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Author Chesny, D. L. ♦ Oluseyi, H. M. ♦ Orange, N. B. ♦ Champey, P. R.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ CONCENTRATION RATIO ♦ EXTREME ULTRAVIOLET RADIATION ♦ FINE STRUCTURE ♦ HELICITY ♦ HELIOSPHERE ♦ JETS ♦ LAYERS ♦ MAGNETIC FIELDS ♦ MAGNETIC FLUX ♦ MAGNETIC RECONNECTION ♦ MASS ♦ SOLAR CORONA ♦ SUN ♦ TOPOLOGY
Abstract 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 quiet-Sun (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 and micro-sigmoids, the sigmoidal arcade is likely formed via tether-cutting reconnection and precedes peak intensity enhancements and eruptive activity. Our QS BP sigmoid provides a new class of small-scale structuring exhibiting self-organized criticality that highlights a multi-scaled self-similarity between large-scale, high-temperature coronal fields and the small-scale, lower-temperature QS network. Finally, our QS BP sigmoid elevates arguments for coronal heating contributions from cooler atmospheric layers, as this class of structure may provide evidence favoring mass, energy, and helicity injections into the heliosphere.
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-12-01
Publisher Place United States
Journal Astrophysical Journal
Volume Number 814
Issue Number 2


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