Results 51 to 60 of about 14,221 (195)
The Phases of Water Ice in the Solar Nebula [PDF]
, 2014 Understanding the phases of water ice that were present in the solar nebula has implications for understanding cometary and planetary compositions as well as internal evolution of these bodies. Here we show that amorphous ice formed more readily than previously recognized, with formation at temperatures <70 K being possible under protoplanetary disk ...
arxiv +1 more source
The Astrophysical JournalWe present James Webb Space Telescope imaging from 2 to 21 μ m of the edge-on protoplanetary disk around the embedded young star IRAS04302+2247. The structure of the source shows two reflection nebulae separated by a dark lane.
Marion Villenave +8 more
doaj +1 more source
Material enhancement in protoplanetary nebulae by particle drift through evaporation fronts [PDF]
Astrophys.J. 614 (2004) 490-496, 2004 Solid material in a protoplanetary nebula is subject to vigorous redistribution processes relative to the nebula gas. Meter-sized particles drift rapidly inwards near the nebula midplane, and material evaporates when the particles cross a condensation/evaporation boundary. The material cannot be removed as fast in its vapor form as it is being supplied
arxiv +1 more source
Meteoritics &Planetary Science, Volume 60, Issue 3, Page 544-569, March 2025.Abstract Refractory inclusions (RIs) in chondrites are widely used as tracers of early solar system formation conditions. In the context of sample‐return missions, a non‐destructive and non‐invasive analytical tool that can rapidly detect and characterize RIs in space samples during their early phase of study is highly needed.
Jean Charlier +4 more
wiley +1 more source
Meteoritics &Planetary Science, Volume 60, Issue 2, Page 190-205, February 2025.Abstract The alignment of non‐spherical “flattened” chondrules into a petrofabric is a common feature of hydrated carbonaceous chondrite meteorites. This texture can form as a result of impacts at peak shock pressures exceeding 10 GPa. However, many carbonaceous chondrites with petrofabrics are unshocked.
Laura E. Jenkins +6 more
wiley +1 more source
Vertical shear instability in the solar nebula [PDF]
, 2016 We quantify the thermodynamic requirement for the Vertical Shear Instability and evaluate its relevance to realistic protoplanetary disks as a potential route to hydrodynamic turbulence.
arxiv +1 more source
Meteoritics &Planetary Science, Volume 60, Issue 2, Page 247-272, February 2025.Abstract Calcium‐aluminum‐rich inclusions (CAIs) are the first objects that formed in the solar accretion disk and therefore provide valuable insights into the evolution of the early solar system. A long‐standing question regarding this earliest formative period relates to the storage of CAIs in the 1–4 Myr time period between their formation and later
P. Ghaznavi +3 more
wiley +1 more source
Giant Planet Formation: A First Classification of Isothermal Protoplanetary Equilibria [PDF]
, 2005 We present a model for the equilibrium of solid planetary cores embedded in a gaseous nebula. From this model we are able to extract an idealized roadmap of all hydrostatic states of the isothermal protoplanets. The complete classification of the isothermal protoplanetary equilibria should improve the understanding of the general problem of giant ...
arxiv +1 more source
The cometary composition of a protoplanetary disk as revealed by complex cyanides [PDF]
Nature, 520, 7546, 198, 2015, 2015 Observations of comets and asteroids show that the Solar Nebula that spawned our planetary system was rich in water and organic molecules. Bombardment brought these organics to the young Earth's surface, seeding its early chemistry. Unlike asteroids, comets preserve a nearly pristine record of the Solar Nebula composition.
arxiv +1 more source
Zirconium isotope composition indicates s‐process depletion in samples returned from asteroid Ryugu
Meteoritics &Planetary Science, Volume 60, Issue 1, Page 3-16, January 2025.Abstract Nucleosynthetic isotope variations are powerful tracers to determine genetic relationships between meteorites and planetary bodies. They can help to link material collected by space missions to known meteorite groups. The Hayabusa 2 mission returned samples from the Cb‐type asteroid (162173) Ryugu.
Maria Schönbächler +89 more
wiley +1 more source