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A Clash of Clusters Provides New Clue to Dark Matter
Special ACKS Seminar: Dragan Huterer
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ACKS Seminar: David Schlegel (Lawrence Berkeley National Laboratory)
| What | ACKS |
|---|---|
| When |
13 December 07 from 04:00 pm to 04:00 pm |
| Where | CAMPUS: Phys & Astrophys Bldg., 1st fl., conf rm (102/103) |
| Contact Name | Lukasz Stawarz |
| Contact Email | stawarz@slac.stanford.edu |
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State of the Art in Baryon Acoustic Oscillations
The imprint of sound waves on the distribution of matter in the Universe, a.k.a. baryon acoustic oscillations (BAO), provide a well-understood "standard ruler". This has become our newest tool for measuring the effects of dark energy on the expansion history of the Universe. I will review the current results from the Sloan Digital Sky Survey using both 3-D maps to z=0.4 and 2-D (photo-z) maps
to z=0.6. The Baryon Oscillation Spectroscopic Survey (BOSS) on the SDSS Telescope will map 1.5 million galaxies at z<0.7 and measure hydrogen absorption in 160,000 QSOs at z>2. This will provide the definitive measurement of the low-redshift BAO scale, and it will pioneer a powerful new method of measuring BAO at high redshifts.
MASS: Lance Simms