Results 41 to 50 of about 30,768 (165)

Evidence For Non-Potential Magnetic Fields In The Quiet Sun [PDF]

, 2007
. A comparison of BBSO Hff centerline filtergrams and videomagnetograms was made to investigate the existence of non-potential magnetic fields in the quiet Sun near magnetic network.
M. F. Woodard, Jongchul Chae
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Electron and composite-fermion edge states in nonuniform magnetic fields [PDF]

, 2001
We investigate the electron transport in two-dimensional electron systems, where spatially nonuniform magnetic fields are applied, using the noninteracting-electron approach and composite-fermion edge state theory.
Ihm, G, Sim, Heung-Sun, Chang, Kee-Joo, Kim, N   +3 more
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Inference of magnetic fields in the very quiet Sun [PDF]

, 2016
Context. Over the past 20 yr, the quietest areas of the solar surface have revealed a weak but extremely dynamic magnetism occurring at small scales (
M. J. Martínez González, Doerr, H. P., Strassmeier, K., Verma, M., J. Staude, Kuckein, Christoph (Dr.), Schmidt, W., Schlichenmaier, R., H. Nicklas, Solanki, S. K., Hofmann, A., Waldman, T., F. Kneer, Balthasar, H., Strassmeier, Klaus G., Sigwarth, M., González Manrique, Sergio Javier, Berkefeld, T., D. Schmidt, Kuckein, C., S. J. González Manrique, T. Waldman, D. Orozco, M. Collados, R. Louis, A. Pastor Yabar, Rezaei, R., A. Asensio Ramos, C. Kuckein, A. Feller, Lagg, A., Louis, R., K. G. Strassmeier, A. Lagg, C. Denker, Volkmer, R., Denker, C., González Manrique, S., Doerr, H., R. Rezaei, Schmidt, D., S. K. Solanki, Pastor Yabar, A., Denker, Carsten (Prof. Dr.), Martinez Gonzalez, M. J., Soltau, D., H. P. Doerr, Franz, M., W. Schmidt, Martínez González, M., Kneer, F., T. Berkefeld, O. von der Lühe, Collados, M., M. Franz, R. Volkmer, Collados Vera, M., Solanki, S., Feller, A., Orozco, D., Nicklas, H., H. Balthasar, M. Verma, Verma, Meetu (Dr.), Staude, J., Asensio Ramos, A., R. Schlichenmaier, Sobotka, M., A. Hofmann, M. Sobotka, D. Soltau, Sobotka, Michal, Balthasar, Horst (Dr.), M. Sigwarth, von der Lühe, O.   +74 more
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Photospheric high-frequency acoustic power excess in sunspot umbra: signature of magneto-acoustic modes [PDF]

, 2013
We present observational evidence for the presence of MHD (magnetohydrodynamic) waves in the solar photosphere deduced from SOHO/MDI (Solar and Heliospheric Observatory/Michelson Doppler Imager) Dopplergram velocity observations.
Shelyag, S., Thompson, Michael John, Zharkov, Sergei, Zharkov, S., M. J. Thompson, Fedun, V., S. Zharkov, Shelyag, Sergiy, Erdélyi, Robert, R. Erdélyi, Erdelyi, R., S. Shelyag, V. Fedun, Fedun, Viktor, Thompson, M.J.   +14 more
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On the properties of single-separator MHS equilibria and the nature of separator reconnection [PDF]

, 2015
This thesis considers the properties of MHS equilibria formed through non-resistive MHD relaxation of analytical non-potential magnetic field models, which contain two null points connected by a generic separator. Four types of analytical magnetic fields
Stevenson, Julie E. H.
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Convectively driven sinks and magnetic fields in the quiet-Sun [PDF]

, 2017
©2017 The American Astronomical Society. All rights reserved. We study the relation between mesogranular flows, convectively driven sinks and magnetic fields using high spatial resolution spectropolarimetric data acquired with the Imaging Magnetograph ...
Toro, José Carlos del, Pillet, V., Solanki, S., Iker S. Requerey, Schmidt, W., Bellot Rubio, L., Valentín Martínez Pillet, Bellot Rubio, Luis R., Solanki, S. K., Wolfgang Schmidt, Requerey, Iker S., Jose Carlos Del Toro Iniesta, Requerey, I., Del Toro Iniesta, J., Sami K. Solanki, Luis R. Bellot Rubio, Martínez Pillet, V.   +16 more
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Stochastic entropy production in the quite Sun magnetic fields [PDF]

, 2019
The second law of thermodynamics imposes an increase of macroscopic entropy with time in an isolated system. Microscopically, however, the entropy production can be negative for a single, microscopic realization of a thermodynamic process.
Berdyugina, Svetlana V., Gorobets, Andriy Y.   +1 more
core   +1 more source

MHD simulations of coronal heating [PDF]

, 2015
The problem of heating the solar corona requires the conversion of magnetic energy into thermal energy. Presently, there are two promising mechanisms for heating the solar corona: wave heating and nanoflare heating.
Tam, Kuan V.
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Evolution of large-scale magnetic fields in the Sun [PDF]

, 2005
A scenario of evolution of the large-scale magnetic fields in the Sun is proposed. The analysed models of the Sun allow one to accept the shearing of the poloidal field by differential rotation, helical turbulence and also the advective transport of the ...
Brayko, P.G.
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Magnetic Fields of M-Dwarfs from the Molecular and Atomic Diagnostics [PDF]

, 2011
Strong surface magnetic fields are frequently found in the spectra of M-dwarfs, with the mean intensities on the order of a few thousand Gauss - three orders of magnitude higher than the mean surface magnetic field of the Sun.
Kochukhov, Oleg,, Shulyak, D., Seifahrt, A., Piskunov, Nikolai,, Reiners, A., Wende, S.   +5 more
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