Results 41 to 50 of about 355,664 (292)
Complex Network for Solar Active Regions [PDF]
The Astrophysical Journal, 2017 Abstract In this paper we developed a complex network of solar active regions (ARs) to study various local and global properties of the network. The values of the Hurst exponent (0.8–0.9) were evaluated by both the detrended fluctuation analysis and the rescaled range analysis applied on the time series of the AR numbers.
Farhad Daei +2 more
openaire +2 more sources
The Origin of Helicity in Solar Active Regions
, 2004 We present calculations of helicity based on our solar dynamo model and show that the results are consistent with observational data.Comment: To appear in the Proceedings of IAU Symposium ...
Chatterjee, Piyali +2 more
core +1 more source
Current helicity constraints in solar dynamo models [PDF]
, 2012 We investigate to what extent the current helicity distribution observed in solar active regions is compatible with solar dynamo models. We use an advanced 2D mean-field dynamo model with dynamo action largely concentrated near the bottom of the ...
Gao, Yu +7 more
core +1 more source
Advanced Functional Materials, EarlyView.A chiral photodetector capable of selectively distinguishing left‐ and right‐handed circularly polarized light is experimentally demonstrated. The device, which features a nanopatterned electrode inverse‐designed by a genetic algorithm within a metal–dielectric–metal nanocavity that incorporates a vacuum‐deposited small‐molecule multilayer, exhibits ...
Kyung Ryoul Park +3 more
wiley +1 more source
The Magnetic Energy - Helicity Diagram of Solar Active Regions
, 2012 Using a recently proposed nonlinear force-free method designed for single vector magnetograms of solar active regions we calculate the instantaneous free magnetic energy and relative magnetic helicity budgets in 162 vector magnetograms corresponding to ...
Georgoulis, Manolis K. +2 more
core +1 more source
Flows at the Edge of an Active Region: Observation and Interpretation [PDF]
, 2012 Upflows observed at the edges of active regions have been proposed as the source of the slow solar wind. In the particular case of Active Region (AR) 10942, where such an upflow has been already observed, we want to evaluate the part of this upflow that ...
Boutry, Céline +3 more
core +2 more sources
From Single Atoms to Nanoparticles: Pathways Toward Efficient and Durable Pt/TiO2 Photocatalysts
Advanced Functional Materials, EarlyView.Platinum single atoms on TiO2 nanosheets evolve into clusters and nanoparticles under ethanol photoreforming and thermal treatments. By controlling deposition and post‐treatments, particle size and location on specific facets are modulated. The study reveals how stability pathways determine efficiency, guiding the design of more durable photocatalysts.
Juan José Delgado +6 more
wiley +1 more source
Light Bridges and Solar Active Region Evolution Processes
The Astrophysical Journal Supplement SeriesThe formation mechanism of light bridges (LBs) is strongly related to the dynamic evolution of solar active regions (ARs). To study the relationship between LB formation and AR evolution phases, we employ 109 LB samples from 69 ARs in 2014 using ...
Fuyu Li +7 more
doaj +1 more source
Cancellation analysis of current density in solar active region NOAA10019
Journal of Space Weather and Space Climate, 2015 Solar flares are often associated with changes in the fine magnetic structure of the emitting active region. Such topological modification results in variations of both the scaling properties of the fields’ fluctuations, and the fractal dimension of the ...
De Vita Gaetano +7 more
doaj +1 more source
Source Regions of Coronal Mass Ejections
, 2001 Observations of the solar corona with the Large Angle Spectrometric Coronograph (LASCO) and Extreme ultraviolet Imaging Telescope (EIT) instruments on the Solar and Heliospheric Observatory (SOHO) provide an unprecedented opportunity to study coronal ...
Delannee C. +2 more
core +1 more source