RESULTS FROM 2-DIMENSIONAL SPECTROSCOPIC OBSERVATIONS OF SOLAR GRANULATION WITH A FABRY-PEROT-INTERFEROMETER

With the two-dimensional spectrometer mounted in the Vacuum Tower Tele scope at the Observatorio del Teide/Tenerife, solar granulation was ob served in a moderately active region near disk centre. Time series of white-light pictures and narrow-band images in the Fe I 6303 line were taken strictly simultaneously. Scanning through the line was accompli shed by tuning a Fabry-Perot Interferometer (FPI) to different wavelen gths. As the corresponding full width at half maximum of the FPI passb and is only 22 mangstrom, the narrow-band filtergrams were used to obt ain line profiles for a two-dimensional field of view from which physi cal information was extracted. The evaluation of the time series prese nted here was aimed at studying the dynamics of solar granulation. In particular, the investigation of velocity fields in areas with enhance d magnetic flux density and of granules penetrating into high atmosphe ric layers led to new results.