Magnetic field inclination and atmospheric oscillations above solar active regions [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 Recent observational evidence for magnetic field direction effects on helioseismic signals in sunspot penumbrae is suggestive of magnetohydrodynamic (MHD) mode conversion occurring at lower levels. This possibility is explored using wave mechanical and ray theory in a model of the Sun's surface layers permeated by uniform inclined magnetic field. It is
H. Schunker, P. S. Cally
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MAGNETIC STRUCTURE PRODUCING X- AND M-CLASS SOLAR FLARES IN SOLAR ACTIVE REGION 11158 [PDF]
, 2013 We study the three-dimensional magnetic structure of the solar active region 11158, which produced one X-class and several M-class flares on 2011 February 13–16. We focus on the magnetic twist in four flare events, M6.6, X2.2, M1.0, and M1.1.
S. Inoue +4 more
semanticscholar +1 more source
Investigating Energetic X-Shaped Flares on the Outskirts of A Solar Active Region [PDF]
Scientific Reports, 2016 Typical solar flares display two quasi-parallel, bright ribbons on the chromosphere. In between is the polarity inversion line (PIL) separating concentrated magnetic fluxes of opposite polarity in active regions (ARs).
Rui Liu, Jun Chen, Yuming Wang, Kai Liu
semanticscholar +1 more source
THE DEPENDENCE OF STELLAR MASS AND ANGULAR MOMENTUM LOSSES ON LATITUDE AND THE INTERACTION OF ACTIVE REGION AND DIPOLAR MAGNETIC FIELDS [PDF]
, 2015 Rotation evolution of late-type stars is dominated by magnetic braking and the underlying factors that control this angular momentum loss are important for the study of stellar spin-down.
C. Garraffo, J. Drake, O. Cohen
semanticscholar +1 more source
Magnetohydrodynamic Modeling of a Solar Eruption Associated with an X9.3 Flare Observed in the Active Region 12673 [PDF]
Astrophysical Journal, 2018 On 2017 September 6, the solar active region 12673 produced an X9.3 flare, regarded to be the largest to have occurred in solar cycle 24. In this work we have performed a magnetohydrodynamic (MHD) simulation in order to reveal the three-dimensional (3D ...
S. Inoue +3 more
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Current helicity and magnetic field anisotropy in solar active regions [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 MNRAS ...
Xu, H. +5 more
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HOW DID A MAJOR CONFINED FLARE OCCUR IN SUPER SOLAR ACTIVE REGION 12192? [PDF]
, 2016 We study the physical mechanism of a major X-class solar flare that occurred in the super NOAA active region (AR) 12192 using data-driven numerical magnetohydrodynamic (MHD) modeling complemented with observations.
Chaowei Jiang +5 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan +9 more
wiley +1 more source
The Sources of Magnetic Field Twist in Solar Active Regions [PDF]
The Astrophysical Journal, 2002 Observations have revealed that a hemispheric preference of magnetic chirality (handedness) exists throughout the solar atmosphere. For example, the current helicity of active regions is predominantly negative (left-handed twist) in the northern hemisphere and positive (right-handed twist) in the southern.
S. D. Bao, T. Sakurai, Y. Suematsu
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Atomic Size Misfit for Electrocatalytic Small Molecule Activation
Advanced Functional Materials, EarlyView.This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong +3 more
wiley +1 more source