Gravity Inside a Nonrotating, Homogeneous, Spherical Body

Details Gravity Inside a Nonrotating, Homogeneous, Spherical Body Gravity Inside a Nonrotating, Homogeneous, Spherical Body

2012-03-20

arxiv.org/abs/1203.4750v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, 1 figure, 5 references, REVTex 4.1

Scientific paper

Schwarzschild's `interior solution' is a space-time metric that satisfies Einstein's gravitational field equations with a source term that Einstein created on the basis of an unjustified identification of the conceptually distinct notions of the passive gravitational mass of matter and the active gravitational mass of matter. Giving up that assumption allows deriving from a variational principle new and better (because logically obtained) field equations that more faithfully extend the Poisson equation for Newton's gravity than do Einstein's, with an active gravitational mass density providing the source term. Solving these equations for a nonrotating spherical ball of matter with uniform mass density produces a new, improved interior metric matched at the surface of the ball to Schwarzschild's `exterior' solution metric. This new metric can then be used to address questions about the flight times of photons and neutrinos through such a ball of matter.

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