Unveiling acoustic physics of the CMB using nonparametric estimation of the temperature angular power spectrum for Planck

Understand

Estimation of the angular power spectrum is one of the important steps in Cosmic Microwave Background (CMB) data analysis.

• Here, we present a nonparametric estimate of the temperature angular power spectrum for the Planck 2013 CMB data.
• The method implemented in this work is model-independent, and allows the data, rather than the model, to dictate the fit.
• Since one of the main targets of our analysis is to test the consistency of the $\Lambda$CDM model with Planck 2013 data, we use the nuisance parameters associated with the best-fit $\Lambda$CDM angular power spectrum to remove foreground contributions from the data at multipoles $\ell \geq50$.