10,217 research outputs found
Disformal Transformations in Scalar-Torsion Gravity
We study disformal transformations in the context of scalar extensions to
teleparallel gravity, in which the gravitational interaction is mediated by the
torsion of a flat, metric compatible connection. We find a generic class of
scalar-torsion actions which is invariant under disformal transformations, and
which possesses different invariant subclasses. For the most simple of these
subclasses we explicitly derive all terms that may appear in the action. We
propose to study actions from this class as possible teleparallel analogues of
healthy beyond Horndeski theories.Comment: LaTeX, 11 pages. Contribution to the proceedings of the conference
"Teleparallel Universes" in Salamanca 26-28 November 2018; published versio
Parameterized post-Newtonian limit of Horndeski's gravity theory
We present a recent result on the parameterized post-Newtonian (PPN) limit of
Horndeski's gravity theory and its consistency with solar system observations.Comment: 2 pages, no figures; to appear in the conference proceedings of the
XIIth International Conference on Gravitation, Astrophysics and Cosmology,
World Scientific Publishing Compan
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