Orateur
Description
Rayleigh scattering of the Cosmic Microwave Background (CMB) is a less studied yet potentially powerful probe of the recombination history. Scattering of CMB photons off neutral species right after recombination presents a distinctive $\nu^4$ scaling with frequency as well as a strong correlation with the primary CMB. These unique features should facilitate its detection by the next generation of CMB experiments. We will present detectability forecasts combining the Simons Observatory and CCAT experiments, two ground based observatories currently under construction, as well as more futuristic space missions. We will present potential cosmological implications of the detection of this signal. Finally, we will assess the impact of foreground contamination and instrumental systematics on the detectability of the Rayleigh scattering signal.
