513 citations · 6.8k across the 165 of their papers we have counts for
10 papers · 2 filters
The Cosmological Supersymmetron
Philippe Brax, Anne-Christine Davis, Hans A. Winther
Recently, a supersymmetric model of dark energy coupled to cold dark matter, the supersymmetron, has been proposed. In the absence of cold dark matter, the supersymmetron field con…
Modified Gravity Tomography
Philippe Brax, Anne-Christine Davis, Baojiu Li
We consider the effect of a scalar field degree of freedom on the dynamics of gravity from small to large scales. We show that the effects of modified gravity can be completely cap…
The Importance of Slow-roll Corrections During Multi-field Inflation
Anastasios Avgoustidis, Sera Cremonini, Anne-Christine Davis +3
We re-examine the importance of slow-roll corrections during the evolution of cosmological perturbations in models of multi-field inflation. We find that in many instances the pres…
Chameleon Gravity, Electrostatics, and Kinematics in the Outer Galaxy
R. Pourhasan, N. Afshordi, R. B. Mann +1
Light scalar fields are expected to arise in theories of high energy physics (such as string theory), and find phenomenological motivations in dark energy, dark matter, or neutrino…
Modified Gravity and the CMB
Philippe Brax, Anne-Christine Davis
We consider the effect of modified gravity on the peak structure of the Cosmic Microwave Background (CMB) spectrum. We focus on simple models of modified gravity mediated by a mass…
Linear Growth of Structure in the Symmetron Model
Philippe Brax, Carsten van de Bruck, Anne-Christine Davis +3
In the symmetron mechanism, the fifth force mediated by a coupled scalar field (the symmetron) is suppressed in high-density regions due to the restoration of symmetry in the symme…
Structure Formation in the Symmetron Model
Anne-Christine Davis, Baojiu Li, David F. Mota +1
Scalar fields, strongly coupled to matter, can be present in nature and still be invisible to local experiments if they are subject to a screening mechanism. The symmetron is one s…
Defrosting in an Emergent Galileon Cosmology
Laurence Perreault Levasseur, Robert Brandenberger, Anne-Christine Davis
We study the transition from an Emergent Galileon condensate phase of the early universe to a later expanding radiation phase. This "defrosting" or "preheating" transition is a con…
Nonlinear Structure Formation with the Environmentally Dependent Dilaton
Phil Brax, Carsten van de Bruck, Anne-C. Davis +2
We have studied the nonlinear structure formation of the environmentally dependent dilaton model using -body simulations. We find that the mechanism of suppressing the scalar fi…
Modified Gravity Makes Galaxies Brighter
Anne-Christine Davis, Eugene A. Lim, Jeremy Sakstein +1
We investigate the effect of modifed gravity with screening mechanisms, such as the chameleon or symmetron models, upon the structure of main sequence stars. We find that unscreene…