Results 91 to 100 of about 16,853 (286)
Oligarchic Growth of Protoplanets in Planetesimal Rings
The Astrophysical JournalIn the standard planet formation scenario, planetesimals are assumed to form throughout the protoplanetary disk and to be smoothly distributed in the radial direction except for the snowline.
Yuki Kambara, Eiichiro Kokubo
doaj +1 more source
The missing large impact craters on Ceres
Nature Communications, 2016 Studying craters on atmosphere-less bodies can unlock information about planetesimal histories. Here, Marchi et al. present results from the NASA Dawn mission to Ceres showing that craters >100–150 km in size are largely absent, and find that Ceres ...
S. Marchi +14 more
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, 2010 We investigate the formation process of planetesimals from the dust layer by the gravitational instability in the gas disk using local $N$-body simulations. The gas is modeled as a background laminar flow.
Barge +29 more
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Ureilite meteorites provide a new model of early planetesimal formation and destruction
Geochemical Perspectives Letters, 2020 doi: 10.7185/geochemlet.2018 Ureilite meteorites are ultramafic rocks derived from parts of the depleted silicate mantle of their parent planetesimal.
N. Rai, H. Downes, C. Smith
semanticscholar +1 more source
Susceptibility of planetary atmospheres to mass loss and growth by planetesimal impacts: the impact shoreline [PDF]
Monthly notices of the Royal Astronomical Society, 2019 This paper considers how planetesimal impacts affect planetary atmospheres. Atmosphere evolution depends on the ratio of gain from volatiles to loss from atmosphere stripping fv; for constant bombardment, atmospheres with fv < 1 are destroyed in finite
M. Wyatt, Q. Kral, C. Sinclair
semanticscholar +1 more source
Magnesium phosphate in the Cold Bokkeveld (CM2) carbonaceous chondrite
Meteoritics &Planetary Science, EarlyView.Abstract Hydrous Mg‐phosphate was first described from astromaterials in particles returned from the C‐type asteroid Ryugu, and has subsequently been found in samples of the B‐type asteroid Bennu and CI1 carbonaceous chondrites. This phase may have been highly significant as a source of bioessential compounds for early Earth.
Martin R. Lee +2 more
wiley +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
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Dust-to-gas ratio resurgence in circumstellar disks due to the formation of giant planets: the case of HD 163296 [PDF]
, 2019 The amount of dust present in circumstellar disks is expected to steadily decrease with age due to the growth from micron-sized particles to planetesimals and planets. Mature circumstellar disks, however, can be observed to contain significant amounts of
Marzari, F. +3 more
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A gap in HD 92945’s broad planetesimal disc revealed by ALMA [PDF]
Monthly notices of the Royal Astronomical Society, 2019 In the last few years, multiwavelength observations have revealed the ubiquity of gaps/rings in circumstellar discs. Here we report the first ALMA observations of HD 92945 at 0.86 mm, which reveal a gap at about 73 ± 3 au within a broad disc of ...
S. Marino +7 more
semanticscholar +1 more source
Constraints on the Feasibility of Ferrovolcanism on Asteroid 16 Psyche
Journal of Geophysical Research: Planets, Volume 130, Issue 8, August 2025.Abstract Asteroid 16 Psyche's surface appears to be highly metallic, but its bulk density suggests a silicate‐rich interior. Ferrovolcanism has been suggested to explain how a silicate‐rich body could develop a metallic surface. This requires trapping of light elements bearing iron‐rich metallic melt in a core solidifying from the outside inwards.
J. J. Jorritsma, W. van Westrenen
wiley +1 more source