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Exact Spherically Symmetric Solutions in Massive Gravity | | Z. Berezhiani
; D. Comelli
; F. Nesti
; L. Pilo
; | | Date: |
12 Mar 2008 | | Abstract: | A phase of massive gravity free from pathologies can be obtained by coupling
the metric to an additional spin-two field. We study the gravitational field
produced by a static spherically symmetric body, by finding the exact solution
that generalizes the Schwarzschild metric to the case of massive gravity.
Besides the usual 1/r term, the main effects of the new spin-two field are a
shift of the total mass of the body and the presence of a new power-like term,
with sizes determined by the mass and the shape (the radius) of the source.
These modifications, being source dependent, give rise to a dynamical violation
of the Strong Equivalence Principle. Depending on the details of the coupling
of the new field, the power-like term may dominate at large distances or even
in the ultraviolet. The effect persists also when the dynamics of the extra
field is decoupled. | | Source: | arXiv, 0803.1687 | | Services: | Forum | Review | PDF | Favorites | |
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