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Paper: Preliminary results from observations with the Fourier tachometer
Volume: 40, Inside the Stars, IAU Colloquium 137
Page: 90
Authors: Schou, J.; Brown, T. M.; Bachman, K. T.
Abstract: Recently several interesting results concerning the time dependence of solar p-mode frequencies have appeared. In particular it has been shown that the mode frequencies change with solar activity (Libbrecht and Woodard, 1991). We present preliminary results from an analysis of two 3-mo observation runs with the Fourier Tachometer (which was operated by HAO and NSO) from 1987 and 1989. The analysis was done with two different methods in order to test for systematic errors. We show that the mode frequencies change in a manner similar to that reported by Libbrecht and Woodard. We also present results for the frequency splittings caused by the solar rotation.
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