Nov. 27 , Thursday, at 15:30
Eric Gawiser, Rutgers University
Probing Dark Matter and Dark Energy with Distant Galaxies

I will describe how our understanding of cosmological structure formation is used to probe the dark matter properties of high-redshift galaxies. The MUSYC collaboration studied the clustering properties and multiwavelength spectral energy distributions of 160 Lyman Alpha Emitting (LAE) galaxies at redshift 3.1. The LAEs were found to have dark matter masses of 10^11 solar masses. The evolution of galaxy clustering with redshift predicts that LAEs evolve into typical present-day (spiral) galaxies like the Milky Way. Other high-redshift galaxy populations, including Lyman Break Galaxies and Active Galactic Nuclei, typically evolve into more massive (elliptical) galaxies. I will discuss the expansion of these techniques planned by the HETDEX and LSST collaborations. From 2010-2013, the HETDEX experiment will discover one million Lyman Alpha Emitting galaxies and will use them to determine the dark energy equation-of-state through its influence on the observed scale of baryon acoustic oscillations seen in the matter power spectrum. Starting in 2014, the Large Synoptic Survey Telescope (LSST) will discover billions of high-redshift galaxies, allowing even more precise constraints on dark energy and dark matter, including the determination of neutrino masses. References: Gawiser et al. 2007 (Astrophysical Journal 671, 278), Francke et al. 2008 (Astrophysical Journal Letters 673, L13),,