Anti-screening of the Galileon force around a disk center hole
arXiv:1802.04969 · doi:10.1142/S0217732319500135
Abstract
The Vainshtein mechanism is known as an efficient way of screening the fifth force around a matter source in modified gravity. This has been verified mainly in highly symmetric matter configurations. To study how the Vainshtein mechanism works in a less symmetric setup, we numerically solve the scalar field equation around a disk with a hole at its center in the cubic Galileon theory. We find, surprisingly, that the Galileon force is enhanced, rather than suppressed, in the vicinity of the hole. This anti-screening effect is larger for a thinner, less massive disk with a smaller hole. At this stage our setup is only of academic interest and its astrophysical consequences are unclear, but this result implies that the Vainshtein screening mechanism around less symmetric matter configurations is quite nontrivial.
arXiv comment11 pages, 18 figures
References in corpus (49)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Planck 2013 results. XVI. Cosmological parameters
- Dynamics of dark energy
- The Seventh Data Release of the Sloan Digital Sky Survey
- Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
- Modified Gravity and Cosmology
- The Confrontation between General Relativity and Experiment
- Multi-messenger Observations of a Binary Neutron Star Merger
- The galileon as a local modification of gravity
- Chameleon Cosmology
- Generalized G-inflation: Inflation with the most general second-order field equations
- From k-essence to generalised Galileons
- Covariant Galileon
- Dark Energy after GW170817: dead ends and the road ahead
- Generalized Galileons: All scalar models whose curved background extensions maintain second-order field equations and stress tensors
- Symmetron Fields: Screening Long-Range Forces Through Local Symmetry Restoration
- An introduction to the Vainshtein mechanism
- Galileon Cosmology
- k-Mouflage gravity
- The Dilaton and Modified Gravity
- Self-Accelerating Universe in Galileon Cosmology
- Vainshtein screening in a cosmological background in the most general second-order scalar-tensor theory
- Galileon Gravity in Light of ISW, CMB, BAO and data
- Breaking of Vainshtein screening in scalar-tensor theories beyond Horndeski
- Effective theory for the Vainshtein mechanism from the Horndeski action
- Vainshtein mechanism after GW170817
- Nonlinear structure formation in the Cubic Galileon gravity model
- Evolution of linear cosmological perturbations and its observational implications in Galileon-type modified gravity
- Laboratory Tests of the Galileon
- Screening fifth forces in k-essence and DBI models
- Using Voids to Unscreen Modified Gravity
- Cosmic Web and Environmental Dependence of Screening: Vainshtein vs. Chameleon
- Galileon Radiation from Binary Systems
- Partial accretion in the propeller stage of low mass X-ray binary Aql X--1
- Black holes in a cubic Galileon universe
- Screening the fifth force in the Horndeski's most general scalar-tensor theories
- Testing general scalar-tensor gravity and massive gravity with cluster lensing
- Equivalence Principle Violation in Vainshtein Screened Two-Body Systems
- Observational Constraints on Kinetic Gravity Braiding from the Integrated Sachs-Wolfe Effect
- D-BIonic Screening of Scalar Fields
- The Shape Dependence of Vainshtein Screening
- Galileons and strong gravity
- Quantum corrections for the cubic Galileon in the covariant language
- Black hole accretion discs and screened scalar hair
- Astrophysical black holes in screened modified gravity
- Weak lensing probe of cubic Galileon model