Results 51 to 60 of about 3,499 (221)

Planetesimal/Debris Disks

open access: yes, 2023
Review chapter of the book "Planetary Systems Now", to be published by World ...
openaire   +2 more sources

Widespread Impact‐Induced Crustal Permeability on the Early Earth

open access: yesAGU Advances, Volume 7, Issue 3, June 2026.
Abstract The early Earth (i.e., Archean and Hadean Eons, 2.5–4.0 and 4.0–4.5 Ga, respectively) experienced frequent cosmic bombardment. Impacts have been shown to stimulate crustal alteration, for instance via hydrothermal systems active for up to millions of years post‐impact.
A. M. Alexander   +2 more
wiley   +1 more source

Formation of pebble-pile planetesimals

open access: yes, 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,   +4 more
core   +1 more source

Delivery of icy planetesimals to inner planets in the Proxima Centauri planetary system

open access: yes, 2023
The estimates of the delivery of icy planetesimals from the feeding zone of Proxima Centauri c (with mass equal to 7mE, mE is the mass of the Earth) to inner planets b and d were made.
Ipatov, S. I.
core   +1 more source

Lunar Crustal Formation by Melt Migration and Differentiation Within a Stagnant Lid

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract The lunar anorthosite highlands represent the Moon's primary crust, which formed during the solidification of a magma ocean following the Moon‐forming giant impact. However, the canonical model of anorthite flotation in the crystallizing magma ocean often struggles to reproduce the long > ${ >} $200 Myr solidification timescale required by the
K. H. Dodds, C. Michaut, J. A. Neufeld
wiley   +1 more source

Rapid Dust Growth during Hydrodynamic Clumping due to Streaming Instability

open access: yesThe Astrophysical Journal, 2023
Streaming instability is considered to be one of the dominant processes in promoting planetesimal formation by the gravitational collapse of dust clumps.
Ryosuke T. Tominaga, Hidekazu Tanaka
doaj   +1 more source

The unexpected narrowness of eccentric debris rings: a sign of eccentricity during the protoplanetary disc phase [PDF]

open access: yesRoyal Society Open Science, 2020
This paper shows that the eccentric debris rings seen around the stars Fomalhaut and HD 202628 are narrower than expected in the standard eccentric planet perturbation scenario (sometimes referred to as ‘pericentre glow’). The standard scenario posits an
Grant M. Kennedy
doaj   +1 more source

APPLICATION OF GAS DYNAMICAL FRICTION FOR PLANETESIMALS. I. EVOLUTION OF SINGLE PLANETESIMALS [PDF]

open access: yesThe Astrophysical Journal, 2015
Accepted to ...
Evgeni Grishin, Hagai B. Perets
openaire   +2 more sources

An unsupervised machine learning approach to iron meteorite classification

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 6, Page 997-1011, June 2026.
Abstract Iron meteorites are usually classified manually using bivariate elemental plots. This study extends iron meteorite classification into multi‐element space. We present a computational method for the classification of iron meteorites by applying unsupervised machine learning using density‐based cluster analysis.
Louis‐Alexandre Lobanov, Hilary Downes
wiley   +1 more source

Distribution of Captured Planetesimals in Circumplanetary Gas Disks and Implications for Accretion of Regular Satellites [PDF]

open access: yes, 2017
Regular satellites of giant planets are formed by accretion of solid bodies in circumplanetary disks. Planetesimals that are moving on heliocentric orbits and are sufficiently large to be decoupled from the flow of the protoplanetary gas disk can be ...
Ohtsuki, Keiji, Suetsugu, Ryo
core   +1 more source

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