Colloquium
Measuring Dark Energy with Massive Redshift Surveys
Abstract
The Baryon Oscillation Spectroscopic Survey (BOSS) is a Stage III dark energy experiment on the Sloan Telescope. For the five years from 2009-2014, we are mapping 1.5 million galaxies at z<0.7. A simultaneous survey of 160,000 QSOs is mapping the hydrogen gas in absorption at redshifts 2 < z < 3. BOSS will provide the definitive measurement of the low redshift (z<0.7) BAO distance scale, and it will pioneer a powerful new method of measuring BAO at high redshift. BigBOSS is a proposed Stage IV dark energy experiment that will extend this map to 20 million galaxies over 14,000 deg2 to z=1.7. I will describe this survey and its technical status.
About the talk
Lawrence Berkeley National Laboratory, USA
For more details see BigBOSS
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About the speaker
David Schlegel is a Berkeley Lab astrophysicist and the principal investigator of the Big Baryon Oscillation Spectroscopic Survey (BigBOSS), the largest of four night-sky surveys being conducted in the third phase of the Sloan Digital Sky Survey, known as SDSS-III. He wrote the SDSS spectroscopic reduction pipeline with Scott Burles (2000-2002), providing the reduced data for all eight SDSS data releases from 2001 through 2008.
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