Particle Physics Seminar

"Measurements of Non-Gaussianity And the CIB Fluctuations High Redshift"

Presented by Joseph Smidt, UC Irvine

Tuesday, January 17, 2012, 3:00 pm — Small Seminar Room, Bldg. 510

Background fluctuation analysis of both the Cosmic Microwave Background (CMB) and Cosmic Infrared Background (CIB) stand to teach much concerning physics at the early stages of the universe. If the CMB were a purely Gaussian field, all statistical information would be contained in the power spectrum or two-point correlation function. However, non-Gaussianities ensure that new physics may be extracted from higher n-point correlation functions including the bispectrum and trispectrum of the CMB. In this talk I will discuss new estimators we have formulated to probe primordial non-Gaussianity in the bispectrum and
trispectrum of CMB data and the constraints we have made using WMAP data while discussing implications for inflationary models. I will also discuss how these same
methods may be used to probe CMB Lensing. Finally, I will discuss how upcoming measurements of near-infrared CIB fluctuations may be used to constrain the redshift of reionization, the metalicities of these primordial sources and the efficiency of star formation at these early epochs among other things. Some preliminary results involving Spitzer SDWFS data will also be discussed.

Hosted by: Anze Slosar

7896  |  INT/EXT  |  Events Calendar