Using multi-wavelength observations to investigate the nature of high-frequency oscillations associated with short-lived spicule-type events.

Solar chromosphere consists of a plethora of events with different morphologies. We focus on jets that are known as spicules, and investigate their unique observational characteristics. Our study looks into their appearance across the solar atmosphere and focus on high-resolution spectroscopic and imaging observations of spicule-type events, from CRisp Imaging Spec- troPolarimeter (CRISP) instrument, Interface Region Imaging Spectrograph (IRIS) and Solar Dynamics Observatory (SDO). We look into the appearance of these structures across different atmospheric heights. In addition, spicule-type events serve as waveguides for several types of magneto hydrodynamic (MHD) oscillations, that can transport energy from the lower to upper layers of the Sun. We provide examples of high-frequency waves associated with spicule-type events. These high-frequency oscillations have two components of transverse motions: the plane of sky (POS) motion and the line-of-sight (LOS) motion. We use moment analysis to find the relation between the two orthogonal motions. The composition of these two motions suggests that the wave has a helical structure. The oscillations do not have phase differences between points along the structure. This may be the result of the oscillation being a standing mode, or that propagation is mostly in the perpendicular direction. There is evidence of fast magnetoacoustic wave fronts propagating across these structures. We show that the compression and rarefaction of passing magnetoacoustic waves may influence the appearance of spicule-type events, not only by contributing to moving them in and out of the wing of the spectral line, but also through the creation of density enhancements and an increase in opacity in the H line.