The Pioneer Anomaly and Its Implications

Details The Pioneer Anomaly and Its Implications The Pioneer Anomaly and Its Implications

2005-10-17

arxiv.org/abs/gr-qc/0510081v1

EAS Publ.Ser. 20 (2006) 243-250

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, 2 figures. Invited talk given at the XXIst IAP Colloquium on "Mass Profiles and Shapes of Cosmological Structures", P

Scientific paper

10.1051/eas:2006078

The Pioneer 10/11 spacecraft yielded the most precise navigation in deep space to date. However, their radio-metric tracking data has consistently indicated the presence of a small, anomalous, Doppler frequency drift. The drift is a blue-shift, uniformly changing with a rate of ~6 x 10^{-9} Hz/s and can be interpreted as a constant sunward acceleration of each particular spacecraft of a_P =(8.74 +/- 1.33) x 10^{-10} m/s^2. The nature of this anomaly remains unexplained. Here we summarize our current knowledge of the discovered effect and review some of the mechanisms proposed for its explanation. Currently we are preparing for the analysis of the entire set of the available Pioneer 10/11 Doppler data which may shed a new light on the origin of the anomaly. We present a preliminary assessment of such an intriguing possibility.

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