Results 91 to 100 of about 584 (191)
The Astrophysical JournalMagnetohydrodynamic turbulence can drive significant temperature fluctuations in the accretion disk of an active galactic nucleus (AGN). As a result, the disk can be highly inhomogeneous and has a half-light radius larger than the static Shakura and ...
Guowei Ren +3 more
doaj +1 more source
Predicting Coronal Mass Ejection Travel Times Using Enhanced Model‐Guided Machine Learning
Space Weather, Volume 24, Issue 8, August 2026.Abstract Coronal mass ejections (CMEs) are key drivers of space weather events, posing risks to both space‐borne and ground‐based systems. An accurate prediction of their arrival time at Earth is critical for impact mitigation. To this end, physics‐informed artificial intelligence (AI) approaches have proven more effective than purely data‐driven or ...
M. Lampani +4 more
wiley +1 more source
电力工程技术To address the issue of decreased reliability in power transmission caused by the incapability of existing parallel protection gaps to actively extinguish arcs，a method utilizing the power-flow current flowing through coil to generate a magnetic field ...
Xiong LI +5 more
doaj +1 more source
Alfvénic Poynting Flux Characterized by a Substorm‐SMC Cycle and Ionospheric Influence
Space Weather, Volume 24, Issue 8, August 2026.Abstract Geomagnetic substorms are fundamental processes of explosive geospace energy release within the Earth's magnetotail, which are usually divided into three phases: the growth phase, the expansion phase, and the recovery phase. Large‐scale electromagnetic energy transport during a geomagnetic substorm is in the form of Alfvén waves, transmitting ...
Qianfeng Yin +9 more
wiley +1 more source
Merged Interplanetary Data From L1: MIDL
Space Weather, Volume 24, Issue 8, August 2026.Abstract The availability and accuracy of upstream solar wind conditions are critical for solar wind—magnetosphere coupling studies, whether based on observations or numerical models and simulations. We present the Merged Interplanetary Data from L1 (MIDL), which merges 1‐min magnetic field and plasma observations from ACE, DSCOVR, and Wind through a ...
C. C. DiMarco, G. Tóth, T. I. Pulkkinen
wiley +1 more source
Multiple Protostellar Outflows from a Single Protostar with a Misaligned Disk
The Astrophysical JournalWe investigate how misalignment between the core angular momentum and the large-scale magnetic field affects protostellar outflows, and whether a single protostellar system can drive multiple outflow components.
Shingo Hirano +2 more
doaj +1 more source
Astronomy & AstrophysicsCoronal mass ejections (CMEs) are the primary drivers of adverse space-weather events, yet their initiation and onset prediction remain insufficiently understood due to the complexity of the magnetic topology and physical processes in real solar source ...
Guo J. H. +10 more
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How Does the Critical Torus Instability Height Vary with the Solar Cycle?
The Astrophysical JournalThe ideal magnetohydrodynamic torus instability can drive the eruption of coronal mass ejections. The critical threshold of magnetic field strength decay for the onset of the torus instability occurs at different heights in different solar active regions,
Alexander W. James +4 more
doaj +1 more source
Research Progress and Prospects on Pantograph-Catenary Arcing in Urban Rail Transit
Chengshi guidao jiaotong yanjiu［Objective］ Pantograph-catenary (PC) arcing degrades the train current collection quality, causes ablation of pantograph carbon strips and contact wires, and consequently affects safety and stability of train operation.
ZHANG Yuhang +3 more
doaj +1 more source
Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope
The Astrophysical JournalObservations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions under which ...
T. Török +6 more
doaj +1 more source