Main Objective: The magnetism and dynamics of spicules
Scientific Justification: Spicules may play an important role in the heating of the corona and in powering the solar wind (De Pontieu et al. 2007, 2017). Currently, the dynamics of these structures is well-known (e.g., Rouppe van der Voort et al. 2009, Pereira et al. 2012), and the MHD simulations have shown substantial advances in understanding their origin (e.g., Mart'inez-Sykora et al. 2017). However, the magnetic structure inside spicules is still poorly understood (e.g., Trujillo Bueno et al. 2005, Orozco Suarez et al. 2015). Due to projection effects, the counterpart of spicules on-disk is still under debate (Rouppe van der Voort et al., 2015). The lack of information of the magnetism inspicules is mainly because the high observational requirements needed to study these phenomena. The fast new cameras installed in the 1.5 m GREGOR telescope (GRIS+) overcome these difficulties, opening a new generation of studies of the magnetic structure of solar spicules. GRIS+ will for the first time allow for diffraction limited spectro-polarimetric observations in the He 10830 line with unprecedented signal-to-noise ratio and therefore complement the IRIS and Hinode spicule observations ideally. |
|