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Preferred frame parameters in the Tensor-Vector-Scalar theory of gravity

We present results of our calculation of the preferred frame PPN parameters alpha1 and alpha2 for TeVeS, with the cosmological value of the scalar field taken into account. We find that the cosmological value of the scalar field is tightly linked to the vector field coupling constant K, preventing the former from evolving as predicted by its equation of motion. We show that generalizing TeVeS to have an Aether type vector action removes the aforesaid link, whereas TeVes' beta, gamma and xi PPN parameters are identical to those in GR. We also derive bounds on the coupling parameters of generalized TeVeS from solar system constraints on alpha1 and alpha2.

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