Bremen 2017 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 7: Klassische Allgemeine Relativitätstheorie 2

GR 7.5: Vortrag

Dienstag, 14. März 2017, 17:30–17:45, SFG 0140

Parametrized post-Newtonian limit of ghost-free bimetric massive gravity — •Manuel Hohmann — Physikalisches Institut, Universität Tartu, Estland

We consider the unique action of ghost-free massive gravity with two metric tensors and a coupling potential. In our setting we allow for two different types of matter, both modelled as perfect fluids, coupled to their corresponding metrics. Since there is no direct, non-gravitational interaction between these two matter sectors, they mutually appear dark, and can hence be interpreted as dark and visible matter.

Here we focus on the gravitational interaction both within each sector and between the sectors in the parametrized post-Newtonian (PPN) limit. We derive the PPN parameters of the theory and discuss their consistency with observations in the solar system.