Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2011-04-24
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Scientific paper
Nordstrom's theory of gravity, which describes gravity by a scalar field in
flat spacetime, is observationally ruled out. It is however the only theory of
gravity with General Relativity to obey the strong equivalence principle. I
show in this paper that this remarkable property is true beyond post-newtonian
level and can be related to the existence of a 'Nordstrom-Katz' superpotential.
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