7-11 September 2015
Warsaw, Poland
Europe/Zurich timezone

Intensity Mapping and One-Point Statistics

8 Sep 2015, 14:40
Main Hall ()

Main Hall


Patrick Breysse (Johns Hopkins University, United States)


Intensity mapping is a promising new technique for studying the large-scale structure of the universe at redshifts inaccessible to traditional galaxy surveys. Intensity mapping studies typically focus on two-point statistics of a map such as the power spectrum. However, because these maps are highly non-Gaussian, there is a wealth of additional information which can be obtained by studying the one-point statistics. We illustrate this using a simple model of an intensity mapping survey targeting CO at redshift 3. Using a P(D) analysis, we demonstrate how to calculate the one-point PDF of a map from a galaxy luminosity function. We also study the effects of emission lines from foreground galaxies by considering a population of HCN emitting galaxies at redshift 2, and show that the one-point statistics can be used to recover information about the target CO population without resorting to cross-correlation studies. We then demonstrate how this one-point analysis can be used to break degeneracies present in the two-point statistics of an intensity map to obtain useful cosmological information.

Presentation Materials

Your browser is out of date!

If you are using Internet Explorer, please use Firefox, Chrome or Edge instead.

Otherwise, please update your browser to the latest version to use Indico without problems.