Results 81 to 90 of about 4,639 (216)

The Influence of Cold Jupiters in the Formation of Close-in Planets. I. Planetesimal Transport

The Astrophysical Journal, 2023
The formation of a cold Jupiter (CJ) is expected to quench the influx of pebbles and the migration of cores interior to its orbit, thus limiting the efficiency of rocky planet formation either by pebble accretion and/or orbital migration.
Marcy Best, Antranik A. Sefilian, Cristobal Petrovich   +2 more
doaj   +1 more source

Rheology and Structure of Fe‐Mg‐Ca Enriched Silicate Melt: Benchmarking Viscosity Models for an Exotic Planetary Composition

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Silicate melt viscosity plays a pivotal role in the evolution of rocky bodies within the Solar System, exerting first‐order control on mantle differentiation and stratification, while dictating the metal‐silicate separation and the subsequent volcanic activity.
Fabrizio Di Fiore, Michele Cassetta
wiley   +1 more source

Initial mass function of planetesimals formed by the streaming instability

, 2017
The streaming instability is a mechanism to concentrate solid particles into overdense filaments that undergo gravitational collapse and form planetesimals.
Yang, Chao Chin, Urs Schäfer, Chao-Chin Yang, Anders Johansen, Johansen, Anders, Schäfer, Urs, Schäfer, Urs,, Johansen, Anders,, Lund University.   +8 more
core   +2 more sources

Growth and thermal evolution of icy planetesimals

Earth, Planets and Space
Icy planetesimals are thought to contribute to the volatile inventory of terrestrial planets and serve as building blocks of icy bodies in the outer Solar System.
Jun Kimura, Ryusei Sato, Kentaro Terada, Sho Sasaki   +3 more
doaj   +1 more source

On the filtering and processing of dust by planetesimals 1. Derivation of collision probabilities for non-drifting planetesimals

, 2013
A&A, 572, A72 (2014). 31 pages, 29 figures. (Final version)International audienceContext. Circumstellar disks are known to contain a significant mass in dust ranging from micron to centimeter size.
Guillot, Tristan, Tristan Guillot, Ida, Shigeru, Chris W. Ormel, Ormel, Chris, W., Ormel, Chris,, Shigeru Ida, Ormel, Chris W.   +7 more
core   +1 more source

Thermal histories of El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155): Implications for the diversity of IAB‐ungrouped iron meteorites and their parent bodies

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1763-1787, August 2026.
Abstract This study provides the first petrographic, crystallographic, and chemical comparison between El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155), two particular IAB‐ungrouped iron meteorites. Both contain exceptionally large graphite nodules and “flowers”, providing unique insights into carbon behavior in metallic melts and cooling ...
L. Perez, M. Roskosz, F. Danoix, L. Kern, V. Megevand, C. Brillatz, B. Devouard, J. Gattacceca, M. Gounelle   +8 more
wiley   +1 more source

A Solution for the Density Dichotomy Problem of Kuiper Belt Objects with Multispecies Streaming Instability and Pebble Accretion

The Planetary Science Journal
Kuiper Belt objects (KBOs) show an unexpected trend, whereby large bodies have increasingly higher densities, up to five times greater than their smaller counterparts. Current explanations for this trend assume formation at constant composition, with the
Manuel H. Cañas, Wladimir Lyra, Daniel Carrera, Leonardo Krapp, Debanjan Sengupta, Jacob B. Simon, Orkan M. Umurhan, Chao-Chin Yang, Andrew N. Youdin   +8 more
doaj   +1 more source

The role of composition in the spectral evolution of carbonaceous asteroids as informed by Bennu sample return

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1875-1904, August 2026.
Abstract Near‐Earth rubble‐pile asteroids Bennu and Ryugu are part of the carbonaceous taxonomic complex (C‐complex), and samples returned from both bodies resemble the most aqueously altered carbonaceous chondrites. However, telescopic and spacecraft visible–near infrared (VIS–NIR) reflectance spectra of Ryugu exhibit a red (positive) spectral slope ...
Ralph E. Milliken, Takahiro Hiroi, Victoria E. Hamilton, Cody D. Schultz, Ed A. Cloutis, Hannah H. Kaplan, Melissa K. Kontogiannis, Nathalia Vega‐Santiago, Dani N. DellaGiustina, Harold C. Connolly Jr., Dante S. Lauretta   +10 more
wiley   +1 more source

Formation of planetesimals [PDF]

, 1991
Formation of planetesimals is discussed. The following subject areas are covered: (1) nebular structure; (2) aerodynamics of the solid bodies in the nebula; (3) problems with gravitational instability; (4) particle growth by coagulation; properties of ...
Weidenschilling, Stuart J.
core  

The Formation of Planetesimals

The Astrophysical Journal, 1973
Four stages in the accretion of planetesimals are described. The initial stage is the condensation of dust particles from the gaseous solar nebula as it cools. These dust particles settle into a thin disk which is gravitationally unstable. A first generation of planetesimals, whose radii range up to about 0.1 km, form from the dust disk by direct ...
Peter Goldreich, William R. Ward
openaire   +1 more source