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Journal Paper

전체
A non-parametric consistency test of the ΛCDM model with Planck CMB data
  • 2017-09-20
  • JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS 2017 09 : 031-1~031-10
Non-parametric reconstruction methods, such as Gaussian process (GP) regression, provide a model-independent way of estimating an underlying function and its uncertainty from noisy data. We demonstrate how GP-reconstruction can be used as a consistency test between a given data set and a specific model by looking for structures in the residuals of the data with respect to the model's best-fit. Applying this formalism to the Planck temperature and polarisation power spectrum measurements, we test their global consistency with the predictions of the base ΛCDM model. Our results do not show any serious inconsistencies, lending further support to the interpretation of the base ΛCDM model as cosmology's gold standard.