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Full-Text Articles in Physical Sciences and Mathematics
Quiet-Sun Network Bright Point Phenomena With Sigmoidal Signatures, David L. Chesney, Hakeem M. Oluşeyi, Norton Brice Orange, Patrick R. Champey
Quiet-Sun Network Bright Point Phenomena With Sigmoidal Signatures, David L. Chesney, Hakeem M. Oluşeyi, Norton Brice Orange, Patrick R. Champey
Aerospace, Physics, and Space Science Faculty Publications
Ubiquitous solar atmospheric coronal and transition region bright points (BPs) are compact features overlying strong concentrations of magnetic flux. Here, we utilize high-cadence observations from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory to provide the first observations of extreme ultraviolet quietSun (QS) network BP activity associated with sigmoidal structuring. To our knowledge, this previously unresolved fine structure has never been associated with such small-scale QS events. This QS event precedes a bi-directional jet in a compact, low-energy, and low-temperature environment, where evidence is found in support of the typical fan-spine magnetic field topology. As in active regions …
Observations Of An Energetically Isolated Quiet Sun Transient: Evidence Of Quasi-Steady Coronal Heating, Norton Brice Orange, David L. Chesney, Hakeem M. Oluseyi
Observations Of An Energetically Isolated Quiet Sun Transient: Evidence Of Quasi-Steady Coronal Heating, Norton Brice Orange, David L. Chesney, Hakeem M. Oluseyi
Aerospace, Physics, and Space Science Faculty Publications
Increasing evidence for coronal heating contributions from cooler solar atmospheric layers, notably quiet Sun (QS) conditions, challenges standard solar atmospheric descriptions of bright transition region (TR) emission. As such, questions about the role of dynamic QS transients in contributing to the total coronal energy budget are raised. Using observations from the Atmospheric Imaging Assembly and Heliosemic Magnetic Imager on board the Solar Dynamics Observatory, and numerical model extrapolations of coronal magnetic fields, we investigate a dynamic QS transient that is energetically isolated to the TR and extrudes from a common footpoint shared with two heated loop arcades. A non-causal relationship …