On the Dependence of our Inferences about the Solar Internal Rotation on the Frequency Fitting Methodology

Bibcode
2009ASPC..416..221K
Korzennik, S. G.; Eff-Darwich, A.
Bibliographical reference

Solar-Stellar Dynamos as Revealed by Helio- and Asteroseismology: GONG 2008/SOHO 21 ASP Conference Series, Vol. 416, proceedings of a conference held 11-15 August 2008 at the High Altitude Observatory, Boulder, Colorado, USA. Edited by Mausumi Dikpati, Torben Arentoft, Irene González Hernández, Charles Lindsey, and Frank Hill. San Francisco: Astronomical Society of the Pacific, 2009., p.221

Advertised on:
12
2009
Number of authors
2
IAC number of authors
0
Citations
1
Refereed citations
0
Description
We show how inferences of the solar internal rotation rate depend on different aspects of the mode fitting procedure. We study the stability of the rotation rate and its variation with time through inversions of frequency splittings data sets computed from fitting 364, 728 and 2088-day long Michelson Doppler Imager (MDI) time series, 72-day long MDI time series and 108-day long Global Oscillation Network Group (GONG) time series with different fitting methodologies and acquired during Cycle 23. The frequency splittings obtained from MDI and GONG time-series through different fitting techniques are inverted to analyze the effect of the fitting methodology on the inferred rotation rate. In particular, we present inversions based on either individual frequencies (as derived by the fitting technique developed by Korzennik 2005), or frequency splittings parametrized in terms of Clebsh-Gordon (CG) coefficients. We present the impact of using either individual frequencies or CG coefficients on the inversion results.
Type
Non-refereed

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