Results 81 to 90 of about 10,677 (209)
Ferromagmatic Intrusions on Asteroid (16) Psyche May Be Magnetized
Journal of Geophysical Research: Planets, Volume 130, Issue 8, August 2025.Abstract NASA's Psyche mission will arrive at the metal‐rich asteroid (16) Psyche in 2029. The mission will test whether (16) Psyche is a remnant of a melted, differentiated planetesimal that formed a molten iron metallic core. Previous studies have suggested that a molten metallic core fluid could erupt volcanically, explaining the high metal content ...
Samuel W. Courville +8 more
wiley +1 more source
Dust Coagulation Assisted by Streaming Instability in Protoplanetary Disks
The Astrophysical JournalThe streaming instability is a promising mechanism for planetesimal formation. The instability can rapidly form dense clumps that collapse self-gravitationally, which is efficient for large dust grains with Stokes number of the order of 0.1.
Ryosuke T. Tominaga, Hidekazu Tanaka
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
Overcoming migration during giant planet formation
, 2007 In the core accretion model, gas giant formation is a race between growth and migration; for a core to become a jovian planet, it must accrete its envelope before it spirals into the host star.
Edward W. Thommes +3 more
core +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
Streaming Instabilities in Accreting Protoplanetary Disks: A Parameter Study
The Astrophysical JournalThe streaming instability (SI) is currently the leading candidate for triggering planetesimal formation in protoplanetary disks. Recently, a novel variation, the “azimuthal-drift” streaming instability (AdSI), was discovered in disks exhibiting laminar ...
Shiang-Chih Wang, Min-Kai Lin
doaj +1 more source
Selective Aggregation Experiments on Planetesimal Formation and Mercury-Like Planets
Geosciences, 2018 Much of a planet’s composition could be determined right at the onset of formation. Laboratory experiments can constrain these early steps. This includes static tensile strength measurements or collisions carried out under Earth’s gravity and
Gerhard Wurm
doaj +1 more source
Fast Radio Bursts and Interstellar Objects
The Astrophysical JournalFast radio bursts (FRBs) are transient radio events with millisecond-scale durations and debated origins. Collisions between planetesimals and neutron stars (NSs) have been proposed as a mechanism to produce FRBs; the planetesimal strength, size, and ...
Dang Pham +4 more
doaj +1 more source
Impact of planet--planet scattering on the formation and survival of debris disks
, 2014 Planet--planet scattering is a major dynamical mechanism able to significantly alter the architecture of a planetary system. In addition to that, it may also affect the formation and retention of a debris disk by the system.
Marzari, F.
core +1 more source
Chondrule Survivability in the Solar Nebula
The Astrophysical JournalThe lifetime of millimeter-sized dust grains, such as chondrules, in the nominal solar nebula model is limited to ∼10 ^5 yr, due to an inward drift driven by gas drag.
Tetsuo Taki, Shigeru Wakita
doaj +1 more source