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

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arxiv 1006.1950 v2 pith:EG7V2FJC submitted 2010-06-10 astro-ph.CO gr-qchep-phhep-th

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

classification astro-ph.CO gr-qchep-phhep-th
keywords massiveclusterclustersconditionsconstraininitialnon-gaussiannon-gaussianity
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Very massive high redshift clusters can be used to constrain and test the Lambda CDM model. Taking into account the observational constraints of Jee et al. (2009) we have calculated the probability for the most massive cluster to be found in the range (5.2-7.6)e14 M_sun, between redshifts 1.4-2.2, with a sky area of 11 sqdeg 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 f_NL.

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