New Horizons and the Onset of the Pioneer Anomaly

Details New Horizons and the Onset of the Pioneer Anomaly New Horizons and the Onset of the Pioneer Anomaly

2007-10-26

arxiv.org/abs/0710.5135v2

Phys.Lett.B659:483-485,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages 2 figures Revision includes final corrections for publication

Scientific paper

10.1016/j.physletb.2007.11.067

Analysis of the radio tracking data from the Pioneer 10/11 spacecraft at distances between about 20 - 70 AU from the Sun has indicated the presence of an unmodeled, small, constant, Doppler blue shift which can be interpreted as a constant acceleration of a_P= (8.74 \pm 1.33) \times 10^{-8} cm/s^2 directed approximately towards the Sun. In addition, there is early (roughly modeled) data from as close in as 5 AU which indicates there may have been an onset of the anomaly near Saturn. We observe that the data now arriving from the New Horizons mission to Pluto and the Kuiper Belt could allow a relatively easy, direct experimental test of whether this onset is associated with distance from the Sun (being, for example, an effect of drag on dark matter). We strongly urge that this test be done.

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