Dark matter effects in vacuum spacetime

Details Dark matter effects in vacuum spacetime Dark matter effects in vacuum spacetime

2010-06-21

arxiv.org/abs/1006.4059v2

Phys. Rev. D 82, 027301 (2010)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, 2 figures, expanded with comments about the exact motion and curvature invariants

Scientific paper

10.1103/PhysRevD.82.027301

We analyze a toy model describing an empty spacetime in which the motion of a test mass (and the trajectories of photons) evidence the presence of a continuous and homogeneous distribution of matter; however, since the energy-momentum tensor vanishes, no real matter or energy distribution is present at all. Thus, a hypothetical observer will conclude that he is immersed in some sort of dark matter, even though he has no chance to directly detect it. This suggests yet another possibility of explaining the elusive dark matter as a purely dynamical effect due to the curvature of spacetime.

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