The DESI Experiment Part I: Science,Targeting, and Survey Design

By Desi Collaboration Amir Aghamousa, J. Aguilar, S. Ahlen, Shadab Alam, L. Allen, C. Allende Prieto, James Annis, S. Bailey, C. Balland, O. Ballester and 282 more. 2016

1,247 citations recorded by the source corpus.

DESI (Dark Energy Spectroscopic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations (BAO) and the growth of structure through redshift-space distortions with a wide-area galaxy and quasar redshift survey. To trace the underlying dark matter distribution, spectroscopic targets will be selected in four classes from imaging data. We will measure luminous red galaxies up to $z=1.0$. To probe the Universe out to even higher redshift, DESI will target bright [O II] emission line galaxies up to $z=1.7$. Quasars will be targeted both as direct tracers of the underlying dark matter distribution and, at higher redshifts ($ 2.1 < z < 3.5$), for the Ly-$\alpha$ forest absorption features in their spectra, which will be used to trace the distribution of neutral hydrogen. When moonlight prevents efficient observations of the faint targets of the baseline survey, DESI will conduct a magnitude-limited Bright Galaxy Survey comprising approximately 10 million galaxies with a median $z\approx 0.2$. In total, more than 30 million galaxy and quasar redshifts will be obtained to measure the BAO feature and determine the matter power spectrum, including redshift space distortions.

Subfields: Astronomy and Astrophysics, Instrumentation, Statistical and Nonlinear Physics

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In Astronomy and Astrophysics

1. Andrey V. Kravtsov
2. Volker Springel
3. Will J. Percival
4. M. White
5. S. Allen
6. L. Hernquist
7. S. Vagnozzi
8. M. Zaldarriaga

In Instrumentation

1. M. White
2. Andrey V. Kravtsov
3. A. Mantz
4. S. Allen
5. Will J. Percival
6. Katrin Heitmann
7. Salman Habib
8. D. Green

In Statistical and Nonlinear Physics

1. V. Poulin
2. E. di Valentino
3. Tanvi Karwal
4. Salman Habib
5. Katrin Heitmann
6. John C. Hill
7. Tristan L. Smith
8. R. Somerville

Citations in the corpus

• Recent Progress in the Physics of Axions and Axion-Like Particles (2020, background): “The effects of axion DM on small scales are still significantly constrained by Lyman-α forest data [73, 74] and by the evolution of dwarf galaxy Eridanus II [75], extending the excluded region up to ma .”
• The Ups and Downs of Early Dark Energy solutions to the Hubble tension: A review of models, hints and constraints circa 2023 (2023, background): “Future constraints with DESI and subsequent surveys will be crucial to test EDE models further.”