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The quiet solar atmosphere observed and simulated in NaD1
J. Leenaarts, R. J. Rutten, K. Reardon +2
The NaD1 line in the solar spectrum is sometimes attributed to the solar chromosphere. We study its formation in quiet-Sun network and internetwork. We first present high-resolutio…
On-disk counterparts of type II spicules in the Ca II 854.2 nm and Halpha lines
L. Rouppe van der Voort, J. Leenaarts, B. de Pontieu +2
Recently a second type of spicules was discovered at the solar limb with the Solar Optical Telescope (SOT) onboard the Japanese Hinode spacecraft. These previously unrecognized typ…
Three-dimensional non-LTE radiative transfer computation of the Ca 8542 infrared line from a radiation-MHD simulation
J. Leenaarts, M. Carlsson, V. Hansteen +1
Interpretation of imagery of the solar chromosphere in the widely used \CaIIIR infrared line is hampered by its complex, three-dimensional and non-LTE formation. Forward modelling…