Results 81 to 90 of about 28,168 (221)

Solar photospheric spectrum microvariability

8 pages, 3 figures. To appear in Proceedings of IAU Symposium 400 (Solar and Stellar Multi-scale Activity; Medell\'in, July 2025), Cambridge University ...
Dravins, Dainis, Ludwig, Hans-Günter
openaire   +2 more sources

Dynamical effects in solar photospheric flux tubes [PDF]

Astrophysics and Space Science, 1996
AbstractThe interaction of an intense flux tube, extending vertically through the photosphere, with p-modes in the ambient medium is modelled by solving the time dependent MHD equations in the thin flux tube approximation. It is found that a resonant interaction can occur, which leads to the excitation of flux tube oscillations with large amplitudes ...
openaire   +1 more source

Exploring Solar Granulation: from IMaX/SUNRISE to DKIST

Proceedings of the International Florida Artificial Intelligence Research Society Conference
Granules are small cellular structures that populate the solar photosphere and are formed by the dynamic behavior of convection cells. This constant motion generates an evolving pattern of diverse granule types and intergranular regions across the ...
Reza Mansouri, Rafal Angryk, Kevin Reardon   +2 more
doaj   +1 more source

The solar flare environment [PDF]

Solar flare environment - solar atmosphere, photosphere, chromosphere, corona, and solar flare types, model, occurence, prediction, and ...
Roberts, W. T.
core   +1 more source

A Substantial Amount of Hidden Magnetic Energy in the Quiet Sun

, 2004
Deciphering and understanding the small-scale magnetic activity of the quiet solar photosphere should help to solve many of the key problems of solar and stellar physics, such as the magnetic coupling to the outer atmosphere and the coronal heating.
A Gandorfer, A. Asensio Ramos, CJ Schrijver, CJ Schrijver, E Khomenko, E Landi Degl'Innocenti, E Landi Degl'Innocenti, E Priest, F Cattaneo, H Lin, H Socas-Navarro, I Domínguez Cerdeña, J Sánchez Almeida, J Sánchez Almeida, J Trujillo Bueno, J Trujillo Bueno, J Trujillo Bueno, J Trujillo Bueno, J Trujillo Bueno, J. Trujillo Bueno, JO Stenflo, JO Stenflo, JO Stenflo, JO Stenflo, LS Anderson, M Asplund, M Faurobert, M Faurobert-Scholl, N Shchukina, N. Shchukina, RF Stein, V Bommier, W Hanle   +32 more
core   +1 more source

Analysis of Solar Surface Oscillations and Energy Transport with Bispectral Electronic Thermostatistics

The Astrophysical Journal
The ubiquitous 5 minute solar p -mode oscillations, excited at the photosphere, play a crucial role in driving various coronal instabilities and mediating upward energy transport. These modes are strongly influenced by nonthermal electron populations. To
Souvik Das, Pralay Kumar Karmakar
doaj   +1 more source

The polarization signature of photospheric magnetic fields in 3D MHD simulations and observations at disk center

, 2017
Before using 3D MHD simulations of the solar photosphere in the determination of elemental abundances, one has to ensure that the correct amount of magnetic flux is present in the simulations.
Beck, C., Fabbian, D., Puschmann, K. G., Rezaei, R.   +3 more
core   +1 more source

Structure and Dynamics of the Sun's Open Magnetic Field

, 2007
The solar magnetic field is the primary agent that drives solar activity and couples the Sun to the Heliosphere. Although the details of this coupling depend on the quantitative properties of the field, many important aspects of the corona - solar wind ...
Antiochos S. K., C. R. DeVore, Cowley S. W. H., Greene J. M., Howard R. A., Hundhausen A. J., J. T. Karpen, Lin R. P., McComas D. J., McComas D. J., Parker E. N., S. K. Antiochos, Solanki S. K., Stern D. P., Titov V. S., Tousey R., Wu S.-T., Z. Mikić, Zirker J. B.   +18 more
core   +1 more source

Vortices in the solar photosphere

, 2012
Using numerical simulations of the magnetised solar photosphere and radiative diagnostics of the simulated photospheric models, we further analyse the physical nature of magnetic photospheric intergranular vortices. We confirm the magnetic nature of the vortices and find that most MHD Umov-Poynting flux is produced by horizontal vortex motions in the ...
Shelyag, S., Fedun, V., Erdélyi, R., Keenan, F. P., Mathioudakis, M.   +4 more
openaire   +2 more sources

Origin of Line Broadening in Fading Granules: Influence of Small-scale Turbulence

The Astrophysical Journal
In the quiet region of the solar photosphere, turbulent convective motions of the granular flows naturally drive the subgranular-scale flows. However, evaluating such small-scale velocities is challenging because of the limited instrumental resolution ...
Ryohtaroh T. Ishikawa, Yukio Katsukawa
doaj   +1 more source