Baryon Acoustic Oscillations with Cosmic Voids


Baryon Acoustic Oscillations with galaxies, combined  with Cosmic Microwave Background data (in the framework of the Friedman-Lemaitre-Robertson-Walker solution to Einstein's General Relativity) provide today the most precise  determination of cosmological parameters.

The Universe is a big expanding Void in which  matter, dark and luminous has grown from initial density perturbations to the observed pattern in the sky. Galaxies as observed in redshift space, display a web-like structure, the Cosmic Web, with clusters, filaments, sheets and voids.

I will discuss our evidence for a Baryonic  Acoustic Oscillation signal with voids from SDSS BOSS data, and how we can  combine with  galaxy information to improve cosmological parameter determination.


Mardi, 4 avril, 2017 - 11:00 to 13:00

Salle / Local: 

454A Condorcet

Nom/Prénom // Last name/First name: 

Charling Tao


CPPM/IN2P3, Tsinghua Center for Astrophysics

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