CMB Power Spectrum Likelihood with ILC

Details CMB Power Spectrum Likelihood with ILC CMB Power Spectrum Likelihood with ILC

2012-03-21

arxiv.org/abs/1203.4837v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 4 figures, submitted to MNRAS

Scientific paper

We extend the ILC method in harmonic space to include the error in its CMB estimate. This allows parameter estimation routines to take into account the effect of the foregrounds as well as the errors in their subtraction in conjunction with the ILC method. Our method requires the use of a model of the foregrounds which we do not develop here. The reduction of the foreground level makes this method less sensitive to unaccounted for errors in the foreground model. Simulations are used to validate the calculations and approximations used in generating this likelihood function.

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