Structure formation in the symmetron model

Davis, A.-C.; Li, B.; Mota, D.F.; Winther, H.A.

Abstract

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.

Citation

Davis, A., Li, B., Mota, D., & Winther, H. (2012). Structure formation in the symmetron model. Astrophysical Journal, 748(1), Article 61. https://doi.org/10.1088/0004-637x/748/1/61

• Journal Article Type: Article
• Publication Date: Mar 20, 2012
• Deposit Date: Jan 20, 2012
• Publicly Available Date: May 2, 2014
• Journal: Astrophysical Journal
• Print ISSN: 0004-637X
• Electronic ISSN: 1538-4357
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 748
• Issue: 1
• Article Number: 61
• DOI: https://doi.org/10.1088/0004-637x/748/1/61
• Keywords: Cosmology: miscellaneous, Cosmology: theory, Large-scale structure of Universe.