Search for photospheric footpoints of quiet Sun transition region loops

Abstract

CONTEXT:The footpoints of quiet Sun Transition Region (TR) loops do not seem to coincide with the photospheric magnetic structures appearing in traditional low-sensitivity magnetograms. AIMS: To look for the so-far unidentified photospheric footpoints of TR loops using G-band bright points (BPs) as proxies for photospheric magnetic field concentrations. METHODS: Comparison of TR measurements with SoHO/SUMER and photospheric magnetic field observations obtained with the Dutch Open Telescope. RESULTS: Photospheric BPs are associated with bright TR structures, but they seem to avoid the brightest parts of the structure. BPs appear in regions that are globally redshifted, but they avoid extreme velocities. TR explosive events are not clearly associated with BPs. CONCLUSIONS: The observations are not inconsistent with the BPs being footpoints of TR loops, although we have not succeeded to uniquely identify particular BPs with specific TR loops.

arXiv commentAccepted for publication in A&A. 10 pages, 10 figures. Due to size limitations, the quality of fig3 is not good

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Cited by in corpus (10)

• The Unresolved Fine Structure Resolved - IRIS observations of the Solar Transition Region
• What is the Nature of EUV Waves? First STEREO 3D Observations and Comparison with Theoretical Models
• Hinode Observations of Magnetic Elements in Internetwork Areas
• Magnetic bright points in the quiet Sun
• Imaging Spectropolarimetry with IBIS II: on the fine structure of G-band bright features
• Temperature of Solar Orbiter/EUI quiet Sun small scale brightenings: evidence for a cooler component
• Explosive Events and the Evolution of the Photospheric Magnetic Field
• Fleeting Small-scale Surface Magnetic Fields Build the Quiet-Sun Corona
• Spectroscopic evidence of cool plasma in quiet Sun HRIEUV small scale brightenings
• Center-to-limb variation of the area covered by magnetic bright points in the quiet Sun