Cosmological Parameter Estimation with Galaxy Number Counts- Enea di Dio

Monday 27 Oct 2014, 11:00 → 12:00 Europe/Brussels

E/1st floor-E.161 - Meeting room (E.161) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

I will show that in galaxy catalogs we can recover the same information of the 3D matter power spectrum by using redshift dependent angular power spectra. Contrarily to the 3D analysis, the 2D-tomography analysis is model independent and directly observable. All the results have been obtained using CLASSgal, a code made publicly available and merged now with CLASS, which computes, accurately and efficiently, the galaxy number fluctuations in linear perturbation theory, including all relativistic corrections. I will also present the relevant contributions to the bi-spectrum, computed from the galaxy number counts to second order.