SIGNATURE OF CURRENT SHEETS AS SEEN BY TIP AT VTT IN THE HeI MULTIPLET AT 1083.0 nm

摘要

We report infrared spectropolarimetric observationsrnobtained with the Tenerife Infrared Polarimeter (TIP) atrnthe German Vacuum Tower Telescope (VTT) of thernSpanish observatory of Iza?a, Tenerife. Thernobservations taken in the chromospheric He I 1083.0rnnm multiplet were used to create maps in the Stokesrnparameters I, Q, U and V. A number of active regionsrnhave been scanned. A technique to invert Stokesrnprofiles of the He I 1083.0 nm multiplet lines wasrnapplied in order to obtain the full magnetic vector andrnthe line-of-sight velocity. Here initial results arernpresented. Evidence for electric current sheetsrnseparating regions of opposite polarities has been foundrnin at least 3 active regions. Rapid flows with line-ofsightrnvelocities of the order of 30-50 km s-1 turn out tornquite common and are generally found in severalrnlocations of most observed active regions.