Speaker
Description
First Name: Jeongwoo
Last Name: Lee
Affiliation: New Jersey Institute of Technology
All Authors: Jeongwoo Lee, Nengyi Huang, Haimin Wang
Abstract: We report two jets that occurred on 2022-10-29 around 19:08 UT and 19:13 UT captured by the Extreme Ultraviolet Imager’s High Resolution Imager (EUI-HRI) in Solar Orbiter (SolO) and the Visible Imaging Spectrometer (VIS) of the 1.6 m, high-order adaptive optics (AO) equipped Goode Solar Telescope (GST) at the Big Bear Solar Observatory (BBSO). The Interface Region Imaging Spectrograph (IRIS) provides complementary UV spectral data for diagnosing plasma and Doppler motions in the transition region. The two observed jets share a common setting of linear H-alpha spicules but display distinct characteristics. The first EUV jet appears in a striking helical morphology, and the associated strong H-alpha red-shift implies a bidirectional outflow. In contrast, the second jet has a simpler EUV structure and lacks the underlying redshifted H-alpha emission. Both jets are, however, enveloped by H-alpha spicules that exhibit a linear morphology. We triangulate the jets' motion in three dimensions by synthesizing Doppler measurements from the differing perspectives of SPICE and IRIS. High-resolution BBSO/NIRIS magnetograms revealed a small parasitic polarity patch emerging into the photosphere as the jetting began, suggesting a highly localized event of impulsive interchange reconnection. We compare the morphology and energetics of these jets with other small-scale jets previously detected by the EUI/HRI instrument, specifically the poco jets (Chitta et al. 2023) and the helical jet (Petrova et al. 2024). We found that all three jet types exhibit comparable spatial scales, lifetimes, velocities, and morphology, and that they could all be manifestations of propagating torsional Alfvén waves within the low coronal structure.