ABS: an Analytical method of Blind Separation of CMB from foregrounds
arXiv:1608.03707
Abstract
Extracting CMB B-mode polarization from complicated foregrounds is a challenging task in searching for inflationary gravitational waves. We propose the ABS method as a blind and analytical solution to this problem. It applies to the measured cross bandpower between different frequency bands and obtains the CMB B-mode bandpower analytically. It does not rely on assumptions of foregrounds and does not require multiple parameter fitting. Testing against a variety of foregrounds, survey frequency configurations and instrument noise, we verify its applicability and numerical stability. The ABS method also applies to CMB temperature, E-mode polarization, the thermal Sunyaev Zel'dovich effect, spectral distortion, and even significantly different problems such as cosmic magnification.
12 pages, 10 figures. MNRAS, in press
References in corpus (6)
- CMB-S4 Science Book, First Edition
- BICEP3 performance overview and planned Keck Array upgrade
- The Primordial Inflation Polarization Explorer (PIPER)
- The Experimental Probe of Inflationary Cosmology (EPIC): A Mission Concept Study for NASA's Einstein Inflation Probe
- Line-of-Sight Extrapolation Noise in Dust Polarization
- CMB Power Spectrum Likelihood with ILC