The Cosmic Infrared Background as a window into primordial non Gaussianity

by Vincent Desjacques

at Astrophysics and Cosmology Seminar

Wed, 09 Jan 2019, 11:10
Physics building (#54) room 207

Abstract

In cosmic microwave background CMB experiments the cosmic infrared background CIB produced by unresolved high redshift galaxies is treated as a nuisance that must be subtracted from the data In this talk I will demonstrate that the CIB encodes interesting cosmological information and in particular is a sensitive probe of inflationary non Gaussianities Although galactic dust dominates over the inflationary signal I will show that it is possible to mitigate the dust contamination with enough frequency channels especially if high frequencies such as the Planck 857 GHz channel are available Future space missions should be able to probe the local bispectrum shape down to an amplitude fNL lt 1 I will also illustrate how such a multi frequency approach can be tested with synthetic maps of the microwave sky

Created on 22-02-2019 by Bar Lev, Yevgeny (ybarlev)
Updaded on 22-02-2019 by Bar Lev, Yevgeny (ybarlev)