High-resolution observations of prominence plume formation with the new vacuum solar telescope

Prominence plumes are evacuated upflows that emerge from bubbles below prominences, whose formation mechanism is still unclear. Here we present a detailed study of in quiescent prominence using the high-resolution Hα filtergrams at line center as well wing ± 0.4 Å New Vacuum Solar Telescope. Enhancements brightening, blue shifts, and turbulence fronts found during their formation. Some large split heads finger-shaped structures formed between them. Blue-shifted flows along bubble-prominence interface before plume Our observations consistent with hypothesis related to coupled Kelvin-Helmholtz Rayleigh-Taylor (KH/RT) instabilities. Plume splittings fingers evidence RT instability, may increase growth rate KH/RT However, significant suggest instability triggered by penetrating into prominence. In this scenario, extra mechanisms necessary drive plumes.