Results 51 to 60 of about 15,247 (235)
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.Abstract The study of silicate glasses is important to understand the physical and chemical properties of silicate melts under high‐pressure conditions relevant to planetary interiors. We conducted in situ Brillouin spectroscopy measurements on two endmember, low‐impurity CaSiO3 glasses and one Fe, Al, Mg, Ti‐bearing CaSiO3 glass up to 23 GPa.
Wenhao Su +5 more
wiley +1 more source
On the Early Thermal Processing of Planetesimals during and after the Giant Planet Instability
The Planetary Science JournalBorn as ice-rich planetesimals, cometary nuclei were gravitationally scattered onto their current orbits in the Kuiper Belt and the Oort Cloud during the giant planets’ dynamical instability in the early stages of our solar system’s history.
Anastasios Gkotsinas +4 more
doaj +1 more source
The Influence of Cold Jupiters in the Formation of Close-in Planets. I. Planetesimal Transport
The Astrophysical Journal, 2023 The formation of a cold Jupiter (CJ) is expected to quench the influx of pebbles and the migration of cores interior to its orbit, thus limiting the efficiency of rocky planet formation either by pebble accretion and/or orbital migration.
Marcy Best +2 more
doaj +1 more source
Small Planetesimals in a Massive Disk Formed Mars
, 2013 Mars is likely to be a planetary embryo formed through collisions with planetesimals, which can explain its small mass and rapid formation timescale obtained from 182Hf-182$W chronometry. In the classical theory of planet formation, the final embryo mass
Dauphas, Nicolas, Kobayashi, Hiroshi
core +1 more source
Feasibility of transit photometry of nearby debris discs [PDF]
, 2014 Dust in debris discs is constantly replenished by collisions between larger objects. In this paper, we investigate a method to detect these collisions.
Kalas, P. +2 more
core +3 more sources
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.Abstract Silicate melts play a crucial role in planetary differentiation. The density contrast between silicate melts and the surrounding solid residue exerts a primary control on many magmatic processes. However, direct measurements of the density of silicate melts at high pressure (P) and temperature (T) conditions remain challenging, particularly ...
Man Xu +6 more
wiley +1 more source
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
openaire +3 more sources
Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.Abstract Primitive asteroids and carbonaceous chondrites (CCs) record the history of processes in the early solar system. Visible and shortwave infrared (VSWIR) spectroscopy of primitive asteroids and bulk‐powdered CCs has identified shared spectral features suggestive of shared parent body origins.
S. A. Parra +2 more
wiley +1 more source
Pebble formation by ice condensation
EPJ Web of Conferences, 2013 Pebbles with sizes of centimeters to decimeters are needed in order to form kilometer-sized planetesimals, which in turn are needed for planet formation to proceed. The well-studied mechanism of coagulation is efficient only up to millimeter-sized dust
Ros Katrin
doaj +1 more source
Vega's hot dust from icy planetesimals scattered inward by an outward-migrating planetary system
, 2014 Vega has been shown to host multiple dust populations, including both hot exo-zodiacal dust at sub-AU radii and a cold debris disk extending beyond 100 AU.
Bonsor, Amy, Raymond, Sean N.
core +3 more sources