Results 41 to 50 of about 15,247 (235)
Life, 2014 The asteroid (4) Vesta, parent body of the Howardite-Eucrite-Diogenite meteorites, is one of the first bodies that formed, mostly from volatile-depleted material, in the Solar System. The Dawn mission recently provided evidence that hydrated material was
Diego Turrini, Vladimir Svetsov
doaj +1 more source
Wind-shearing in gaseous protoplanetary disks and the evolution of binary planetesimals
, 2011 One of the first stages of planet formation is the growth of small planetesimals. This early stage occurs much before the dispersal of most of the gas from the protoplanetary disk. Due to their different aerodynamic properties, planetesimals of different
Andrews +15 more
core +1 more source
Stochasticity & Predictability in Terrestrial Planet Formation [PDF]
, 2016 Terrestrial planets are thought to be the result of a vast number of gravitational interactions and collisions between smaller bodies. We use numerical simulations to show that practically identical initial conditions result in a wide array of final ...
Grimm, Simon L. +3 more
core +2 more sources
Rapid Dust Growth during Hydrodynamic Clumping due to Streaming Instability
The 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
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Numerical simulations for terrestrial planets formation
EPJ Web of Conferences, 2011 We investigate the formation of terrestrial planets in the late stage of planetary formation using two-planet model. At that time, the protostar has formed for about 3 Myr and the gas disk has dissipated.
Ji J., Zhang N.
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
Geochemical and petrographic re‐evaluation of ungrouped iron meteorites from Western Australia
Meteoritics &Planetary Science, EarlyView.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 +6 more
wiley +1 more source
Fast accretion of small planetesimals by protoplanetary cores
, 2003 We explore the dynamics of small planetesimals coexisting with massive protoplanetary cores in a gaseous nebula. Gas drag strongly affects the motion of small bodies leading to the decay of their eccentricities and inclinations, which are excited by the ...
Greenberg J. M. +4 more
core +2 more sources
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 +3 more
wiley +1 more source
CONGLOMERATION OF KILOMETER-SIZED PLANETESIMALS [PDF]
The Astrophysical Journal, 2015 We study the efficiency of forming large bodies, starting from a sea of equal-sized planetesimals. This is likely one of the earlier steps of planet formation and relevant for the formation of the asteroid belt, the Kuiper belt and extra-solar debris disks.
Andrew Shannon +2 more
openaire +2 more sources