IRAP > Séminaires > Calendrier des séminaires > Cosmology with the Nearby Universe through full statistical non-linear reconstruction of wide galaxy surveys

Cosmology with the Nearby Universe through full statistical non-linear reconstruction of wide galaxy surveys

Séminaire le 08 juin 2017 de 11h00 à 12h00

Intervenant : Guilhem Lavaux

IAP

Salle Coriolis Salle Coriolis Observatoire Midi-Pyrénées - 14, avenue Edouard Belin - 31400 Toulouse

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We have entered an era of data rich cosmology. The Planck mission has provided with amazing constraints on the physical content and properties of the Universe. As new galaxy wide surveys are becoming available, such as the Sloan Digital Sky Survey (SDSS) and soon the Dark Energy Survey (DES), we are facing an avalanche of data that we are not yet capable of analyzing fully nor even correctly.

In this talk I will present new statistical methods to try toaddress the two above shortcomings. These methods are based on a full, robust, forward modeling of the matter on large scales from the initial conditions to the present observables. I will present the framework and the most recent results that we have obtained on mock and real data of galaxy spectroscopic surveys.

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