13-18 December 2015
International Conference Centre Geneva
Europe/Zurich timezone

High redshift BAO from BOSS to eBOSS

14 Dec 2015, 14:00
27m
Level 2, Room 14 (International Conference Centre Geneva)

Level 2, Room 14

International Conference Centre Geneva

17 Rue de Varembé, 1211 Geneva

Speaker

Dr Timothée Delubac (Ecole Polytechnique Fédérale de Lausanne)

Description

The first detection of Baryon Acoustic Oscillations (BAO) in the correlation function of the galaxy density field by Eisenstein et al. (2005) and Cole et al. (2005) set a milestone in the era of precision cosmology, providing a new, independent method for the measurement of cosmological distances. The Baryon Oscillation Spectroscopic Survey (BOSS), one of the experiment of the third generation of the Sloan Digital Sky Survey (SDSS-III), produced the first high redshift (z=2.34) measurement of the BAO scale using the Lyman-alpha forest of quasars as a tracer of the underlying matter density field (Delubac et al. 2015). During this talk, I will review the analysis that led to this measurement as well as present new results using the final dataset of BOSS. I will present the cosmological implications of this measurement when combined with other results (Aubourg et al. 2015) including constraints on the Dark Energy. I will pursue by introducing the extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the fourth generation of the SDSS (SDSS-IV) that uses the same facility as BOSS, and show how it will tighten the constraints on our cosmological model.
Collaboration BOSS and eBOSS collaborations

Primary author

Dr Timothée Delubac (Ecole Polytechnique Fédérale de Lausanne)

Presentation Materials