Results 81 to 90 of about 14,551 (173)

Flow and magnetic field properties in the trailing sunspots of active region NOAA 12396 [PDF]

, 2016
Improved measurements of the photospheric and chromospheric three-dimensional magnetic and flow fields are crucial for a precise determination of the origin and evolution of active regions.
Schmidt, D., Böhm, F., Gonzalez, N. Bello, Strassmeier, K., Denker, Carsten (Prof. Dr.), Verma, M., Kuckein, Christoph (Dr.), Diercke, A., Schmidt, W., Soltau, D., Hofmann, Albrecht W., Schlichenmaier, R., Boehm, F., Solanki, S. K., Pator Yabar, A., Solanki, Parth K., Hofmann, A., Balthasar, H., Strassmeier, Klaus G., Sigwarth, M., Berkefeld, T., Kuckein, C., Collados, M., Strassmeier, K. G., Collados Vera, M., Feller, A., Orozco Suárez, D., Solanki, S., Nicklas, H., Fischer, C. E., Gonzalez Manrique, Sergio Javier, Rezaei, R., Verma, Meetu (Dr.), Staude, J., Manrique, S. J. Gonzalez, Lagg, A., Sobotka, M., Diercke, Andrea (Dr.), Bello González, N., Sobotka, Michal, Volkmer, R., Waldmann, T., Fischer, C., Denker, C., González Manrique, S., Balthasar, Horst (Dr.), von der Lühe, O.   +46 more
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Chromospheric models of solar analogues with different activity levels [PDF]

, 2005
We computed chromospheric models of the Sun as a star and of nine solar analogues. The atmospheric models were constructed to obtain the best possible match with the Ca II K and Hβ lines, including the asymmetry of the lines due to macroscopic ...
P. Mauas, M. Vieytes, C. Cincunegui
core   +1 more source

Quantifying finite range plasma turbulence [PDF]

Turbulence is a highly non-linear process ubiquitous in Nature. The nonlinearity is responsible for the coupling of many degrees of freedom leading to an unpredictable dynamical evolution of a turbulent system.
Leonardis, Ersilia
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Observations and 3D MHD simulations of a solar active region jet [PDF]

, 2009
Aims. We study an active region jet originating from NOAA 8531 on May 15 1999. We perform 3D MHD numerical simulations of magnetic flux emergence and its subsequent reconnection with preexisting magnetic flux.
Gontikakis, C., Archontis, V., Tsinganos, K.   +2 more
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Center-limb dependence of photospheric velocities in regions of emerging magnetic fields on the Sun [PDF]

, 2011
Aims. We investigate the ratio of the vertical and horizontal velocities of the photospheric plasma flows in the region of emerging magnetic fields on the Sun. Methods.
A. Khlystova
core   +1 more source

Multitechnique studies of ionospheric phenomena [PDF]

, 2010
Not ...
Bagiya, Mala S.
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The Role of Velocity Redistribution in Enhancing the Intensity of the He II 304 A Line in the Quiet Sun Spectrum [PDF]

, 1999
We present observational evidence of the effect of small scale ("microturbulent") velocities in enhancing the intensity of the He II lambda304 line with respect to other transition region emission lines, a process we call "velocity redistribution".
Thompson, William T., Davila, Joseph M., Brosius, Jeffrey W., Andretta, Vincenzo, Garcia, Adriana, Thomas, Roger J., Behring, William E., Jordan, Stuart D.   +7 more
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The dynamic evolution of active-region-scale magnetic flux tubes in the turbulent solar convective envelope [PDF]

, 2014
2014 Summer.The Sun exhibits cyclic properties of its large-scale magnetic field on the order of ~22 years, with a ~11 year frequency of sunspot occurrence.
Schubert, Wayne, committee member, Krueger, David, advisor, Fan, Yuhong, advisor, Culver, Roger, committee member, Weber, Maria Ann, author   +4 more
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Origin and Evolution of Large-scale Magnetic Fields [PDF]

, 2015
Magnetic elds are ubiquitous at all scales in the Universe and have been observed in galaxies and clusters of galaxies via observations of di use radio emission and Faraday Rotation Measures.
Barnes, DJ
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The nature and origin of disky elliptical galaxies [PDF]

, 2002
The observational trend that disky elliptical galaxies exhibit younger luminosity- weighted ages than boxy ellipticals is investigated. The presence of a possible young stellar disk embedded in these galaxies is explored by comparing kinematics derived ...
McDermid, Richard Morgan
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