Solar System constraints on local dark matter density
نویسندگان
چکیده
منابع مشابه
Experimental Constraints on the Axion Dark Matter Halo Density
We report results from an ongoing search for cold dark matter axions using a single resonant cavity in a large magnetic field for the purposes of stimulating axion decay. Potential candidates were investigated in 750 Hz intervals over the frequency range 550≤ f ≤ 810 MHz (2.3 μeV ≤ma ≤ 3.4 μeV). From the lack of a persistent signal, we conclude that KSVZ axions contribute no more than 0.45 GeV/...
متن کاملSolar System Constraints on Gauss-Bonnet Mediated Dark Energy
Although the Gauss-Bonnet term is a topological invariant for general relativity, it couples naturally to a quintessence scalar field, modifying gravity at solar system scales. We determine the solar system constraints due to this term by evaluating the post-Newtonian metric for a distributional source. We find a mass dependent, 1/r correction to the Newtonian potential, and also deviations fro...
متن کاملSolar System Constraints on f(G) Dark Energy
Corrections to solar system gravity are derived for f(G) gravity theories, in which a function of the Gauss-Bonnet curvature term is added to the gravitational action. Their effects on Newton’s law, as felt by the planets, and on the frequency shift of signals from the Cassini spacecraft, are both determined. Despite the fact that the Gauss-Bonnet term is quadratic in curvature, the resulting c...
متن کاملSolar System Constraints on Gauss-Bonnet Dark Energy
Abstract. Quadratic curvature Gauss-Bonnet gravity may be the solution to the dark energy problem, but a large coupling strength is required. This can lead to conflict with laboratory and planetary tests of Newton’s law, as well as light bending. The corresponding constraints are derived. If applied directly to cosmological scales, the resulting bound on the density fraction is |ΩGB| . 3.6×10−32.
متن کاملNew Constraints on “ Cool ” Dark Matter
It has been suggested that a sterile neutrino ν s which mixes with standard neutrinos can form nonthermal " cool " Dark Matter if its mass and mixing angle fall in the ranges 0.1 keV < ∼ m s < ∼ 10 keV and 10 −10 < ∼ sin 2 θ < ∼ 10 −4 , respectively. We point out that the required mixing makes these heavy neutrinos unstable. The dominant decay mode is into three light neutrinos, but the most st...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2012
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2012/07/047