Constraint on nonmetric theories of gravity from supernova 1987A

Details Constraint on nonmetric theories of gravity from supernova 1987A Constraint on nonmetric theories of gravity from supernova 1987A

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvd..38.2927c&link_type=abstract

Physical Review D (Particles and Fields), Volume 38, Issue 10, 15 November 1988, pp.2927-2929

Physics

7

Supernovae

Scientific paper

The transit time of the neutrinos and photons from supernova 1987A to Earth was the same to better than one part in 109. This result provides a strong test of the weak equivalence principle, by showing that neutrinos and photons fall at the same rate in the gravitational field of the Galaxy. We examine a class of nonmetric theories of gravity in which neutrino trajectories follow a path equation, while photons follow a geodesic equation. Such theories can be parametrized in a manner similar to, but more general than, the parametrized-post-Newtonian formalism, and we discuss the constraints on the parameters of such theories imposed by the equality of transit times. The available experimental and observational constraints are not yet sufficient to show that the only allowed nonmetric theories of this class reduce to general relativity in the weak-field limit.

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