Are Pebble Pile Planetesimals Doomed? [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 In parabolic flight experiments we studied the wind induced erosion of granular beds composed of spherical glass beads at low gravity and low ambient pressure. Varying g-levels were set by centrifugal forces. Expanding existing parameter sets to a pressure range between $p=300-1200\,$Pa and to g-levels of $g=1.1-2.2\,\rm m\,s^{-2}$ erosion thresholds ...
Tunahan Demirci +6 more
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Chondrule formation by collisions of planetesimals containing volatiles triggered by Jupiter’s formation [PDF]
Scientific ReportsChondrules are spherical or subspherical particles of crystallized or partially crystallized liquid silicates that constitute large-volume fractions of most chondritic meteorites.
Sin-iti Sirono, Diego Turrini
doaj +2 more sources
Testing the Jeans, Toomre, and Bonnor–Ebert Concepts for Planetesimal Formation: 3D Streaming-instability Simulations of Diffusion-regulated Formation of Planetesimals [PDF]
Astrophysical Journal, 2021 We perform streaming-instability simulations at Hill density and beyond to demonstrate that planetesimal formation is not completed when pebble accumulations exceed the local Hill density.
Hubert Klahr, Andreas Schreiber
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Formation of dust-rich planetesimals from sublimated pebbles inside of the snow line [PDF]
, 2016 Content: For up to a few millions of years, pebbles must provide a quasi-steady inflow of solids from the outer parts of protoplanetary disks to their inner regions.
Guillot, Tristan, Ida, Shigeru
core +2 more sources
Formation of rocky super-earths from a narrow ring of planetesimals [PDF]
Nature Astronomy, 2023 A planetary origin model that forms exoplanets from a narrow ring of silicate material at a stellocentric distance of 1 au is able to explain the physical properties of super-Earths and reproduce the ‘peas in a pod’ pattern of uniformity within planetary
K. Batygin, A. Morbidelli
semanticscholar +1 more source
Isotopic trichotomy of main belt asteroids from implantation of outer solar system planetesimals [PDF]
Earth and Planetary Science Letters, 2023 Recent analyses of samples from asteroid (162173) Ryugu returned by JAXA's Hayabusa2 mission suggest that Ryugu and CI chondrites formed in the same region of the protoplanetary disk, in a reservoir that was isolated from the source regions of other ...
D. Nesvorný +4 more
semanticscholar +1 more source
Nucleosynthetic Pt isotope anomalies and the Hf-W chronology of core formation in inner and outer solar system planetesimals [PDF]
Earth and Planetary Science Letters, 2021 The Hf-W chronology of iron meteorites provides crucial information on the timescales of accretion and differentiation of some of the oldest planetesimals of the Solar System.
F. Spitzer +3 more
semanticscholar +1 more source
The Streaming Instability Cannot Form Planetesimals from Millimeter-size Grains in Pressure Bumps [PDF]
Astrophysical Journal Letters, 2022 We present evidence that it is unlikely that the streaming instability (SI) can form planetesimals from millimeter grains inside axisymmetric pressure bumps.
D. Carrera, J. Simon
semanticscholar +1 more source
Thermophysical evolution of planetesimals in the primordial disc [PDF]
Monthly notices of the Royal Astronomical Society, 2021 The primordial disc of small icy planetesimals, once located at 15–$30\, \mathrm{au}$ from the Sun, was disrupted by giant planet migration in the early Solar system.
B. Davidsson
semanticscholar +1 more source
From Pebbles and Planetesimals to Planets and Dust: The Protoplanetary Disk–Debris Disk Connection [PDF]
Astrophysical Journal, 2021 The similar orbital distances and detection rates of debris disks and the prominent rings observed in protoplanetary disks suggest a potential connection between these structures. We explore this connection with new calculations that follow the evolution
J. Najita, S. Kenyon, B. Bromley
semanticscholar +1 more source