Helioseismic Determination of the Solar Rotation Axis
The Astrophysical Journal2005Vol. 621(2), pp. L153–L156
Citations Over TimeTop 11% of 2005 papers
Abstract
Time-distance helioseismology analysis of Dopplergrams from the Michelson Doppler Imager instrument on board the Solar and Heliospheric Observatory spacecraft provides a very accurate measurement of meridional flows. This shows a sinusoidal variation with a period of 1 yr and was identified by P. Giles to be due to an error in the determination of the solar rotation axis. The phase and amplitude of the annual variation of meridional flows are used to determine the error in the Carrington elements. After comparing with other recent estimates of the Carrington elements, we suggest the following values: i = 7155 ± 0002 and Ω = -735 ± 01.
Related Papers
- → Helioseismology of Time-Varying Flows Through The Solar Cycle(2004)88 cited
- → Time-Distance Helioseismology With f Modes as a Method for Measurement of Near-Surface Flows(2000)66 cited
- → Observation of oscillation coupling ratios and the meridional flow(2011)3 cited
- → Helioseismic measurements of differential rotation and meridional flow(2012)
- → Solar Rotation and Large-Scale Flows Measured by Time-Distance Helioseismology from Mdi(1998)