Results 21 to 30 of about 550 (177)

Nonequilibrium Ionization Modeling of Petschek-type Shocks in Reconnecting Current Sheets in Solar Eruptions

open access: yesThe Astrophysical Journal, 2023
Nonequilibrium ionization (NEI) is essentially required for astrophysical plasma diagnostics once the plasma status departs from the assumption of ionization equilibrium.
Chengcai Shen   +2 more
doaj   +1 more source

The Formation of Star-forming Disks in the TNG50 Simulation

open access: yesThe Astrophysical Journal, 2023
We investigate the disk formation process in the TNG50 simulation, examining the profiles of SFR surface density (Σ _SFR ), gas inflow and outflow, and the evolution of the angular momentum of inflowing gas particles.
Enci Wang, Simon J. Lilly
doaj   +1 more source

Observations of ‘wisps’ in magnetohydrodynamic simulations of the Crab Nebula [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2009
Submitted to ...
Camus, NF   +3 more
openaire   +5 more sources

Boundary Treatment for the Subsonic/Alfvénic Inner Boundary at 2.5 R ⊙ in a Time-dependent 3D Magnetohydrodynamics Solar Wind Simulation Model

open access: yesThe Astrophysical Journal Supplement Series, 2023
A new magnetohydrodynamics (MHD) simulation model of the global solar corona and solar wind is presented. The model covers the range of heliocentric distance from 2.5 solar radii, so that coronal mass ejections at the earliest phase near the Sun can be ...
Keiji Hayashi, Chin-Chun Wu, Kan Liou
doaj   +1 more source

A New Tool for Understanding the Solar Wind–Venus Interaction: Three-dimensional Multifluid MHD Model

open access: yesThe Astrophysical Journal, 2023
In this paper, we present a new tool to investigate the interaction of the solar wind with Venus with the approach of a global multifluid magnetohydrodynamics (MHD) model. The continuity, momentum, and energy equations for H ^+ , O ^+ , ${{\rm{O}}}_{2}^{+
Tong Dang   +7 more
doaj   +1 more source

Radiation magnetohydrodynamics in global simulations of protoplanetary discs [PDF]

open access: yesAstronomy & Astrophysics, 2013
Our aim is to study the thermal and dynamical evolution of protoplanetary disks in global simulations, including the physics of radiation transfer and magneto-hydrodynamic (MHD) turbulence caused by the magneto-rotational instability. We develop a radiative transfer method based on the flux-limited diffusion approximation that includes frequency ...
Flock, M.   +3 more
openaire   +4 more sources

Simulating the Photospheric to Coronal Plasma Using Magnetohydrodyanamic Characteristics. II. Reflections on Non-reflecting Boundary Conditions

open access: yesThe Astrophysical Journal
We present our implementation of non-reflecting boundary conditions in the magnetohydrodynamics (MHD) code LaRe3D. This implementation couples a characteristics-based boundary condition with a Lagrangian remap code, demonstrating the generality and ...
N. Dylan Kee   +4 more
doaj   +1 more source

MAGNETOHYDRODYNAMIC SIMULATIONS OF HOT JUPITER UPPER ATMOSPHERES [PDF]

open access: yesThe Astrophysical Journal, 2014
Two-dimensional simulations of hot Jupiter upper atmospheres including the planet's magnetic field are presented. The goal is to explore magnetic effects on the layer of the atmosphere that is ionized and heated by stellar EUV radiation, and the imprint of these effects on the Ly$α$ transmission spectrum.
Trammell, George B.   +2 more
openaire   +2 more sources

Probing Electrocatalyst Design for Product Selectivity in CO2 Reduction

open access: yesAdvanced Science, EarlyView.
Selective CO2 electroreduction is controlled by catalyst structure, dynamic surface reconstruction, adsorbate interactions, and reaction microenvironment. This review summarizes Cu‐ and non‐Cu‐based catalysts, single‐atom and molecular systems, degradation pathways, and operando/computational strategies for steering CO2RR toward hydrocarbons ...
Suvodeep Sen   +5 more
wiley   +1 more source

Recurrent Eruptions from the Emergence of a Toroidal Flux Tube

open access: yesThe Astrophysical Journal
Solar eruptive behavior is often modeled with magnetohydrodynamic simulations of magnetic flux emergence. The usual geometry considered is that of a horizontal cylindrical magnetic flux tube.
J. Zhuleku, V. Archontis, K. Moraitis
doaj   +1 more source

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