The Pioneer's acceleration anomaly and Hubble's constant

Details The Pioneer's acceleration anomaly and Hubble's constant The Pioneer's acceleration anomaly and Hubble's constant

2002-12-04

arxiv.org/abs/gr-qc/0212019v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, LaTex, minor changes for submission

Scientific paper

The reported anomalous acceleration acting on the Pioneers spacecrafts could be seen as a consequence of the existence of some local curvature in light geodesics when using the coordinate speed of light in an expanding space-time. The effect is related with the non synchronous character of the underlying metric and therefore, planets closed orbits can not reveal it. It is shown that the cosmic expansion rate -the Hubble parameter H- has been indeed detected. Additionally, a relation for an existing annual term is obtained which depends on the cosine of the ecliptic latitude of the spacecraft, suggestingan heuristic analogy between the effect and Foucault's experiment - light rays playing a similar role in the expanding space than Foucault's Pendulum does while determining Earth's rotation. This statement could be seen as a benchmark for future experiments.

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