Optimizing blind reconstruction of CMB B-modes for future experiments - INSPIRE

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Optimizing blind reconstruction of CMB B-modes for future experiments

Alessandro Carones

May 28, 2024

Contribution to:

- Moriond Cosmology 2024

e-Print:

2406.15435 [astro-ph.CO]

View in:

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Abstract: (arXiv)

The detection of primordial polarization

B

modes of the Cosmic Microwave Background (CMB) requires exquisite control of Galactic foreground contamination. The Needlet Internal Linear Combination (NILC) method has proven effective in reconstructing CMB

B

modes without suffering from mis-modeling errors of Galactic emission. However, with the most complex foreground models, residual Galactic contamination from NILC is proved to bias, especially at large angular scales, the recovered CMB

B

modes from simulated data of future CMB experiments. We therefore present two new extensions of NILC, Multi-Clustering NILC (MC-NILC) and optimized constrained Moment ILC (ocMILC), which allow to enhance foreground subtraction in the reconstructed CMB signal.

Note:

contribution to the 2024 Cosmology session of the 58th Rencontres de Moriond

References(9)

Figures(2)

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