Natalie Roe

Natalie Roe


Lawrence Berkeley National Lab


Monday, October 18, 2010

4:00 p.m.

Cardwell 102


A Cosmological Ruler for Dark Energy


The problem of measuring distances in astronomy has been a challenge to generations of astronomers.  A promising new technique called baryon acoustic oscillations measure the ripples in the distribution of matter that were imprinted when the universe was still a hot, dense plasma.  I will describe an experiment to measure these so-called baryon acoustic oscillations called BOSS - Baryon Oscillation Spectroscopic Survey.  BOSS has just completed the first year of a planned five year survey at the Sloan telescope in Apache Point, New Mexico.  I will also mention a follow-on next generation project called BigBOSS.