All Outputs (5)

SELCIE: a tool for investigating the chameleon field of arbitrary sources (2021)
Journal Article

The chameleon model is a modified gravity theory that introduces an additional scalar field that couples to matter through a conformal coupling. This `chameleon field' possesses a screening mechanism through a nonlinear self-interaction term which al... Read More about SELCIE: a tool for investigating the chameleon field of arbitrary sources.

Fifth-force screening around extremely compact sources (2021)
Journal Article

Many non-linear scalar field theories possess a screening mechanism that can suppress any associated fifth force in dense environments. As a result, these theories can evade local experimental tests of new forces. Chameleon-like screening, which occu... Read More about Fifth-force screening around extremely compact sources.

Charting galactic accelerations: when and how to extract a unique potential from the distribution function (2021)
Journal Article

The advent of data sets of stars in the Milky Way with 6D phase-space information makes it possible to construct empirically the distribution function (DF). Here, we show that the accelerations can be uniquely determined from the DF using the collisi... Read More about Charting galactic accelerations: when and how to extract a unique potential from the distribution function.

φenics: Vainshtein screening with the finite element method (2021)
Journal Article

Within the landscape of modified theories of gravity, progress in understanding the behaviour of, and developing tests for, screening mechanisms has been hindered by the complexity of the field equations involved, which are nonlinear in nature and ch... Read More about φenics: Vainshtein screening with the finite element method.

Massive Galileons and Vainshtein screening (2021)
Journal Article

The Vainshtein screening mechanism relies on nonlinear interaction terms becoming dominant close to a compact source. However, theories displaying this mechanism are generally understood to be low-energy theories: it is unclear that operators emergin... Read More about Massive Galileons and Vainshtein screening.