3 papers
gr-qc2026
Lagrangian Extensions of Newtonian Gravity constrained by Solar System tests
Pedro H. Dalprá, Júlio C. Fabris, Hermano Velten +1
We explore an extension to Newtonian gravity through a generalised Lagrangian function with the introduction of a second dynamical scalar field. Building on previous research into…
gr-qc2025
A new framework for cosmological expansion in a reformulated Newtonian-Like gravity with variable G
Felipe S. Escórcio, Júlio C. Fabris, Júnior D. Toniato +1
A Newtonian-like theory inspired by the Brans-Dicke gravitational Lagrangian has been recently proposed in Ref. arXiv:2009.04434(v4). We propose here a new variant of this theory s…
gr-qc2024
Selecting energy-momentum trace dependent gravity theories with LSS
Jonas Pinheiro da Silva, Hermano Velten
We study scalar cosmological perturbations in modified gravity theories being the trace of the energy-momentum tensor. We provide detailed equations for the matter en…