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Towards Strong Field Tests of Beyond Horndeski Gravity Theories
Jeremy Sakstein, Eugeny Babichev, Kazuya Koyama +2
Theories of gravity in the beyond Horndeski class encompass a wide range of scalar-tensor theories that will be tested on cosmological scales over the coming decade. In this work,…
Stellar Pulsations in Beyond Horndeski Gravity Theories
Jeremy Sakstein, Michael Kenna-Allison, Kazuya Koyama
Theories of gravity in the beyond Horndeski class recover the predictions of general relativity in the solar system whilst admitting novel cosmologies, including late-time de Sitte…
A Compendium of Chameleon Constraints
Clare Burrage, Jeremy Sakstein
The chameleon model is a scalar field theory with a screening mechanism that explains how a cosmologically relevant light scalar can avoid the constraints of intra-solar-system sea…
Relativistic Stars in Beyond Horndeski Theories
Eugeny Babichev, Kazuya Koyama, David Langlois +2
This work studies relativistic stars in beyond Horndeski scalar-tensor theories that exhibit a breaking of the Vainshtein mechanism inside matter, focusing on a model based on the…
Testing Gravity Using Galaxy Clusters: New Constraints on Beyond Horndeski Theories
Jeremy Sakstein, Harry Wilcox, David Bacon +2
The Beyond Horndeski class of alternative gravity theories allow for Self-accelerating de-Sitter cosmologies with no need for a cosmological constant. This makes them viable altern…