Volume 463, Number 1, February III 2007
|Page(s)||393 - 397|
|Section||Celestial mechanics and astrometry|
|Published online||20 November 2006|
The constancy of the Pioneer anomalous acceleration
Institute of Theoretical Astrophysics, University of Oslo, PO Box 1029 Blindern, 0315 Oslo, Norway e-mail: firstname.lastname@example.org
Accepted: 8 November 2006
Aims.The temporal evolution of the Pioneer anomalous acceleration is studied to determine its correlation with solar activity.
Methods.Bayesian Weighted Least Squares algorithms and Kalman filters are used to study the temporal evolution of the Pioneer anomalous acceleration. Doppler data for Pioneer 10 and 11 spanning respectively 11 and 3.5 years were used in this study.
Results.The Doppler data itself can not be used to distinguish between a constant acceleration model and acceleration proportional to the remaining plutonium in the radioisotope thermoelectric generators. There are significant short term variations in the anomalous acceleration. These are shown to be consistent with radio plasma delay from coronal mass ejections.
Key words: celestial mechanics / ephemerides
© ESO, 2007
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