Results 61 to 70 of about 27,054 (290)
Dust in a Type Ia Supernova Progenitor: Spitzer Spectroscopy of Kepler's Supernova Remnant [PDF]
, 2012 Characterization of the relatively poorly-understood progenitor systems of Type Ia supernovae is of great importance in astrophysics, particularly given the important cosmological role that these supernovae play. Kepler's Supernova Remnant, the result of
Blair, William P. +6 more
core +3 more sources
Heavily irradiated grains and neon isotope anomalies in carbonaceous chondrites
The Astrophysical Journal, 1976 High-voltage microscope observations of micron-sized grains extracted from a /sup 22/Ne-rich fraction of the Orgueil meteorite give strong experimental evidence for their heavy irradiation. It is further suggested that the excess of /sup 22/Ne measured in the same mineral separate can be explained by low-energy (
Audouze, J. +4 more
openaire +2 more sources
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We propose an updated dust evolution model that focuses on the grain size distribution in a galaxy. We treat the galaxy as a one-zone object and include five main processes (stellar dust production, dust destruction in supernova shocks, grain growth by accretion and coagulation, and grain disruption by shattering). In this paper,
openaire +2 more sources
Laboratory Experiments on the Low-temperature Formation of Carbonaceous Grains in the ISM [PDF]
The Astrophysical Journal Supplement Series, 2017 Abstract The life cycle of cosmic dust grains is far from being understood and the origin and evolution of interstellar medium (ISM) grains is still under debate. In the ISM, the cosmic dust destruction rate is faster than the production rate by stellar sources.
Daniele Fulvio +4 more
openaire +2 more sources
Advanced Engineering Materials, EarlyView.High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé +5 more
wiley +1 more source
Lithosphere, 2022 Raman spectroscopy of carbonaceous material (RSCM) thermometry is an effective method to determine the thermal structure of metasedimentary domains with high spatial resolution.
Ken Yamaoka +3 more
doaj +1 more source
Modelling dust extinction in the Magellanic Clouds [PDF]
, 2015 We model the extinction profiles observed in the Small and Large Magellanic clouds with a synthetic population of dust grains consisting by core-mantle particles and a collection of free-flying polycyclic aromatic hydrocarbons.
Aresu, Giambattista +4 more
core +2 more sources
THE 6 μm FEATURE AS A TRACER OF ALIPHATIC COMPONENTS OF INTERSTELLAR CARBONACEOUS GRAINS [PDF]
The Astrophysical Journal, 2016 ABSTRACT An unidentified infrared emission (UIE) feature at 6.0 μm is detected in a number of astronomical sources showing the UIE bands. In contrast to the previous suggestion that this band is due to C=O vibrational modes, we suggest that the 6.0 μm feature arises from olefinic double-bond functional groups.
Chih-Hao Hsia 夏志浩 +3 more
openaire +6 more sources
Advanced Engineering Materials, EarlyView.A numerical model resulting from irreversible thermodynamics for describing transport processes is introduced, focusing on thermodynamic activity gradients as the actual driving force for diffusion. Implemented in CUDA C++ and using CalPhaD methods for determining the necessary activity data, the model accurately simulates interdiffusion in aluminum ...
Ulrich Holländer +3 more
wiley +1 more source
The Astrophysical JournalThe dusty interstellar medium (ISM) of the Milky Way is distributed in a complex, cloudy structure. It is fundamental to the radiation balance within the Milky Way, provides a reaction surface to form complex molecules, and is the feedstock for future ...
S. T. Zeegers +35 more
doaj +1 more source