Measurements of Rotational Frequency Splitting of Low Angular Degree Modes

Abstract

The rotational splitting of low-degree p modes is still a controversial issue. There are small but nevertheless real discrepancies between the different measurements of splittings obtained with the existing helioseismology experiments from ground (BISON, IRIS, GONG, LOWL) or from space (VIRGO, GOLF, MDI). I review the current status of rotational splitting in the field of low-degree helioseismology and how we could explain the remaining discrepancies between the various sets of splittings.