“School of Physics”
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| Paper IPM / P / 8605 |
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| Abstract: | |
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The Pioneers 10 and 11, spacecrafts deployed to explore the
outer solar system, are reported to have experienced a constant
anomalous acceleration toward the Sun. We examine if a generic
functional of the Riemann-tensor squared can be the cause of the
observed Pioneers' anomaly. The Lunar Laser Ranging measurements
combined with the Solar GM, the lunar GM from lunar orbiting
spacecrafts and the Earth's GM from LAGEOS satellite orbiting the
Earth, however, discards such resolution. These measurements also
constraint the corrections in the form of a functional of the Riemann
tensor's squared to gravity theories, and provide an evidence against
the covariant resolution of the anomalous rotational velocity curves
of the spiral galaxies without considering dark matter.
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