Results 31 to 40 of about 355,664 (292)

Current Helicity and Twist as Two Indicators of The Mirror Asymmetry of solar Magnetic Fields

, 2008
A comparison between the two tracers of magnetic field mirror asymmetry in solar active regions, twist and current helicity, is presented. It is shown that for individual active regions these tracers do not possess visible similarity while averaging by ...
A.A. Pevtsov, A.R. Choudhuri, D. N. Tomin, D. Sokoloff, D. Sokoloff, D.M. Rust, E.N. Parker, E.N. Parker, E.N. Parker, H. Xu, H. Zhang, H. Zhang, H. Zhang, H. Zhang, J. Zhao, K. M. Kuzanyan, K.M. Kuzanyan, L. Gizon, L. Woltjer, M. Hagino, N. Kleeorin, N. Kleeorin, N. Seehafer, S.D. Bao, S.D. Bao, T.J. Wang, V. N. Obridko, V. N. Tutubalin, V.I. Abramenko, V.I. Abramenko, Yu.B. Ponomarenko, Yu.B. Ponomarenko   +31 more
core   +1 more source

Case studies of multi-day 3He-rich solar energetic particle periods

, 2015
Context. Impulsive solar energetic particle events in the inner heliosphere show the long-lasting enrichment of 3He. Aims. We study the source regions of long-lasting 3He-rich solar energetic particle (SEP) events Methods. We located the responsible open
Bucik, Radoslav., Chen, Nai-hwa, Innes, Davina. E., Mason, Glenn. M.   +3 more
core   +1 more source

Magnetic Reconnection between a Solar Jet and a Filament Channel

The Astrophysical Journal
The solar corona is highly structured by bunches of magnetic field lines forming either loops, or twisted flux ropes representing prominences/filaments, or very dynamic structures such as jets.
Garima Karki, Brigitte Schmieder, Pooja Devi, Ramesh Chandra, Nicolas Labrosse, Reetika Joshi, Bernard Gelly   +6 more
doaj   +1 more source

Solar Microwave Emission in Active Regions [PDF]

Symposium - International Astronomical Union, 1985
Multi–frequency Observations of Solar Microwave bursts recorded during solar maximum period 1980–81 are analysed and compared with x–ray data for studying the nature of microwave emissions from active regions. Most of the microwave burst spectra showed that the spectral index below the peak frequency is always less than 2.The magneto-ionic conditions ...
B. Lokanadham, P. K. Subramanian, M. Sateesh Reddy, B. M. Reddy, D. R. Lakshmi   +4 more
openaire   +1 more source

A Statistical Study on Photospheric Magnetic Nonpotentiality of Active Regions and Its Relationship with Flares during Solar Cycles 22-23

, 2012
A statistical study is carried out on the photospheric magnetic nonpotentiality in solar active regions and its relationship with associated flares. We select 2173 photospheric vector magnetograms from 1106 active regions observed by the Solar Magnetic ...
A. Antalova, A. Nindos, A.A. Pevtsov, A.A. Pevtsov, A.B. Severny, C.J. Schrijver, D.A. Falconer, D.A. Falconer, D.M. Rust, G.A. Gary, G.A. Gary, G.E. Moreton, G.X. Ai, G.X. Ai, GangHua Lin, H. Li, H.M. Wang, H.Q. Xu, H.Q. Zhang, H.Q. Zhang, HongQi Zhang, J. Guo, J. Guo, J. Guo, J. Guo, J. Hao, J. Jing, J.P. Dun, J.T. Su, J.X. Wang, Juan Guo, K.D. Leka, M. Hagino, M.J. Hagyard, M.J. Hagyard, N. Seehafer, N.C. Joshi, O.V. Chumak, O.V. Chumak, S.-H. Park, S.D. Bao, S.D. Bao, S.D. Bao, S.K. Tiwari, T. Sakurai, T.J. Wang, T.J. Wang, U. Feldman, V.I. Abramenko, Xiao Yang, Y. Nakagawa, Y.-J. Moon, Y.M. Cui, Y.M. Cui, Y.M. Cui, Y.P. Lü, Y.Y. Deng, Yu Gao   +57 more
core   +1 more source

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

Where Do Solar Storms Prefer to Originate From: Hemispheric and Longitudinal Patterns in Solar Cycles 23 and 24

The Astrophysical Journal
Using synoptic maps, we analyzed the relationship between active longitudes, the most populated longitudes of energetic flares, the distribution of magnetically complex active regions, and the preferred locations of those that produced the largest flares.
Marianna B. Korsós, Robertus Erdélyi
doaj   +1 more source

Coronal magnetograms of solar active regions [PDF]

Proceedings of the International Astronomical Union, 2004
A series of coronal magnetograms, related to the active region NOAA 9068 is derived using the effects of the quasi-transverse (QT-) propagation at microwaves. In the assumption that the product of the electron density N and the scale of magnetic divergence Ld is constant and equal to 10 18 cm −2 , the sensitivity of the measurements peaks at B(G) ≈ 180
Ryabov, B. I., Bogod, V. M., Gelfreikh, G. B., Maksimov, V. P., Drago, F., Lubyshev, B. I., Peterova, N. G., Borisevich, T. P., Bezrukov, D. A.   +8 more
openaire   +2 more sources

The Radial Distribution of Magnetic Helicity in the Solar Convective Zone: Observations and Dynamo Theory

, 2005
We continue our attempt to connect observational data on current helicity in solar active regions with solar dynamo models. In addition to our previous results about temporal and latitudinal distributions of current helicity (Kleeorin et al.
Baker, Bao, Bao, Bao, Benevolenskaya, Benevolenskaya, Blackman, Brandenburg, Brandenburg, Brandenburg, Choudhuri, Collin, Covas, Covas, D. Moss, D. Sokoloff, Galitski, Gruzinov, H. Zhang, I. Rogachevskii, K. Kuzanyan, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Krause, Kuzanyan, Kuzanyan, Kuzanyan, Longcope, Makarov, Moffatt, Moss, N. Kleeorin, Obridko, Ossendrijver, Parker, Pevtsov, Pouquet, Rogachevskii, Rogachevskii, Rüdiger, Schou, Seehafer, Spiegel, Spruit, Subramanian, Tobias, Tobias, V. Lamburt, Vishniac, Zhang, Zhang, Zhang   +54 more
core   +2 more sources

Auto‐Generated Valence States in Electrocatalysts for Boosting Oxygen and Hydrogen Evolution Kinetics in Alkaline Water/Alkaline Seawater/Simulated Seawater/Natural Seawater

Advanced Functional Materials, EarlyView.
This review systematically highlights the latest achievements in mixed‐valence states relevant to hydrogen and oxygen evolution reactions, providing essential insights into future directions and methods for large‐scale practical implementation. This critical review is expected to provide an overview of recent advancements in diverse valence‐state metal
Jitendra N. Tiwari, Gokul Bhaskaran, Krishan Kumar, Yun Suk Huh, Young‐Kyu Han   +4 more
wiley   +1 more source