Physics @ Berkeley
Events in Physics
Title: Constraining New Physics With The DEEP 2 Redshift Survey    (Colloquia)
Start Date: 12/05/2005
Time: 4:30 pm
Location: 1 LeConte Hall
Speaker: Jeffrey Newman
Affiliation: Hubble Fellow, Lawrence Berkeley National Laboratory
Contact Person: K. Lee   (510) 642-3034
Details:

Over the last three years, the DEEP2 Redshift Survey has obtained spectra of nearly 50,000 galaxies at high redshift to study the evolution of galaxies and the large-scale structure of the Universe.  We have now used a subset of this data to perform a robust test for changes in the value of the fine structure constant, alpha, over the last 7 billion years by measuring the wavelength separation of a doublet of emission lines produced by twice-ionized oxygen.  In addition, we take advantage of the fact that DEEP2 surveys four widely-separated regions of sky to test for spatial variation in alpha at constant time.  Finally, I will discuss the use of DEEP2 data to measure the dark energy equation of state parameter, w, by measuring the abundance of galaxy groups and clusters at high redshift.