Prospects for an orbital determination and capture cell experiment

Recent measurements of the 7699 Å K I line by other authors have shown that the line asymmetry, during the 5-min oscillations, varies in an tiphase with the line shift. We have measured, at the center of the solar disk, the bisector variations of three Fe I photospheric lines at 6297.8 Å, 6301.5 Å and 6302.5 Å. The oscillating power of the line bisectors and of the line flanks is distributed in several modes, the highest one is at 3.45mHz. The power decreases along the bisector from the line core to the continuum, confirming previous results on the 7699 Å K I line. The oscillating power, at equal intensity levels in all the three observed lines, is generally different in the two line flanks, and it decreases differently from the line core to the continuum.