Temporal variations of the rotation rate in the solar interior

Abstract

The temporal variations of the rotation rate in the solar interior are studied using frequency splittings from Global Oscillations Network Group (GONG) data obtained during the period 1995-99. We find alternating latitudinal bands of faster and slower rotation which appear to move towards the equator with time - similar to the torsional oscillations seen at the solar surface. This flow pattern appears to persist to a depth of about 0.1R_sun and in this region its magnitude is well correlated with solar activity indices. We do not find any periodic or systematic changes in the rotation rate near the base of the convection zone.

To appear in ApJ

References in corpus (6)

• Deeply penetrating banded zonal flows in the solar convection zone
• Ring diagram analysis of near-surface flows in the Sun
• Solar internal rotation rate and the latitudinal variation of the tachocline
• GONG p-mode frequency changes with solar activity
• Possible solar cycle variations in the convection zone
• Solar cycle variations of large scale flows in the Sun

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