STRUCTURE FORMATION IN THE SYMMETRON MODEL

Journal Article · Tue Mar 20 00:00:00 EDT 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/748/1/61· OSTI ID:22016143

Davis, Anne-Christine; Baojiu, Li ^[1]; Mota, David F; Winther, Hans A ^[2]

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1. DAMTP, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)
2. Institute of Theoretical Astrophysics, University of Oslo, 0315 Oslo (Norway)

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 such mechanism that relies on restoration of a spontaneously broken symmetry in regions of high density to shield the scalar fifth force. We have investigated structure formation in the symmetron model by using N-body simulations and find observable signatures in both the linear and nonlinear matter power spectrum and on the halo mass function. The mechanism for suppressing the scalar fifth force in high-density regions is also found to work very well.

• OSTI ID: 22016143
• Journal Information: Astrophysical Journal, Vol. 748, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COMPUTERIZED SIMULATION
COSMOLOGICAL MODELS
COSMOLOGY
NONLINEAR PROBLEMS
SCALAR FIELDS
SYMMETRY BREAKING
UNIVERSE