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Sensitivity and insensitivity of galaxy cluster surveys to new physics

Joshua Erlich1, Brian Glover1 and Neal Weiner2

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We study the implications and limitations of galaxy cluster surveys for constraining models of particle physics and gravity beyond the Standard Model. Flux limited cluster counts probe the history of large scale structure formation in the universe, and as a result provide useful constraints on cosmological parameters. As a result of uncertainties in some aspects of cluster dynamics, cluster surveys are currently more useful for analyzing physics that would affect the formation of structure than physics that would modify the appearance of clusters. As an example we consider the ΛCDM (Λ cold dark matter) cosmology and dimming mechanisms, such as photon–axion mixing.


Keywords

classical tests of cosmology

cosmology of theories beyond the SM

PACS

98.65.Cw Galaxy clusters

98.65.Dx Superclusters; large-scale structure of the Universe (including voids, pancakes, great wall, etc.)

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

98.80.Es Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc)

Subjects

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 03 (March 2008)

Received 27 September 2007, accepted for publication 18 February 2008

Published 10 March 2008



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