Frequency decomposition of astrometric signature of planetary systems
Abstract
We present theoretical analysis of the astrometric searches for extrasolar planets with the Space Interferometry Mission (SIM). Particularly, we derive a model for the future measurements with SIM and discuss the problem of reliable estimation of orbital elements of planets. For this purpose we propose a new method of data analysis and present a numerical test of its application on simulated SIM astrometric measurements of Andromedae planetary system. We demonstrate that our approach allows successfull determination of its orbital elements.
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