Results 61 to 70 of about 4,544 (213)

Supervised Machine Learning Approach to Iron Meteorite Classification Using Random Forest: A Predictive Model to Classify Ungrouped Irons

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Iron meteorites provide insight into the formation processes of planetary cores from the early Solar System. Through further classifying individual irons into specific groups, which are assumed to represent a common parent body, greater information can be yielded into the formation processes of those bodies.
A. F. Rogers, L. Doucet, L. V. Forman, K. Rankenburg, G. K. Benedix   +4 more
wiley   +1 more source

Structural Evolution of Antigorite by High‐Velocity Impacts

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract Serpentine is a major hydrous mineral present in hydrous asteroids that have evolved through planetary impacts. Understanding its dynamic behavior is essential to elucidate the redistribution and retention of water during high‐velocity impact processes. The shock response of antigorite was examined at pressures up to 106 GPa using laser‐driven
Yuhei Umeda, Yusuke Seto, Naotaka Tomioka, Hiroshi Arima‐Osonoi, Yoichiro Hironaka, Yuichi Inubushi, Kento Katagiri, Ryosuke Kodama, Kohei Miyanishi, Hirotaka Nakamura, Norimasa Ozaki, Tomoko Sato, Keiichi Sueda, Tadashi Togashi, Toshinori Yabuuchi, Makina Yabashi, Toshimori Sekine, Takuo Okuchi   +17 more
wiley   +1 more source

Magnetic Field Evolution in Terrestrial Bodies from Planetesimals to Exoplanets

, 2019
Space missions have shown that most terrestrial bodies have an internally generated magnetic field in their metallic core and/or a crustal field due to remanent magnetism. The latter indicates the presence of an old dynamo at the time of crust formation.
Breuer, Doris
core   +1 more source

Pebbles versus planetesimals The outcomes of population synthesis models [PDF]

, 2020
In the core accretion scenario, a massive core forms first and then accretes an envelope. When discussing how this core forms some divergences appear.
Coleman, G. A. L., W. Benz, Y. Alibert, Alibert, Y., Jungo, N., Benz, W, Burn, R., Brugger, N, R. Burn, Burn, R, Alibert, Y, Coleman, GAL, Benz, W., N. Brügger, G. A. L. Coleman   +14 more
core   +3 more sources

Detailed Calculations of the Efficiency of Planetesimal Accretion in the Core-accretion Model. III. The Contribution of Planetesimals beyond Saturn

The Astrophysical Journal
Continuing our initiative on advancing the calculations of planetesimal accretion in the core-accretion model, we present here the results of our recent study of the contributions of planetesimals around and beyond the orbit of Saturn.
Nader Haghighipour, Morris Podolak, Esther Podolak   +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

Planetesimal Drift in Eccentric Disks: Possible Outward Migration

The Astrophysical Journal
Radial drift of solid particles in the protoplanetary disk is often invoked as a threat to planet formation, as it removes solid material from the disk before it can be assembled into planets.
Kedron Silsbee
doaj   +1 more source

Planetesimal Initial Mass Functions Following Diffusion-regulated Gravitational Collapse

The Astrophysical Journal, 2023
The initial mass function (IMF) of planetesimals is of key importance for understanding the initial stages of planet formation, yet theoretical predictions so far have been insufficient in explaining the variety of IMFs found in simulations.
Konstantin Gerbig, Rixin Li
doaj   +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

Formation of pebble-pile planetesimals

, 2014
Asteroids and Kuiper belt objects are remnant planetesimals from the epoch of planet formation. The first stage of planet formation is the accumulation of dust and ice grains into mm-cm-sized pebbles.
Johansen, Anders,, Wahlberg Jansson, Karl, Karl Wahlberg Jansson, Anders Johansen, Johansen, Anders   +4 more
core   +1 more source