We present observations of the solar chromosphere obtained simultaneously with the Atacama Large Millimeter/submillimeter Array (ALMA) and the Interface Region Imaging Spectrograph (IRIS). The observatories targeted a chromospheric plage region of which the spatial distribution (split between strongly and weakly magnetized regions) allowed the study of linear-like structures in isolation, free of contamination from background emission. Using these observations in conjunction with a radiative magnetohydrodynamic 2.5D model covering the upper convection zone all the way to the corona that considers non-equilibrium ionization effects, we report the detection of an on-disk chromospheric spicule with ALMA and confirm its multithermal nature.
@article{arxiv.2005.12717,
title = {ALMA and IRIS Observations of the Solar Chromosphere I: an On-Disk Type II Spicule},
author = {Georgios Chintzoglou and Bart De Pontieu and Juan Martínez-Sykora and Viggo Hansteen and Jaime de la Cruz Rodríguez and Mikolaj Szydlarski and Shahin Jafarzadeh and Sven Wedemeyer and Timothy S. Bastian and Alberto Saínz Dalda},
journal= {arXiv preprint arXiv:2005.12717},
year = {2021}
}
Comments
29 pages, 9 figures, Accepted for publication in the Astrophysical Journal. This version replaces the previous submission, which is now split into two companion papers