Results 131 to 140 of about 16,853 (286)
Comets and Planetesimal Formation
, 2022 In this chapter, we review the processes involved in the formation of planetesimals and comets. We will start with a description of the physics of dust grain growth and how this is mediated by gas-dust interactions in planet-forming disks. We will then delve into the various models of planetesimal formation, describing how these planetesimals form as ...
Simon, Jacob B. +3 more
openaire +2 more sources
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
Magma Ocean Evolution at Arbitrary Redox State
Journal of Geophysical Research: Planets, Volume 129, Issue 12, December 2024.Abstract Interactions between magma oceans and overlying atmospheres on young rocky planets leads to an evolving feedback of outgassing, greenhouse forcing, and mantle melt fraction. Previous studies have predominantly focused on the solidification of oxidized Earth‐similar planets, but the diversity in mean density and irradiation observed in the low ...
Harrison Nicholls +3 more
wiley +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
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Planetesimal Accretion in Binary Systems: Role of the Companion's Orbital Inclination
, 2009 Recent observations show that planet can reside in close binary systems with stellar separation of only about 20 AU. However, planet formation in such close binary systems is a challenge to current theory.
Armitage +23 more
core +1 more source
Implications of the interstellar object 1I/'Oumuamua for planetary dynamics and planetesimal formation [PDF]
, 2017 'Oumuamua, the first bona-fide interstellar planetesimal, was discovered passing through our Solar System on a hyperbolic orbit. This object was likely dynamically ejected from an extrasolar planetary system after a series of close encounters with gas ...
S. Raymond +4 more
semanticscholar +1 more source
Geostandards and Geoanalytical Research, Volume 48, Issue 4, Page 837-862, December 2024.Key points Methodological protocol for field‐based handheld LIBS for qualitative and quantitative analysis of iron meteorites. Good agreement was achieved between handheld LIBS measurement results and reference data for Fe, Ni, Co, and Cu. Handheld LIBS can achieve preliminary chemical identification and classification of iron meteorites including ...
Giorgio S. Senesi +6 more
wiley +1 more source
Planetesimal Disk Evolution Driven by Embryo-Planetesimal Gravitational Scattering
The Astronomical Journal, 2003 40 pages, 9 figures, submitted to ...
openaire +3 more sources
Did a Complex Carbon Cycle Operate in the Inner Solar System?
Life, 2020 Solids in the interstellar medium consist of an intimate mixture of silicate and carbonaceous grains. Because 99% of silicates in meteorites were reprocessed at high temperatures in the inner regions of the Solar Nebula, we propose that similar levels of
Joseph A. Nuth +3 more
doaj +1 more source
Meteoritics &Planetary Science, Volume 59, Issue 12, Page 3282-3304, December 2024.Abstract Understanding the material transport and mixing processes in the Solar protoplanetary disk provides important constraints on the origin of chemical and isotopic diversities of our planets. The limited extent of radial transport and mixing between the inner and outer Solar System has been suggested based on a fundamental isotopic dichotomy ...
Kohei Fukuda +7 more
wiley +1 more source