Generation of Solar Spicules and Subsequent Atmospheric Heating

Abstract

Spicules are rapidly evolving fine-scale jets of magnetized plasma in the solar chromosphere. It remains unclear how these prevalent jets originate from the solar surface and what role they play in heating the solar atmosphere. Using the Goode Solar Telescope at the Big Bear Solar Observatory, we observed spicules emerging within minutes of the appearance of opposite-polarity magnetic flux around dominant-polarity magnetic field concentrations. Data from the Solar Dynamics Observatory showed subsequent heating of the adjacent corona. The dynamic interaction of magnetic fields (likely due to magnetic reconnection) in the partially ionized lower solar atmosphere appears to generate these spicules and heat the upper solar atmosphere.

Published in Science, File includes the main text and supplementary materials

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• Direct Observation of A Large-scale CME Flux Rope Event Arising from an Unwinding Coronal Jet
• Heating at the remote footpoints as a brake on jet flows along loops in the solar atmosphere
• Identifying and Tracking Solar Magnetic Flux Elements with Deep Learning
• Rapid Evolution of Type II Spicules Observed in Goode Solar Telescope On-Disk H-alpha Images
• Analysis of quiet-sun turbulence on the basis of SDO/HMI and Goode Solar Telescope data
• Spicule jets in the solar atmosphere modeled with resistive MHD and thermal conduction
• Accelerating and Supersonic Density Fluctuations in Coronal Hole Plumes: Signature of Nascent Solar Winds
• Magnetic Flux Emergence in a Coronal Hole