Detalles de publicación
PP 07035
Search for photospheric footpoints of quiet Sun transition region loops
((1) Instituto de Astrofisica de Canarias, La Laguna, Tenerife, Spain,
(2) Max-Planck-Institut fur Sonnensystemforschung, Lindau, Germany,
(3) Sterrenkundig Instituut, Universiteit Utrecht, The Netherlands, and
(4) INAF-Osservatorio Astrofisico di Catania, Catania, Italy)
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.
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.