Current and future Cosmic Microwave Background (CMB) experiments target the measurement of the B-mode polarised signal, induced by primordial inflationary gravitational waves. Polarised Galactic foregrounds can bias this measurement and cause a false detection. Here we describe a robustness test for the validation of an eventual detection, using scattering transforms as statistical descriptor of component separated CMB maps. The proposed test is able to identify a false detection in ~90% of our simulations, in a realistic configuration.
B-sure: robustness tests for the detection of the tensor-to-scalar ratio from CMB observations / Ranucci, C., Pierre, S., Carones, A., Vacher, L., Krachmalnicoff, N., Allys, E., Baccigalupi, C.. - (2026). (Rencontres de Moriond 2026: Cosmology Session La Thuile, Italy ).
B-sure: robustness tests for the detection of the tensor-to-scalar ratio from CMB observations
Claudio Ranucci
;Alessandro Carones;Nicoletta Krachmalnicoff;Carlo Baccigalupi
2026-01-01
Abstract
Current and future Cosmic Microwave Background (CMB) experiments target the measurement of the B-mode polarised signal, induced by primordial inflationary gravitational waves. Polarised Galactic foregrounds can bias this measurement and cause a false detection. Here we describe a robustness test for the validation of an eventual detection, using scattering transforms as statistical descriptor of component separated CMB maps. The proposed test is able to identify a false detection in ~90% of our simulations, in a realistic configuration.| File | Dimensione | Formato | |
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