Shape of Clusters as a Probe of Screening Mechanisms in Modified Gravity

Abstract

Scalar fields are crucial components in high energy physics and extensions of General Relativity. The fact they are not observed in the solar system may be due to a mechanism which screens their presence in high dense regions. We show how observations of the ellipticity of galaxy clusters can discriminate between models with and without scalar fields and even between different screening mechanisms. Using nowadays X-ray observations we put novel constraints on the different models.

4 pages, 3 figures, matches version accepted for publication in PRL

References in corpus (2)

• Combined strong and weak lensing analysis of 28 clusters from the Sloan Giant Arcs Survey
• Constraining Cluster Physics with the Shape of X-ray Clusters: Comparison of Local X-ray Clusters versus LCDM Clusters

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• Dark matter haloes in modified gravity and dark energy: interaction rate, small-, and large-scale alignment
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• Screenings in Modified Gravity: a perturbative approach
• Detecting Domain Walls in Laboratory Experiments
• An Electrostatic Analogy for Symmetron Gravity
• VST ATLAS Galaxy Cluster Catalogue I: cluster detection and mass calibration
• Dark Energy Simulations
• Breaking the cosmological invariance of the dark matter halos shape as a new probe of modified gravity