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Title: | Implications for primordial non-Gaussianity (fNL) from weak lensing masses of high-z galaxy clusters |
Author: | Jiménez, Raúl (Jiménez Tellado) Verde, Licia |
Keywords: | Física de partícules Experiments Cúmuls de galàxies Particle physics Experiments Clusters of galaxies |
Issue Date: | 18-Dec-2009 |
Publisher: | American Physical Society |
Abstract: | The recent weak-lensing measurement of the dark matter mass of the high-redshift galaxy cluster XMMUJ2235.3-2557 of ( 8.5 ± 1.7 ) × 10 14 M ⊙ at z = 1.4 , indicates that, if the cluster is assumed to be the result of the collapse of dark matter in a primordial Gaussian field in the standard lambda cold dark matter model, then its abundance should be < 2 × 10 − 3 clusters in the observed area. Here we investigate how to boost the probability of XMMUJ2235.3-2557, in particular, resorting to deviations from Gaussian initial conditions. We show that this abundance can be boosted by factors > 3 - 10 if the non-Gaussianity parameter f local NL is in the range 150-200. This value is comparable to the limit for f NL obtained by current constraints from the cosmic microwave background. We conclude that mass determination of high-redshift, massive clusters can offer a complementary probe of primordial non-Gaussianity. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.80.127302 |
It is part of: | Physical Review D, 2009, vol. 80, num. 12, p. 127302 |
URI: | http://hdl.handle.net/2445/131762 |
Related resource: | https://doi.org/10.1103/PhysRevD.80.127302 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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