Bound on the Dark Matter Density in the Solar System from Planetary Motions

Frère, J. -M.; Ling, F. -S.; Vertongen, G.

Bound on the Dark Matter Density in the Solar System from Planetary Motions

Authors

Frère, J. -M.

Ling, F. -S.

Vertongen, G.

Description

High precision planet orbital data extracted from direct observation, spacecraft explorations and laser ranging techniques enable to put a strong constraint on the maximal dark matter density of a spherical halo centered around the Sun. The maximal density at Earth's location is of the order $10^5$ ${\rm GeV/cm^3}$ and shows only a mild dependence on the slope of the halo profile, taken between 0 and -2. This bound is somewhat better than that obtained from the perihelion precession limits.
7 pages, 1 figure