Main Objective: Our aim is to understand the energy build-up and release process in jets at the base of plumes.
Scientific Justification: Coronal plumes are long, ray-like, open structures, which have been considered as possible sources for the solar wind. Their origin in the largely unipolar coronal holes has long been a mystery. Earlier spectroscopic and imaging observations revealed blue-shifted plasma and propagating disturbances (PDs) in plumes that are widely interpreted in terms of flows and/or propagating slow-mode waves, but these interpretations (flows vs waves) remain under debate.
Recent studies (e.g., Kumar et al. 2022) have revealed numerous, quasiperiodic (P~5 min), tiny jets (so-called jetlets) associated with transient brightening, flows, and plasma heating at the chromospheric footpoints of the plumes. Our aim to observe the base of the plumes using high-resolution BBSO/GST, IRIS and Hinode SOT, EIS observations simultaneously. |
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