Results 51 to 60 of about 13,165 (147)
Collisional evolution of dust aggregates. From compaction to catastrophic destruction [PDF]
Astronomy & Astrophysics, 2009 The coagulation of dust aggregates occurs in various astrophysical environments. Each one is characterized by different conditions that influence the growth, e.g. relative velocities, composition, and size of the smallest constituents (monomers). Here we study the microphysics of collisions of dust aggregates in a four-dimensional parameter space.
Paszun, D., Dominik, C.
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A Rotational Disruption Crisis for Zodiacal Dust
The Astrophysical Journal LettersA systematic torque from anisotropic radiation can rapidly spin up irregular grains to the point of breakup. We apply the standard theory of rotational disruption from radiative torques to solar system grains, finding that grains with radii ∼0.03–3 μ m ...
Kedron Silsbee +4 more
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Energies, 2022 One of the main causes of damage to the elements of coal-fired boilers installations, leading to breakdowns and, consequently, a shutdown of the block, are erosive processes. Unfortunately, there is not much research conducted on dust erosion of the dust
Bartłomiej Hernik
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SPITZEROBSERVATIONS OF DUST DESTRUCTION IN THE PUPPIS A SUPERNOVA REMNANT [PDF]
The Astrophysical Journal, 2010 Imaging and spectral observations of the Puppis A supernova remnant (SNR) with the Spitzer Space Telescope confirm that its IR emission is dominated by the thermal continuum emission of swept-up interstellar dust which is collisionally heated by the X-ray emitting gas of the SNR.
Arendt, Richard G. +8 more
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The Astrophysical Journal LettersRecent observations have revealed that dust is widespread and abundant in galaxies up to z ≃ 8, significantly influencing their appearance and spectral properties.
He Zhao, Bingqiu Chen, Jun Li
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The Astrophysical JournalWe generalize the magnetically enhanced radiative torque (MRAT) theory for astrophysical environments described by a dimensionless parameter U /( n _1 T _2 ) with U the radiation strength, n _1 = n _H /(10 cm ^−3 ) the normalized hydrogen density, and ...
Thiem Hoang
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Chemical Reactions and Dust Destruction in Protoplanetary Accretion Disks [PDF]
International Astronomical Union Colloquium, 1996 AbstractA nonequilibrium calculation for the chemistry in a classical protoplanetary accretion disk is presented. Slow radial particle transport moves grains from the cold outer regions of a protoplanetary accretion disk into its warm central part where grains are destroyed.
Frédéric Finocchi +3 more
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A Clay-Based Geopolymer in Loess Soil Stabilization
Applied Sciences, 2020 Soil erosion has environmental and socioeconomic significances. Loess soils cover about 10% of the global land area. Most of these soils are subjected to increased land uses such as unpaved roads, which increase soil destruction and dust emission to the ...
Nadav Hanegbi, Itzhak Katra
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The Astrophysical JournalThe inner regions of protoplanetary disks are host to the sublimation of dust grains, a process traditionally modeled using equilibrium thermodynamics.
Sheng Xu +4 more
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Dust Survival in Galactic Winds
The Astrophysical JournalWe present a suite of high-resolution numerical simulations to study the evolution and survival of dust in hot galactic winds. We implement a novel dust framework in the Cholla hydrodynamics code and use wind tunnel simulations of cool, dusty clouds to ...
Helena M. Richie +3 more
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