Exploration of different CIB models and impact of the SZ prior. Left panel: we present the joint exploration of the ΛCDM and different foreground parameters and in the right panel, the same when also opening up the AL parameter. In those tests we only use the Planck TT+lowE likelihoods. The baseline model correspond to the one-plus-two halo model (1h2h) described in Planck Collaboration XXX (2014), which further predicts the CIB emission law. We explore cases where the model template is replaced by a power law and where the SED is freely fitted. We further test the impact of relaxing the SZ prior. In all cases, the cosmological parameters are found to be robust to variations of the foreground model, including when opening up the AL parameter.
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