Galilean-invariant scalar fields can strengthen gravitational lensing

Abstract

The mystery of dark energy suggests that there is new gravitational physics on long length scales. Yet light degrees of freedom in gravity are strictly limited by Solar System observations. We can resolve this apparent contradiction by adding a Galilean-invariant scalar field to gravity. Called Galileons, these scalars have strong self-interactions near overdensities, like the Solar System, that suppress their dynamical effect. These nonlinearities are weak on cosmological scales, permitting new physics to operate. In this Letter, we point out that a massive gravity inspired coupling of Galileons to stress energy gravity can have a surprising consequence: enhanced gravitational lensing. Because the enhancement appears at a fixed scaled location for a wide range of dark matter halo masses, stacked cluster analysis of weak lensing data should be able to detect or constrain this effect.

4 pages, 2 figures; v2: significant revision; improved results. v3: typos corrected, some minor revisions. Version to appear in PRL

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Cited by in corpus (54)

• Beyond the Cosmological Standard Model
• Massive Gravity
• Theoretical Aspects of Massive Gravity
• Analytic solutions in non-linear massive gravity
• Graviton Mass Bounds
• The Imperfect Fluid behind Kinetic Gravity Braiding
• Cosmology of the Galileon from Massive Gravity
• Bouncing Galileon Cosmologies
• On Black Holes in Massive Gravity
• Symmetries for Galileons and DBI scalars on curved space
• Inflation and primordial non-Gaussianities of "generalized Galileons"
• DBI Galileons in the Einstein Frame: Local Gravity and Cosmology
• Weak lensing by voids in modified lensing potentials
• Vainshtein Mechanism in Binary Pulsars
• Galileons in the Sky
• de Sitter Galileon
• Chronology Protection in Galileon Models and Massive Gravity
• The phenomenological approach to modeling the dark energy
• Massive Gravity on de Sitter and Unique Candidate for Partially Massless Gravity
• Constraining Disformally Coupled Scalar Fields
• Laboratory Tests of the Galileon
• Galileon Radiation from Binary Systems
• Galaxy Infall Kinematics as a Test of Modified Gravity
• Cosmological Tests of the Disformal Coupling to Radiation
• Exact Solutions in Massive Gravity
• Testing general scalar-tensor gravity and massive gravity with cluster lensing
• Conserved cosmological perturbation in Galileon models
• Topology and Dark Energy: Testing Gravity in Voids
• Disformal dark energy at colliders
• Galaxy cluster lensing masses in modified lensing potentials
• Mixed Galileons and Spherically Symmetric Solutions
• Shining Light on Modifications of Gravity
• Restricted Galileons
• Galileons on Cosmological Backgrounds
• Simulations of Galileon modified gravity: Clustering statistics in real and redshift space
• Galileon forces in the Solar System
• Constraining the $\Lambda$CDM and Galileon models with recent cosmological data
• First experimental constraints on the disformally coupled Galileon model
• Weak lensing by galaxy troughs with modified gravity
• Non-minimal derivative couplings of the composite metric
• Quantum Corrections in Galileons from Matter Loops
• On dark energy models of single scalar field
• G-Curvaton
• Classical Duals of Derivatively Self-Coupled Theories
• Behavior of perturbations on spherically symmetric backgrounds in multi-Galileon theory
• Detectability of Weak Lensing Modifications under Galileon Theories
• Testing gravity with halo density profiles observed through gravitational lensing
• Unveiling the Galileon in a three-body system : scalar and gravitational wave production
• Lectures on Screened Modified Gravity
• Second-order weak lensing from modified gravity
• Potential of the neutron Lloyd's mirror interferometer for the search for new interactions
• Metric-Affine Formalism of Higher Derivative Scalar Fields in Cosmology
• Halo models in modified gravity theories with self-accelerated expansion
• Connecting Inflation to the NANOGrav 15-year Data Set via Massive Gravity