摘要

Measurements of CMB anisotropy radiation have become some of the most fundamental tools in cosmology. In particular, considerable attention has been focused on the search for B-mode polarization, which has the potential to understand the extremely early universe. Interferometers are a more natural choice for measuring the CMB power spectrum and would provide better control of systematics than traditional imaging systems. In this concern, we presented a Gibbs-sampling method for Bayesian inference of power spectra and signal reconstruction from interferometric data of the CMB polarization signal, which provides an efficient method for analyzing cosmology observations with a reasonable computational complexity. I will review the above topics in this talk.
 

报告人简介

Dr. Le Zhang is a research associate at the University of Wisconsin-Madison from 2011, working on CMB B-mode experiments and the 21-cm tomography. He obtained the PhD from the University of Hamburg in November 2010. During his PhD research, he worked on spectral and anisotropy signatures of annihilating/decaying dark matter in astrophysical backgrounds and the related cosmological constraints. After he moved to the UW-Madison, Dr. Zhang mainly focused on interferometric CMB observations and 21-cm foreground removal, as well as on image reconstruction from interferometric data.