Bonn 2020 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 11: Alteranative Classical Theories of Gravitation

GR 11.3: Vortrag

Donnerstag, 2. April 2020, 14:30–14:45, H-HS V

Post-Newtonian limit of general scalar-torsion theories of gravity — •Kai Flathmann1 and Manuel Hohmann21Institute for Physics, University of Oldenburg, 26129 Oldenburg, Germany — 2Laboratory of Theoretical Physics, Institute of Physics, University of Tartu, 50411 Tartu, Estonia

In this talk we derive the post-Newtonian limit of a general class of teleparallel theories of gravity, where the action is a free function of the Torsion scalar and several quantities derived from a dynamical scalar field. In order to use the parameterized post-Newtonian (PPN) formalism without modifications, such as introducing an effective gravitational constant, we restrict the analysis to a massless scalar field. This class of theories is fully conservative, with only two non-vanishing PPN parameters. For a particular choice of the free function, the theory is even indistinguishable from General Relativity in its post-Newtonian approximation.

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