Results 71 to 80 of about 355,664 (292)

Radio Emissions from Solar Active Regions [PDF]

Space Science Reviews, 2007
Solar active region coronae are known for strong magnetic fields permeating tenuous plasma, which makes them an ideal astronomical laboratory for magnetohydrodynamics research. It is, however, relatively less known that this physical condition also permits a very efficient radiation mechanism, gyro-resonant emission, produced by hot electrons gyrating ...
openaire   +1 more source

Spectroscopic Observations of Fe XVIII in Solar Active Regions

, 2012
The large uncertainties associated with measuring the amount of high temperature emission in solar active regions represents a significant impediment to making progress on the coronal heating problem. Most current observations at temperatures of 3 MK and
Cargill, Doschek, Feldman, Kink, Klimchuk, Ko, Reale, Reale, Reale, Redfield, Schmelz, Schmelz, Schmelz, Testa, Testa, Warren, Warren, Winebarger, Winebarger   +18 more
core   +1 more source

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

Advanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai, Xiaoyu Huo, Xin Long, Enkang Fu, Xusong Gong, Lei Wei, Liang An   +6 more
wiley   +1 more source

Changes of Magnetic Energy and Helicity in Solar Active Regions from Major Flares

The Astrophysical Journal, 2023
Magnetic free energy powers solar flares and coronal mass ejections, and the buildup of magnetic helicity might play a role in the development of unstable structures that subsequently erupt.
Yang Liu, Brian T. Welsch, Gherardo Valori, Manolis K. Georgoulis, Yang Guo, Etienne Pariat, Sung-Hong Park, Julia K. Thalmann   +7 more
doaj   +1 more source

The Origin of Solar Activity in the Tachocline

, 2007
Solar active regions, produced by the emergence of tubes of strong magnetic field in the photosphere, are restricted to within 35 degrees of the solar equator.
Dikpati M., D’Silva S., Kristen Menou, Kyle P. Parfrey, Schussler M., Spiegel E. A., Spruit H. C., Tayler R. J.   +7 more
core   +2 more sources

In‐Situ Solution Complexation for n‐Type Surface‐Energetics Reconstruction in 2.0 eV Ultra‐Wide‐Bandgap Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
A reactive in situ solution complexation strategy reconstructs the surface of 2.0 eV ultra‐wide‐bandgap perovskites via proton transfer. This chemical modulation eliminates metallic defects and induces a degenerate‐like n‐type surface, establishing an Ohmic tunneling contact.
Saemon Yoon, Han‐Gyun Lim, Jinyoung Kim, Gyu Min Kim, Seojun Lee, Jun Ryu, SungWon Cho, Jincheol Kim, Hyosung Choi, Jung Sang Cho, Jongsung Park, Dong‐Won Kang   +11 more
wiley   +1 more source

First Insights into the Applicability and Importance of Different 3D Magnetic Field Extrapolation Approaches for Studying the Preeruptive Conditions of Solar Active Regions

The Astrophysical Journal
The three-dimensional (3D) coronal magnetic field has not yet been directly observed. However, for a better understanding and prediction of magnetically driven solar eruptions, 3D models of solar active regions are required.
Marianna B. Korsós, Robert Jarolim, Robertus Erdélyi, Astrid M. Veronig, Huw Morgan, Francesca Zuccarello   +5 more
doaj   +1 more source

Formation and Dynamics in an Observed Preeruptive Filament

The Astrophysical Journal Letters, 2023
The formation of filaments/prominences is still a debated topic. Many different processes have been proposed: levitation, injection of cool plasma, merging filaments, and cooling plasma in hot loops.
Jing Huang, Yin Zhang, Baolin Tan, Xianyong Bai, Leping Li, Zhenyong Hou, Xiao Yang, Kaifan Ji, Yongliang Song, Ziyao Hu, Yuanyong Deng   +10 more
doaj   +1 more source

Establishing a Model Precursor System: Over a Decade of Research on Carbon Dots from the Citric Acid‐Urea System

Advanced Functional Materials, EarlyView.
The citric acid/urea (CA‐Urea) precursor system offers a versatile, scalable route to carbon dots with tunable luminescence and multifunctionality. Mechanistic insights into precursor chemistry and reaction parameters have enabled doping, surface modification, and hybridization strategies, yielding CDs for luminescent devices, sensing, catalysis ...
Yupeng Liu, Zhiqi Cai, Xiangxin Sun, Hanyi Zhang, Yiming Hao, Jun Wu, Zekun Yan, Xue Wu, Yiqi Liang, Liming Wang, Songnan Qu   +10 more
wiley   +1 more source

SOLAR TRANSITION REGION IN THE QUIET SUN AND ACTIVE REGIONS

, 2010
The solar transition region (TR), in which above the photosphere the tempera- ture increases rapidly and the density drops dramatically, is believed to play an important role in coronal heating and solar wind acceleration. Long-lasting up-flows are present in the upper TR and interpreted as signatures of mass supply to large coronal loops in the quiet ...
Tian, H., Curdt, W., He, J. -S.
openaire   +2 more sources