Invariant quantities of scalar–tensor theories for stellar structure
Aleksander Kozak (Institute of Theoretical physics, University of Wroclaw, pl. Maxa Borna 9, Wrocław, 50-206, Poland); Aneta Wojnar (Laboratory of Theoretical Physics, Institute of Physics, University of Tartu, W. Ostwaldi 1, Tartu, 50411, Estonia)
We present the relativistic hydrostatic equilibrium equations for a wide class of gravitational theories possessing a scalar–tensor representation. It turns out that the stellar structure equations can be written with respect to the scalar–tensor invariants, allowing to interpret their physical role.
