The splashback radius in symmetron gravity

Abstract

The splashback radius $r_{\mathrm{sp}}$ has been identified in cosmological $N$-body simulations as an important scale associated with gravitational collapse and the phase-space distribution of recently accreted material. We employ a semi-analytical approach to study the spherical collapse of dark matter haloes in symmetron gravity and provide insights into how the phenomenology of splashback is affected. The symmetron is a scalar-tensor theory of gravity which exhibits a screening mechanism whereby higher-density regions are screened from the effects of a fifth force. In this model, we find that, as over-densities grow over cosmic time, the inner region becomes heavily screened. In particular, we identify a sector of the parameter space for which material currently sitting at $r_{\mathrm{sp}}$ has followed, during the collapse, the formation of this screened region. As a result, we find that for this part of the parameter space the splashback radius is maximally affected by the symmetron force and we predict changes in $r_{\mathrm{sp}}$ up to around $10\%$ compared to its General Relativity value. Because this margin is within the precision of present splashback experiments, we expect this feature to soon provide constraints for symmetron gravity on previously unexplored scales.

9 pages, 3 figures. Comments are welcome

References in corpus (46)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Is Cosmic Speed-Up Due to New Gravitational Physics?
• Symmetron Fields: Screening Long-Range Forces Through Local Symmetry Restoration
• Rotation-Dependent Catastrophic Disruption of Gravitational Aggregates
• Dependence of the outer density profiles of halos on their mass accretion rate
• Planck 2015 results. XIV. Dark energy and modified gravity
• Quintessence without scalar fields
• Symmetron Cosmology
• Astrophysical Tests of Modified Gravity: Constraints from Distance Indicators in the Nearby Universe
• Detection of the Splashback Radius and Halo Assembly bias of Massive Galaxy Clusters
• Probing modifications of General Relativity using current cosmological observations
• The nonlinear matter and velocity power spectra in f(R) gravity
• A Precise Cluster Mass Profile Averaged from the Highest-Quality Lensing Data
• Cluster Density Profiles as a Test of Modified Gravity
• What can Cosmology tell us about Gravity? Constraining Horndeski with Sigma and Mu
• Structure Formation in the Symmetron Model
• The accretion history of dark matter halos II: The connections with the mass power spectrum and the density profile
• Systematic simulations of modified gravity: symmetron and dilaton models
• The Halo Boundary of Galaxy Clusters in the SDSS
• Lensing Constraints on the Mass Profile Shape and the Splashback Radius of Galaxy Clusters
• Relativistic scalar fields and the quasi-static approximation in theories of modified gravity
• The outer profile of dark matter halos: an analytical approach
• Measurement of the Splashback Feature around SZ-selected Galaxy Clusters with DES, SPT and ACT
• Cosmological simulations of screened modified gravity out of the static approximation: effects on matter distribution
• Testing Gravity with the Stacked Phase Space around Galaxy Clusters
• Galaxy Infall Kinematics as a Test of Modified Gravity
• Self-Similar Solutions of Triaxial Dark Matter Halos
• Constraining symmetron fields with atom interferometry
• Splashback in galaxy clusters as a probe of cosmic expansion and gravity
• Weak lensing constraints on splashback around massive clusters
• Spherical Collapse in Chameleon Models
• Spherical collapse in modified gravity with the Birkhoff-theorem
• The Fifth Force in the Local Cosmic Web
• Pulsar Constraints on Screened Modified Gravity
• Stellar kinematics from the symmetron fifth force in the Milky Way disk
• Halo Scale Predictions of Symmetron Modified Gravity
• Constraining screened fifth forces with the electron magnetic moment
• Turnaround radius in $f(R)$ model
• Spherical collapse and halo mass function in the symmetron model
• Spontaneous symmetry breaking in cosmos: The hybrid symmetron as a dark energy switching device
• Universal predictions of screened modified gravity on cluster scales
• Effects of modified gravity on the turnaround radius in cosmology
• Probing modified gravity via the mass-temperature relation of galaxy clusters
• Nonlinearities in modified gravity cosmology I: signatures of modified gravity in the nonlinear matter power spectrum
• CHAM: a fast algorithm of modelling non-linear matter power spectrum in the sCreened HAlo Model
• Testing modified gravity with globular clusters: the case of NGC 2419

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• The splashback radius of optically selected clusters with Subaru HSC Second Public Data Release
• The Classical Symmetron Force in Casimir Experiments
• Gravitational transitions via the explicitly broken symmetron screening mechanism
• What sets the splashback radius of dark matter haloes: accretion history or other properties?
• 50 Years of Horndeski Gravity: Past, Present and Future
• AMICO galaxy clusters in KiDS-DR3: measuring the splashback radius from weak gravitational lensing
• Turnaround size of non-spherical structures
• The eROSITA Final Equatorial-Depth Survey (eFEDS) -- Splashback radius of X-ray galaxy clusters using galaxies from HSC survey
• An IllustrisTNG View of the Caustic Technique for Galaxy Cluster Mass Estimation
• The mass-size relation of galaxy clusters
• Imprints of screened dark energy on nonlocal quantum correlations
• Backreaction of Schwinger pair creation in massive QED${}_2$
• Cosmology in the non-linear regime : the small scale miracle
• Dynamical cluster masses from photometric surveys
• Anisotropy and characteristic scales in halo density gradient profiles
• Spherical accretion of collisional gas in modified gravity I: self-similar solutions and a new cosmological hydrodynamical code
• The mass and galaxy distribution around SZ-selected clusters
• Splashback radius and the mass accretion rate of RASS MCMF galaxy clusters
• Galaxy Cluster Mass Estimation Through The Splashback Radius
• A dynamics-based density profile for dark haloes. I. Algorithm and basic results
• On the Kinematic Morphology around Halos
• The Splashback Mass Function of Galaxy Clusters from Photometric Data