Baryon Acoustic Oscillations with Cosmic Voids

start date: 

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

Place: 

454A Condorcet

Speaker: 

Charling Tao

Home Institute: 

CPPM/IN2P3, Tsinghua Center for Astrophysics

organized by: 

 

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.

Slide en PDF: