Results 11 to 20 of about 4,544 (213)
Astronomy & Astrophysics, 2023 Planetesimals are born fragile and are subject to destruction by wind erosion as they move through the gas of a protoplanetary disk. In microgravity experiments, we determined the shear stress necessary for erosion of a surface consisting of 1 mm dust pebbles down to 1 Pa ambient pressure. This is directly applicable to protoplanetary disks.
L. Schönau +7 more
openaire +4 more sources
Pore Network Modeling of Core Forming Melts in Planetesimals
Frontiers in Earth Science, 2020 Early in the history of the solar system, planetesimals were differentiated into metallic cores. In some planetesimals, this differentiation took place by percolation of the denser core forming liquid through a lighter solid silicate matrix. A key factor
Saswata Hier-Majumder +1 more
exaly +3 more sources
Formation of Inner Planets in the Presence of a Cold Jupiter: Orbital Evolution and Relative Velocities of Planetesimals [PDF]
The Astrophysical Journal, 2023 We investigate the orbital evolution of planetesimals in the inner disk in the presence of nebula gas and a (proto-) cold Jupiter. By varying the mass, eccentricity, and semimajor axis of the planet, we study the dependence of the relative velocities of ...
Kangrou Guo, Eiichiro Kokubo
doaj +2 more sources
Episodic planetesimal disruptions triggered by dissipation of gas disk [PDF]
Nature CommunicationsCatastrophic disruptions of planetesimals occur in high-velocity collisions. Radioisotope dating of planetesimal disruption events recorded in meteorites confirms frequent catastrophic collisions in the first 10 Myr of the Solar System, reflecting a ...
Kang Shuai, Li-Yong Zhou, Hejiu Hui
doaj +2 more sources
Low strength and a shared size distribution connect the hot and cold Kuiper belt populations [PDF]
Nature CommunicationsUnderstanding how the observed size distribution of Kuiper Belt objects emerged from the primordial planetesimal population remains a major challenge in planetary science.
P. G. Benavidez +3 more
doaj +2 more sources
Recurrent planetesimal formation in an outer part of the early solar system [PDF]
Scientific ReportsThe formation of planets in our solar system encompassed various stages of accretion of planetesimals that formed in the protoplanetary disk within the first few million years at different distances to the sun.
Wladimir Neumann +3 more
doaj +2 more sources
, 2017 Processes governing the evolution of planetesimals are critical to understanding how rocky planets are formed, how water is delivered to them, the origin of planetary atmospheres, how cores and magnetic dynamos develop, and ultimately, which planets have the potential to be habitable.
core +3 more sources
Planet formation and disc dynamics in stellar clusters and misaligned binary systems [PDF]
, 2009 PhDIn this thesis I investigate the formation and dynamics of planets and protoplanetary discs, subject to external gravitational perturbations.
Fragner, Moritz Matthias
core +4 more sources
Ice Sublimation in Planetesimals Formed at the Outward Migrating Snowline
The Astrophysical Journal Letters, 2023 Isotopic studies of meteorites suggest that planetesimals were formed as two distinct populations: noncarbonaceous (NC) and carbonaceous (CC) reservoirs.
Zhongtian Zhang
doaj +1 more source
Planetesimal Growth in Evolving Protoplanetary Disks: Constraints from the Pebble Supply
The Astrophysical Journal, 2023 In the core accretion model, planetesimals grow by mutual collisions and engulfing millimeter-to-centimeter particles, i.e., pebbles. Pebble accretion can significantly increase the accretion efficiency and help explain the presence of planets on wide ...
Tong Fang +4 more
doaj +1 more source