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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…
On chromospheric heating during flux emergence in the solar atmosphere
Jorrit Leenaarts, Jaime de la Cruz Rodríguez, Sanja Danilovic +2
Context. The radiative losses in the solar chromosphere vary from 4~kW~m in the quiet Sun, to 20~kW~m in active regions. The mechanisms that transport non-thermal ene…
The chromosphere above a -sunspot in the presence of fan-shaped jets
Carolina Robustini, Jorrit Leenaarts, Jaime de la Cruz Rodríguez
-sunspots are known to be favourable locations for fast and energetic events like flares and CMEs. The photosphere of this type of sunspots has been thoroughly investigated in t…
Comparison of Solar Fine Structure Observed Simultaneously in Ly-α and Mg II h
D. J. Schmit, A. V. Sukhorukov, B. De Pontieu +9
The Chromospheric Lyman Alpha Spectropolarimeter (CLASP) observed the Sun in H I Lyman-α during a suborbital rocket flight on September 3, 2015. The Interface Region Imaging Telesc…
The Formation of IRIS Diagnostics. IX. The Formation of the C I 135.58 Line in the Solar Atmosphere
Hsiao-Hsuan Lin, Mats Carlsson, Jorrit Leenaarts
The C I 135.58 line is located in the wavelength range of NASA's Interface Region Imagin Spectrograph (IRIS) small explorer mission. We here study the formation and diagnostic pote…
A First Comparison of Millimeter Continuum and Mg II Ultraviolet Line Emission from the Solar Chromosphere
T. S. Bastian, G. Chintzoglou, B. De Pontieu +4
We present joint observations of the Sun by the Atacama Large Millimeter/submillimeter Array (ALMA) and the Interface Region Imaging Spectrograph (IRIS). The observations were made…