Journal Article

Probability of the most massive cluster under non-Gaussian initial conditions

Laura Cayón, Christopher Gordon and Joseph Silk

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 415, issue 1, pages 849-853
Published in print July 2011 | ISSN: 0035-8711
Published online July 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.18770.x
Probability of the most massive cluster under non-Gaussian initial conditions

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Very massive high-redshift clusters can be used to constrain and test the Λ cold dark matter (ΛCDM) model. Taking into account the observational constraints of Jee et al., we have calculated the probability for the most massive cluster to be found in the range (5.2–7.6) × 1014 M, between redshifts 1.4 ≤z≤ 2.2, with a sky area of 11 deg2 and under non-Gaussian initial conditions. Clusters constrain the non-Gaussianity on smaller scales than current cosmic microwave background or halo bias data and so can be used to test for running of the non-Gaussianity parameter fNL.

Keywords: methods: statistical; cosmology: miscellaneous

Journal Article.  3420 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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