Invariant quantities of Scalar-Tensor Theories for stellar structure

TL;DR

This paper derives relativistic stellar structure equations within scalar-tensor theories, emphasizing invariant quantities to better understand their physical significance in gravitational models.

Contribution

It introduces a formulation of stellar structure equations using scalar-tensor invariants, providing a new perspective on their physical interpretation.

Findings

Equations expressed in terms of scalar-tensor invariants.

Enhanced understanding of the physical role of invariants.

Applicability to a wide class of scalar-tensor theories.

Abstract

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.