Results 41 to 50 of about 36,246 (179)

Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model

Systems Research and Behavioral Science, EarlyView.
ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley   +1 more source

Diffusive Instabilities in Dusty Disks: Linear Growth and Nonlinear Breakdown

The Astrophysical Journal
We 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

Dust dynamic pressure and magnetopause displacement: reasons for non-detection [PDF]

Annales Geophysicae, 2013
In a recent paper, Treumann and Baumjohann (2011) propose that the contribution of dust particles to the solar wind dynamic pressure can cause large compressions of the Earth's magnetopause and suggest that this occurs when Earth encounters ...
I. Mann, M. Hamrin
doaj   +1 more source

Far-Infrared to Millimeter Astrophysical Dust Emission. II: Comparison of the Two-Level Systems (TLS) model with Astronomical Data

, 2011
In a previous paper we proposed a new model for the emission by amorphous astronomical dust grains, based on solid-state physics. The model uses a description of the Disordered Charge Distribution (DCD) combined with the presence of Two-Level Systems ...
Agladze, Anderson, Andriesse, Benoît, Bernard, Bot, Boudet, Boulanger, Bösch, C. Mény, D. Paradis, Dale, Dickey, Dickinson, Draine, Dupac, Dupac, Dupac, Désert, Finkbeiner, Finkbeiner, Fitzgerald, Fitzgerald, Galliano, Hubbard, J.-P. Bernard, Jarosik, Johnstone, Kemper, Malinen, Mennella, Miville-Deschênes, Mény, Paradis, Paradis, Phillips, Phillips, Planck collaboration, Planck collaboration, Planck collaboration, Planck collaboration, Planck collaboration, Planck collaboration, Planck collaboration, Reach, Schlegel, Schlömann, Shetty, Stepnik, V. Gromov, Veneziani, Vinogradov   +51 more
core   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

General Implicit Runge–Kutta Integrators for Multifluid Gas–Dust Aerodynamic Drag

The Astrophysical Journal
The 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, Til Birnstiel, Klaus Dolag, Barbara Ercolano, Mark Hutchison   +4 more
doaj   +1 more source

Diagnosing 0.1–10 au Scale Morphology of the FU Ori Disk Using ALMA and VLTI/GRAVITY [PDF]

, 2019
We report new Atacama Large Millimeter/submillimeter Array Band 3 (86–100 GHz; ~80 mas angular resolution) and Band 4 (146–160 GHz; ~50 mas angular resolution) observations of the dust continuum emission toward the archetypal and ongoing accretion burst ...
Dunham, Michael M., Galvin-Madrid, Roberto, Green, Joel D., Hales, Antonio S., Hasegawa, Yasuhiro, Henning, Thomas, Kospal, Agnes, Liu, Hauyu Baobab, Merand, Antoine, Perez, Sebastian, Takami, Michihiro, Vorobyov, Eduardo I., Yang, Yao-Lun, Zhu, Zhaohuan   +13 more
core   +3 more sources

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source

Toward a General Theory of Grain Alignment and Disruption by Radiative Torques and Magnetic Relaxation

The Astrophysical Journal
We 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
doaj   +1 more source

Formation of PAHs and Carbonaceous Solids in Gas-Phase Condensation Experiments [PDF]

, 2009
Carbonaceous grains represent a major component of cosmic dust. In order to understand their formation pathways, they have been prepared in the laboratory by gas-phase condensation reactions such as laser pyrolysis and laser ablation.
Allain, Baum, Boulanger, C. Jäger, Cao, Cherchneff, Cherchneff, Clayton, Draine, Drilling, F. Huisken, Foing, H. Mutschke, Hrivnak, I. Llamas Jansa, Jäger, Jäger, Jäger, Kwok, Kwok, Lederer, Lodders, Monier, Nuccitelli, Schnaiter, Sellgren, Th. Henning, Vijh   +27 more
core   +1 more source