Results 11 to 20 of about 21,167 (278)
Dynamics and Accretion of Planetesimals [PDF]
Progress of Theoretical and Experimental Physics, 2012 We review the basic dynamics and accretion of planetesimals by showing N-body simulations. The orbits of planetesimals evolve through two-body gravitational relaxation: viscous stirring increases the random velocity and dynamical friction realizes the ...
Ida, Shigeru, Kokubo, Eiichiro
core +2 more sources
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.
T. Demirci +6 more
semanticscholar +5 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
Early volatile depletion on planetesimals inferred from C–S systematics of iron meteorite parent bodies [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2021 Significance Habitable rocky worlds require a supply of essential volatile elements (C, H, N, and S). These are plentiful in early solar systems but depleted during processes leading to planet formation.
M. Hirschmann +4 more
semanticscholar +1 more source
Magma ascent in planetesimals: control by grain size [PDF]
Earth and Planetary Science Letters, 2018 Tim Lichtenberg +4 more
openalex +3 more sources
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
Collisional processes in extrasolar planetesimal discs - dust clumps in Fomalhaut's debris disc [PDF]
, 2002 This paper presents a model for the outcome of collisions between planetesimals in a debris disk and assesses the impact of collisional processes on the structure and size distribution of the disk. The model is presented by its application to Fomalhaut's
M. C. Wyatt, W. R. F. Dent
openalex +6 more sources
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 +1 more source