1-5 July 2019
The University of Manchester
Europe/London timezone
- pascos2019@manchester.ac.uk
- +44 (0)161 275 4171
The Local Organising Committee
CMB Spectral Distortions: a Robust Probe of Primordial non-Gaussianity
Presented by Mr. Giovanni CABASS
on
1 Jul 2019
from
16:40
to
17:00
Session:
Parallel: Cosmological Probes
Track: Cosmological Probes
Content
Deviations of the CMB spectrum from a black-body are a powerful probe of the three-point function of curvature perturbations. Dissipation of acoustic waves in the photon-electron-baryon fluid heats the plasma: the heating is not balanced by an appropriate change in photon number, and a Bose-Einstein spectrum is formed. A non-zero three-point function of curvature perturbations makes the heating rate spatially dependent, so that the observed chemical potential in the sky will be anisotropic and correlated with large-scale temperature fluctuations.
In this talk I discuss how the angular correlation of temperature anisotropies and spectral distortions is insensitive to contamination from late-time projection effects (unlike other observables like the CMB temperature bispectrum), making it an excellent, albeit futuristic, probe of primordial non-Gaussianity.
Place
Location: Schuster
Room: Rutherford Lecture Theatre