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The formation of IRIS diagnostics VIII. IRIS observations in the C II 133.5 nm multiplet
Bhavna Rathore, Tiago M. D. Pereira, Mats Carlsson +1
The C II 133.5 nm multiplet has been observed by NASA's Interface Region Imaging Spectrograph (IRIS) in unprecedented spatial resolution. The aims of this work are to characterize…
On the temporal evolution of spicules observed with IRIS, SDO and Hinode
H. Skogsrud, L. Rouppe van der Voort, B. De Pontieu +1
Spicules are ubiquitous, fast moving jets observed off-limb in chromospheric spectral lines. Combining the recently-launched Interface Region Imaging Spectrograph with the Solar Dy…
The multi-thermal and multi-stranded nature of coronal rain
P. Antolin, G. Vissers, T. M. D. Pereira +2
In this work, we analyse coordinated observations spanning chromospheric, TR and coronal temperatures at very high resolution which reveal essential characteristics of thermally un…
The Formation of IRIS diagnostics. IV. The Mg II triplet lines as a new diagnostic for lower chromospheric heating
Tiago M. D. Pereira, Mats Carlsson, Bart De Pontieu +1
A triplet of subordinate lines of Mg II exists in the region around the h&k lines. In solar spectra these lines are seen mostly in absorption, but in some cases can become emission…
Internetwork chromospheric bright grains observed with IRIS
Juan Martínez-Sykora, Luc Rouppe van der Voort, Mats Carlsson +18
The Interface Region Imaging Spectrograph (IRIS) reveals small-scale rapid brightenings in the form of bright grains all over coronal holes and the quiet sun. These bright grains a…