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EP: Fachverband Extraterrestrische Physik

EP 8: Sun II

EP 8.3: Talk

Wednesday, April 1, 2009, 11:55–12:10, Zahnklinik

Small-scale transition region loops in the network — •Hardi Peter and Sven Bingert — Kiepenheuer-Institut für Sonnenphysik, Freiburg

Observations of the transition region with SUMER often show small loop-like features of only a few Mm length above the chromospheric magnetic network. These have often been interpreted as following short magnetic field lines emerging and closing back within small patches of network. However, previous studies have not been able to find any magnetic connection to the underlying chromospheric structure. We will re-investigate these previous observations, adding new observational material, and study the relation of the small transition region loops to the photospheric magnetic field. Comparisons to 3D numerical simulations are used to test the hypothesis that the small transition region loop seen in emission do not follow the magnetic field.