Results 31 to 40 of about 5,625,011 (180)
Thermal history, collisional history, and structure of the CK‐chondrite parent body
Meteoritics &Planetary Science, EarlyView.Abstract Major chondrite groups (H, L, LL, R, EH, EL, CK) with some members of petrologic type 5 and 6 also have some members of types 3 and 4; they do not have members of type 1 or 2. Their parent bodies had onion‐shell structures and were internally heated by the decay of 26Al.
Alan E. Rubin
wiley +1 more source
Laboratory Astrophysics of Dust
, 2011 Infrared spectroscopy is the best astronomical tool for studying the composition of cosmic dust. Thanks to the Herschel satellite, dust properties from the FIR to mm wavelength range will be sampled in different astrophysical environments.
C. Jäger, T. Henning, H. Mutschke
core +2 more sources
Filament Formation due to Diffusive Instabilities in Dusty Protoplanetary Disks
The Astrophysical JournalWe report the finding of a new, local diffusion instability in a protoplanetary disk which can operate in a dust fluid, subject to mass diffusion, shear viscosity, and dust–gas drag, provided the diffusivity, viscosity, or both, decrease sufficiently ...
Konstantin Gerbig +2 more
doaj +1 more source
Thermal history of an amoeboid olivine aggregate in the early solar nebula
Meteoritics &Planetary Science, EarlyView.Abstract Carbonaceous chondrites commonly contain amoeboid olivine aggregates (AOAs). Here, we investigated an AOA in the CR chondrite Y‐793261. This AOA contains an unstable assemblage of forsterite and quartz. We found a rare occurrence of enstatite and quantitatively discuss its formation process.
M. Kimura +3 more
wiley +1 more source
Diffusive Instabilities in Dusty Disks: Linear Growth and Nonlinear Breakdown
The Astrophysical JournalWe revisit the diffusive instability in dusty disks that arises when the dust mass diffusivity and/or viscosity decrease sufficiently steeply with increasing dust density. Our updated model includes an incompressible viscous gas that responds azimuthally
Konstantin Gerbig, Min-Kai Lin
doaj +1 more source
Ray-tracing Simulations and Spectral Models of X-Ray Radiation in Dusty Media
The Astrophysical Journal, 2023 Dust can play an important role in shaping the X-ray spectra and images of astrophysical sources. In this work we report on the implementation of dust in the ray-tracing platform RefleX .
Claudio Ricci, Stéphane Paltani
doaj +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract Public fascination with impact craters often drives bold speculations, but rigorous verification is critical. In southeastern Bavaria, numerous depressions have been proposed to represent impact craters associated with a catastrophic event in Celtic times (between 900 BC and 600 BC)—the so called “Chiemgau Impact.” To date, the evidence ...
Robert Huber +2 more
wiley +1 more source
General Implicit Runge–Kutta Integrators for Multifluid Gas–Dust Aerodynamic Drag
The Astrophysical JournalThe integration of aerodynamic drag is a fundamental step in simulating dust dynamics in hydrodynamical simulations. We propose a novel integration scheme, designed to be compatible with Strang splitting techniques, which allows for the straightforward ...
Giovanni Tedeschi-Prades +4 more
doaj +1 more source
A Catalog of 71 Coronal Line Galaxies in MaNGA: [Ne v] Is an Effective AGN Tracer
The Astrophysical Journal, 2023 Despite the importance of active galactic nuclei (AGNs) in galaxy evolution, accurate AGN identification is often challenging, as common AGN diagnostics can be confused by contributions from star formation and other effects (e.g., Baldwin–Phillips ...
James Negus +7 more
doaj +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract Apatite is often the most rare earth element (REE)‐enriched mineral in chondritic meteorites. REE enrichment and fractionation levels in apatite grains can give insight into the aqueous fluids in which they formed and the conditions prevailing within the host body. In this study, we applied synchrotron X‐ray fluorescence (SXRF) spectroscopy to
B. J. Tkalcec +17 more
wiley +1 more source