Bonn 2010 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 15: Sun I

EP 15.1: Vortrag

Donnerstag, 18. März 2010, 17:00–17:15, AKM

Asymmetric flows in the solar corona — •Hardi Peter — Max-Planck-institut für Sonnensystemkroschung, 37191 Katlenburg-Lindau

The solar corona and the transition region from the chromosphere to the corona are highly dynamic regions. Previous EUV spectra from the transition regions using SUMER/SoHO showed asymmetric line profiles pointing to flows and/or wave broadening in structures intermixed along the line of sight. New observations of hot coronal plasma with EIS/Hinode now reveal the existence of such asymmetries also in hot active regions.

A new combined interpretation of the asymmetric EUV spectra from the transition region and hot corona will be given that will account for the feeding of plasma into the corona, either filling active region loop systems or supplying mass to the solar wind.

Evidence is presented that the actual mass supply to the corona and the find happens in the mid transition region, thus supporting previous studies of the connection of the chromospheric network to the origin of the solar wind.

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