J. Colin Hill

Prospects for Measuring Cosmic Microwave Background Spectral Distortions in the Presence of Foregrounds

Measurements of cosmic microwave background spectral distortions have profound implications for our understanding of physical processes taking place over a vast window in cosmological history. Foreground contamination is unavoidable in such measurements and detailed signal-foreground separation will be necessary to extract cosmological science. We present MCMC-based spectral distortion detection forecasts in the presence of Galactic and extragalactic foregrounds for a range of possible experimental configurations, focusing on the Primordial Inflation Explorer (PIXIE) as a fiducial concept. We consider modifications to the baseline PIXIE mission (operating 12 months in distortion mode), searching for optimal configurations using a Fisher approach. Using only spectral information, we forecast an extended PIXIE mission to detect the expected average non-relativistic and relativistic thermal Sunyaev-Zeldovich distortions at high significance (194

Multi-tracer CMB delensing maps from Planck and WISE data

\sigma

Methods for Rapidly Processing Angular Masks of Next-Generation Galaxy Surveys

and 11

Can early dark energy explain EDGES

\sigma

Bias to CMB lensing reconstruction from temperature anisotropies due to large-scale galaxy motions

, respectively), even in the presence of foregrounds. The

On the effect of non-Gaussian lensing deflections on CMB lensing measurements

\Lambda

Mitigating foreground biases in CMB lensing reconstruction using cleaned gradients

CDM Silk damping

Foreground Biases on Primordial Non-Gaussianity Measurements from the CMB Temperature Bispectrum: Implications for Planck and Beyond

\mu

Two-halo term in stacked thermal Sunyaev-Zel’dovich measurements: Implications for self-similarity

-type distortion is not detected without additional modifications of the instrument or external data. Galactic synchrotron radiation is the most problematic source of contamination in this respect, an issue that could be mitigated by combining PIXIE data with future ground-based observations at low frequencies (

Taking the Universe's Temperature with PIXIE

\nu < 15-30