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• W2068331206 abstract "We perform a sensitivity study of dark energy (DE) constraints from galaxy cluster surveys to uncertainties in the halo mass function, bias, and the mass-observable relation. For a set of idealized surveys, we evaluate cosmological constraints as priors on 16 nuisance parameters in the halo modeling are varied. We find that surveys with a higher mass limit are more sensitive to mass-observable uncertainties while surveys with low mass limits that probe more of the mass-function shape and evolution are more sensitive to mass-function errors. We examine the correlations among nuisance and cosmological parameters. Mass-function parameters are strongly positively (negatively) correlated with ${ensuremath{Omega}}_{mathrm{DE}}$ ($w$). For the mass-observable parameters, ${ensuremath{Omega}}_{mathrm{DE}}$ is most sensitive to the normalization and its redshift evolution while $w$ is more sensitive to redshift evolution in the variance. While survey performance is limited mainly by mass-observable uncertainties, the current level of mass-function error is responsible for up to a factor of 2 degradation in ideal cosmological constraints. For surveys that probe to low masses (${10}^{13.5}{h}^{ensuremath{-}1}{M}_{ensuremath{bigodot}}$), even percent-level constraints on model nuisance parameters result in a degradation of $ensuremath{sim}sqrt{2}$ (2) on ${ensuremath{Omega}}_{mathrm{DE}}$ ($w$) relative to perfect knowledge." @default.
• W2068331206 created "2016-06-24" @default.
• W2068331206 creator A5074327907 @default.
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• W2068331206 date "2010-04-08" @default.
• W2068331206 modified "2023-09-25" @default.
• W2068331206 title "Sensitivity of galaxy cluster dark energy constraints to halo modeling uncertainties" @default.
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• W2068331206 doi "https://doi.org/10.1103/physrevd.81.083509" @default.
• W2068331206 hasPublicationYear "2010" @default.
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