Michael Levi, Chris Bebek, Timothy Beers, Robert Blum, Robert Cahn, Daniel Eisenstein, Brenna Flaugher, Klaus Honscheid, Richard Kron, Ofer Lahav, Patrick McDonald, Natalie Roe, David Schlegel, representing the DESI collaboration
The Dark Energy Spectroscopic Instrument (DESI) is a massively multiplexed fiber-fed spectrograph that will make the next major advance in dark energy in the timeframe 2018-2022. On the Mayall telescope, DESI will obtain spectra and redshifts for at least 18 million emission-line galaxies, 4 million luminous red galaxies and 3 million quasi-stellar objects, in order to: probe the effects of dark energy on the expansion history using baryon acoustic oscillations (BAO), measure the gravitational growth history through redshift-space distortions, measure the sum of neutrino masses, and investigate the signatures of primordial inflation. The resulting 3-D galaxy maps at z<2 and Lyman-alpha forest at z>2 will make 1%-level measurements of the distance scale in 35 redshift bins, thus providing unprecedented constraints on cosmological models.
View original:
http://arxiv.org/abs/1308.0847
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