Speaker:
Nic Ross
Institution:
Lawrence Berkeley Nat Lab
Speaker Link:
Date:
Tuesday, April 17, 2012
Time:
4:00 pm
Location:
NS2 1201
ABSTRACT:
The Baryon Oscillation Spectroscopic Survey (BOSS) is part of the third incarnation of the Sloan Digital Sky Survey, and is performing a massive spectroscopic galaxy and quasar
redshift survey across 10,000deg2 of the Northern Sky.
BOSS is a cosmology experiment designed to study the large-scale structure (LSS) of the Universe at distinct cosmological epochs, z=0.3, 0.6 and 2.5. The high-z measurement will be made pioneering a new technique using z=2.2-3.5 quasars as "backlights" in order to map the intervening neutral hydrogen in absorption.
In this talk I'll give a brief background to the BOSS and report on the recent science results from the Data Release Nine (DR9) dataset.
These will include:
- The detection of BAO in the galaxy distribution at z~0.6
- The associated cosmological constraints
- An update on the z>2 BOSS Quasar Survey
- New measurements of quasar clustering and luminosity function
- BAL Disappearance and high-z Type II Quasars.
If time, connections will also be made for the quasar population to the new WISE mid-infrared and Herschel far-infrared measurements. The BOSS DR9 dataset will become public in July 2012.
Host:
James Bullock