sebastiaan, Ormel, Chris W., Schoonenberg, Djoeke   +2 more
core   +1 more source

Transience of hot dust around sun-like stars [PDF]

, 2006
There is currently debate over whether the dust content of planetary systems is stochastically regenerated or originates in planetesimal belts evolving in steady state.
C. A. Beichman, C. M. Lisse, Dohnanyi J., G. Bryden, J. S. Greaves, Krivov A. V., M. C. Wyatt, R. Smith   +7 more
core   +2 more sources

Dynamics and accretion of planetesimals [PDF]

Progress of Theoretical and Experimental Physics, 2012
We review the basic dynamics and accretion of planetesimals by showing N-body simulations. The orbits of planetesimals evolve through two-body gravitational relaxation: viscous stirring increases the random velocity and dynamical friction realizes the equiparation of the random energy.
Kokubo, Eiichiro, Ida, Shigeru
openaire   +2 more sources

Geochemical and petrographic re‐evaluation of ungrouped iron meteorites from Western Australia

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 444-465, March 2026.
Abstract Under the current classification scheme, ungrouped irons make up ~11% of all recognized iron meteorites. A further ~7% of iron meteorites are currently classified as simply “irons” and are yet to be fully classified. To potentially classify these meteorites, newer approaches, including either statistical modeling or advanced geochemical ...
Ashley Rogers, Lucy Forman, Kai Rankenburg, Rachel Kirby, Martin Danišík, Victoria Cousins, Gretchen K. Benedix   +6 more
wiley   +1 more source

Streaming Instability and Turbulence: Conditions for Planetesimal Formation

The Astrophysical Journal
The streaming instability (SI) is a leading candidate for planetesimal formation, which can concentrate solids through two-way aerodynamic interactions with the gas.
Jeonghoon Lim, Jacob B. Simon, Rixin Li, Philip J. Armitage, Daniel Carrera, Wladimir Lyra, David G. Rea, Chao-Chin Yang, Andrew N. Youdin   +8 more
doaj   +1 more source

Impact‐Generated Mixing, Melting and Vaporization of the Early Earth's Crust

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract Earth's primary accretion was followed by a protracted flux of interplanetary collisions by leftover planetesimals. The effects of the largest collisions—with bodies possibly exceeding 1,000 km diameter—would have been devastating for terrestrial near‐surface environments.
S. Marchi, A. M. Alexander, R. Citron, B. C. Johnson   +3 more
wiley   +1 more source

Formation of Multiple Dynamical Classes in the Kuiper Belt via Disk Dissipation

The Astrophysical Journal
Planetesimal formation likely lasted for millions of years in the solar nebula, and the cold classicals in the Kuiper Belt are suggested to be the direct products of streaming instability.
Tommy Chi Ho Lau, Til Birnstiel, Sebastian M. Stammler, Joanna Drążkowska   +3 more
doaj   +1 more source

On the dynamics and collisional growth of planetesimals in misaligned binary systems

, 2011
Context. Abridged. Many stars are members of binary systems. During early phases when the stars are surrounded by discs, the binary orbit and disc midplane may be mutually inclined.
Artymowicz, Benz, Ciecieläg, Desidera, Duquennoy, Eggenberger, Fragner, Ghez, Hale, Hayashi, Heppenheimer, Housen, Innanen, Kley, Kley, Kortenkamp, Kozai, Larwood, Leinert, Lubow, M. M. Fragner, Marzari, Marzari, Marzari, Ogilvie, Paardekooper, Paardekooper, Papaloizou, Papaloizou, Papaloizou, R. P. Nelson, Shakura, Stapelfeldt, Stewart, Terquem, Thebault, van Leer, W. Kley, Weidenschilling, Wetherill, Wu, Xie, Xie, Ziegler   +43 more
core   +1 more source