89 citations · 236 across the 6 of their papers we have counts for
6 papers
Rapid Blue- and Red-shifted Excursions in H line profiles synthesized from realistic 3D MHD simulations
S. Danilovic, J. P. Bjørgen, J. Leenaarts +1
Rapid blue- and red-shifted events (RBEs/RREs) may have an important role in mass-loading and heating the solar corona, but their nature and origin are still debatable. We aim to m…
Line formation of He I D3 and He I 10830 Å in a small-scale reconnection event
T. Libbrecht, J. P. Bjørgen, J. Leenaarts +3
Aims. We aim to explain line formation of He I D3 and He I 10830 Å in small-scale reconnection events. Methods. We make use of a simulated Ellerman bomb (EB), present in a Bifrost-…
Three-dimensional modeling of chromospheric spectral lines in a simulated active region
Johan P. Bjørgen, Jorrit Leenaarts, Matthias Rempel +4
Because of the complex physics that governs the formation of chromospheric lines, interpretation of solar chromospheric observations is difficult. The origin and characteristics of…
Ellerman bombs and UV bursts: transient events in chromospheric current sheets
V. Hansteen, A. Ortiz, V. Archontis +3
Ellerman bombs (EBs) and UV bursts are both brightenings related to flux emergence regions and specifically to magnetic flux of opposite polarity that meet in the photosphere. Thes…
Three-dimensional modeling of the Ca II H&K lines in the solar atmosphere
Johan P. Bjørgen, Andrii V. Sukhorukov, Jorrit Leenaarts +4
CHROMIS, a new imaging spectrometer at the Swedish 1-m Solar Telescope (SST), can observe the chromosphere in the H and K lines of Ca II at high spatial and spectral resolution. Ac…
Numerical non-LTE 3D radiative transfer using a multigrid method
Johan P. Bjørgen, Jorrit Leenaarts
3D non-LTE radiative transfer problems are computationally demanding, and this sets limits on the size of the problems that can be solved. So far Multilevel Accelerated Lambda Iter…