Scalar-Tensor-Vector Gravity: solutions with matter content

LOPEZ ARMENGOL, FEDERICO G.; ROMERO, GUSTAVO E

Congreso; 58 Reunión Anual de la Asociación Argentina de Astronomía; 2015

Scalar-Tensor-Vector Gravity (STVG) is an alternative theory of the gravitational interaction. Its weak field approximation has successfully described Solar System observations, galaxy rotation curves, dynamics of galaxy clusters, and cosmological data, without the imposition of dark components. The theory was formulated by John Moffat in 2006. We explore non-vacuum solutions of STVG and apply them to some stellar toy-models. Specifically, we derive the modified Tolman-Oppenheimer-Volkoff equation in STVG and integrate it for different polytropic equations of state. We find that stellar models in STVG admit larger masses than in general relativity (GR). Maximum masses depend on the factor that quantifies the deviation from GR.