Year: 2011
Type: article
Abstract: We propose a new approach to test possible corrections to Newtonian gravity using solar physics. The high accuracy of current solar models and new precise observations allow us to constrain corrections to standard gravity at unprecedented levels. Our case study is Eddington-inspired gravity, an attractive modified theory of gravity which results in non-singular cosmology and collapse. The theory is equivalent to standard gravity in vacuum, but it sensibly differs from it within matter. For instance, it affects the evolution and the equilibrium structure of the Sun, giving different core temperature profiles, and deviations in the observed acoustic modes and in solar neutrino fluxes. Comparing the predictions from a modified solar model with observations, we constrain the coupling parameter of the theory, |κ g | ≲ 3 × 10 5 m 5 s −2 kg −1 . Our results show that the Sun can be used to efficiently constrain alternative theories of gravity.
Source: The Astrophysical Journal
Authors: Jordi Casanellas, Paolo Pani, Ilídio Lopes, Vitor Cardoso
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2067926301