Journal
ASTROPHYSICAL JOURNAL
Volume 748, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/748/1/61
Keywords
cosmology: miscellaneous; cosmology: theory; large-scale structure of Universe
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Funding
- Research Council of Norway FRINAT [197251/V30]
- Queens' College
- Department of Applied Maths and Theoretical Physics of University of Cambridge
- STFC
- [PTDC/FIS/111725/2009]
- [CERN/FP/116398/2010]
- STFC [ST/G000581/1, ST/J000434/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000434/1, ST/G000581/1] Funding Source: researchfish
- Fundação para a Ciência e a Tecnologia [CERN/FP/116398/2010] Funding Source: FCT
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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.
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