Search Results - "Gudiksen, B."

NON-EQUILIBRIUM IONIZATION EFFECTS ON THE DENSITY LINE RATIO DIAGNOSTICS OF O IV by Olluri, K, Gudiksen, B V, Hansteen, V H

“…The dynamic timescales in the solar atmosphere are shorter than the ionization and recombination times of many ions used for line ratio diagnostics of the…”
Get full text

A comprehensive three-dimensional radiative magnetohydrodynamic simulation of a solar flare by Cheung, M. C. M., Rempel, M., Chintzoglou, G., Chen, F., Testa, P., Martínez-Sykora, J., Sainz Dalda, A., DeRosa, M. L., Malanushenko, A., Hansteen, V., De Pontieu, B., Carlsson, M., Gudiksen, B., McIntosh, S. W.

“…Solar and stellar flares are the most intense emitters of X-rays and extreme ultraviolet radiation in planetary systems 1 , 2 . On the Sun, strong flares are…”
Get full text

Structures in the Outer Solar Atmosphere by Fletcher, L., Cargill, P. J., Antiochos, S. K., Gudiksen, B. V.

“…The structure and dynamics of the outer solar atmosphere are reviewed with emphasis on the role played by the magnetic field. Contemporary observations that…”
Get full text

An Ab Initio Approach to the Solar Coronal Heating Problem by Gudiksen, Boris Vilhelm, Nordlund, Åke

“…We present an ab initio approach to the solar coronal heating problem by modeling a small part of the solar corona in a computational box using a…”
Get full text

An Ab Initio Approach to Solar Coronal Loops by Gudiksen, Boris Vilhelm, Nordlund, Åke

“…Data from recent numerical simulations of the solar corona and transition region are analyzed, and the magnetic field connections between the low corona and…”
Get full text

Forward Modeling of the Corona of the Sun and Solar-like Stars: From a Three-dimensional Magnetohydrodynamic Model to Synthetic Extreme-Ultraviolet Spectra by Peter, Hardi, Gudiksen, Boris V, Nordlund, Åke

“…A forward model is described in which we synthesize spectra from an ab initio three-dimensional MHD simulation of an outer stellar atmosphere, where the…”
Get full text

On the nature of coronal loops above the quiet sun network by Bingert, S., Zacharias, P., Peter, H., Gudiksen, B.V.

“…The structure and dynamics of a box in a stellar corona can be modeled employing a 3D MHD model for different levels of magnetic activity. Depending on the…”
Get full text

Dark cores in sunspot penumbral filaments by Kiselman, Dan, Scharmer, Göran B, Gudiksen, Boris V, Löfdahl, Mats G, van der Voort, Luc H. M. Rouppe

“…Sunspot umbrae-the dark central regions of the spots-are surrounded by brighter filamentary penumbrae, the existence of which remains largely inexplicable. The…”
Get full text

Accelerated particle beams in a 3D simulation of the quiet Sun by Frogner, L, Gudiksen, B. V, Bakke, H

“…A&A 643, A27 (2020) Observational and theoretical evidence suggest that beams of accelerated particles are produced in flaring events of all sizes in the solar…”
Get full text

Accelerated particle beams in a 3D simulation of the quiet Sun. Lower atmospheric spectral diagnostics by Bakke, H, Frogner, L, van der Voort, L. Rouppe, Gudiksen, B. V, Carlsson, M

“…A&A 675, A103 (2023) Nanoflare heating through small-scale magnetic reconnection events is one of the prime candidates to explain heating of the solar corona…”
Get full text

Chromospheric emission from nanoflare heating in RADYN simulations by Bakke, H, Carlsson, M, van der Voort, L. Rouppe, Gudiksen, B. V, Polito, V, Testa, P, De Pontieu, B

“…A&A 659, A186 (2022) Heating signatures from small-scale magnetic reconnection events in the solar atmosphere have proven to be difficult to detect through…”
Get full text

NON-EQUILIBRIUM IONIZATION EFFECTS ON THE DENSITY LINE RATIO DIAGNOSTICS OF O IV by Olluri, K., Gudiksen, B. V., Hansteen, V. H.

Get full text

Disentangling flows in the solar transition region by Zacharias, P, Hansteen, V. H, Leenaarts, J, Carlsson, M, Gudiksen, B. V

“…The measured average velocities in solar and stellar spectral lines formed at transition region temperatures have been difficult to interpret. However,…”
Get full text

SYNTHESIZED SPECTRA OF OPTICALLY THIN EMISSION LINES PRODUCED BY THE BIFROST STELLAR ATMOSPHERE CODE, INCLUDING NONEQUILIBRIUM IONIZATION EFFECTS: A STUDY OF THE INTENSITY, NONTHERMAL LINE WIDTHS, AND DOPPLER SHIFTS by Olluri, K., Gudiksen, B. V., Hansteen, V. H., Pontieu, B. De

“…ABSTRACT In recent years realistic 3D numerical models of the solar atmosphere have become available. The models attempt to recreate the solar atmosphere and…”
Get full text

Accelerated particle beams in a 3D simulation of the quiet Sun. Effects of advanced beam propagation modelling by Frogner, L, Gudiksen, B. V

“…Charged particles are constantly accelerated to non-thermal energies by the reconnecting magnetic field in the solar atmosphere. Our understanding of the…”
Get full text

Implementing accelerated particle beams in a 3D simulation of the quiet Sun by Frogner, L, Gudiksen, B. V

“…Context. The magnetic field in the solar atmosphere continually reconnects and accelerates charged particles to high energies. Simulations of the atmosphere in…”
Get full text

Coronal dynamics and heating theories by Gudiksen, Boris V.

“…A large number of coronal heating theories have been proposed and most of them can be labeled as AC or DC heating theories. Here a short description of these…”
Get full text

Radiative transfer with scattering for domain-decomposed 3D MHD simulations of cool stellar atmospheres by Hayek, W, Asplund, M, Carlsson, M, Trampedach, R, Collet, R, Gudiksen, B. V, Hansteen, V. H, Leenaarts, J

“…We present the implementation of a radiative transfer solver with coherent scattering in the new BIFROST code for radiative magneto-hydrodynamical (MHD)…”
Get full text

Bulk Heating and Slender Magnetic Loops in the Solar Corona by Gudiksen, Boris Vilhelm, Nordlund, Åke

Get full text

Coronal Heating through Braiding of Magnetic Field Lines by Peter, Hardi, Gudiksen, Boris V, Nordlund, Åke

Get full text