Results 61 to 70 of about 353,818 (294)

Exploring the Connection between Helioseismic Travel Time Anomalies and the Emergence of Large Active Regions during Solar Cycle 24

The Astrophysical Journal, 2023
We investigate deviations in the mean phase travel time of acoustic waves preceding the emergence of 46 large active regions observed by the Helioseismic and Magnetic Imager.
John T. Stefan, Alexander G. Kosovichev
doaj   +1 more source

Trap‐Modified Inverted Organic Photodetectors via Layer‐by‐Layer Processing with Poly(N‐vinylcarbazole) Additives

Advanced Functional Materials, EarlyView.
Trap state engineering in inverted organic photodetectors (OPDs) is achieved via combined layer‐by‐layer (LbL) processing and poly(N‐vinylcarbazole) (PVK) incorporation. LbL reduces the trap density while PVK additives gradually shift trap states from shallow band‐edge to deep mid‐gap levels, tailoring the energy distribution.
Jingwei Yi, Yi Yang, Yusen Pei, Apurva Gadikar, Vahid Mahdikhah, Myratgeldi Kotyrov, Seung Hyun Kim, Kenan Gundogdu, Wei You, Harald Ade, Franky So   +10 more
wiley   +1 more source

The Relationship Between Plasma Flow Doppler Velocities and Magnetic Field Parameters During the Emergence of Active Regions at the Solar Photospheric Level

, 2012
A statistical study has been carried out of the relationship between plasma flow Doppler velocities and magnetic field parameters during the emergence of active regions at the solar photospheric level with data acquired by the Michelson Doppler Imager ...
A. Khlystova, A. Khlystova, A. Lagg, A.A. Golovko, B.W. Lites, C. Zwaan, C. Zwaan, C.E. Parnell, C.S. Barth, D. Bonaccini, D. Chou, E.N. Frazier, E.N. Parker, G. Bachmann, H.B. Snodgrass, H.B. Snodgrass, H.J. Hagenaar, I. Kawaguchi, J.I. Garcia de La Rosa, J.J. Brants, J.J. Brants, J.J. Brants, K. Otsuji, K. Shibata, K.-S. Cho, K.L. Harvey, L.H. Strous, M. Kubo, P.H. Scherrer, R.K. Ulrich, S. Toriumi, S. Toriumi, S.A. Schoolman, S.I. Gopasyuk, S.I. Gopasyuk, S.K. Solanki, S.L. Guglielmino, S.L. Keil, T. Bai, T.D. Tarbell, V. Archontis, V.M. Grigor’ev, V.M. Grigor’ev, V.M. Grigor’ev, Y. Liu, Z. Xu   +45 more
core   +1 more source

Solar Heating Enhanced Selective Recovery of Metal Ions Through Flowing Electrodes Enabled by Hybrid Carbon Nanostructures

Advanced Functional Materials, EarlyView.
A new electrochemical system based on a microporous hybrid of carbon nanoplatelets and nanotubes to selectively capture Ni2+ from wastewater is constructed. The system temperature rises rapidly when irradiated with sunlight, which enhances the Ni2+ removal rate by 250% and the selectivity by 53%, and the energy consumption is also reduced by 51 ...
Ziquan Wang, Jiaqi Chen, Qiuru Lin, Mingxing Liang, Bo Yang, Yantao Chen, Minjun Kim, Yusuke Yamauchi, Stephen J. Eichhorn, Zhiqun Lin, Magdalena Titirici, Libo Deng   +11 more
wiley   +1 more source

Hemispheric Helicity Trend for Solar Cycle 24

, 2011
Using vector magnetograms obtained with the Spectro-polarimeter (SP) on aboard Hinode satellite, we studied two helicity parameters (local twist and current helicity) of 64 active regions occurred in the descending phase of solar cycle 23 and the ...
Bao, Bao, Choudhuri, Hagino, Hagino, Heyvaerts, Lites, Longcope, Moffatt, Pevtsov, Pevtsov, Su, Tiwari, Zhang, Zhang, Zhang   +15 more
core   +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

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

Efficient NiOx Hole Transport Layers Enabled by Multifunctional MXenes for High‐Performance Tin‐Lead Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
An efficient NiOx HTL is successfully prepared by introducing MXene as an additive without further surface modification to fabricate high‐performance FASn0.5Pb0.5I3 perovskite solar cells. The introduction of MXene contributes to improved conductivity of NiOx, better aligned at NiOx/perovskite interfaces, and enhanced quality of perovskite films ...
Lijun Chen, Guanqi Tang, Yanghou Wang, Xiaolong Cao, Junjun Jin, Jie Tang, Liyang Yu, Zheng Zhou, Peng You, Hanlin Hu, Weiqing Yang, Qidong Tai, Feng Yan   +12 more
wiley   +1 more source

Energy and helicity budgets of solar quiet regions

, 2014
We investigate the free magnetic energy and relative magnetic helicity budgets of solar quiet regions. Using a novel non-linear force-free method requiring single solar vector magnetograms we calculate the instantaneous free magnetic energy and relative ...
Georgoulis, M. K., Kontogiannis, I., Tsiropoula, G., Tziotziou, K.   +3 more
core   +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