A Spectroscopic Road Map for Cosmic Frontier: DESI, DESI-II, Stage-5

David J. Schlegel , Simone Ferraro , Greg Aldering , Charles Baltay , Segev Benzvi , Robert Besuner , Guillermo A. Blanc , Adam S. Bolton , Ana Bonaca , David Brooks , Elizabeth Buckley-Geer , Zheng Cai , Joseph Derose , Arjun Dey , Peter Doel , Alex Drlica-Wagner , Xiaohui Fan , Gaston Gutierrez , Daniel Green , Julien Guy , Dragan Huterer , Leopoldo Infante , Patrick Jelinsky , Dionysios Karagiannis , Stephen M. Kent , Alex G. Kim , Jean-Paul Kneib , Juna A. Kollmeier , Anthony Kremin , Ofer Lahav , Martin Landriau , Dustin Lang , Alexie Leauthaud , Michael E. Levi , Eric V. Linder , Christophe Magneville (1) , Paul Martini , Patrick Mcdonald , Christopher J. Miller , Adam D. Myers , Jeffrey A. Newman , Peter E. Nugent , Nathalie Palanque-Delabrouille (1) , Nikhil Padmanabhan , Antonella Palmese , Claire Poppett , Jason X. Prochaska , Anand Raichoor , Solange Ramirez , Noah Sailer , Emmanuel Schaan , Michael Schubnell , Uros Seljak , Hee-Jong Seo , Joseph Silber , Joshua D. Simon , Zachary Slepian , Marcelle Soares-Santos , Greg Tarlé , Monica Valluri , Noah J. Weaverdyck , Risa H. Wechsler , Martin White , Christophe Yèche (1) , Rongpu Zhou , Douglas Finkbeiner , Satya Gontcho A. Gontcho , John Moustakas , Ashley J. Ross , Lado Samushia , Dennis Zaritsky

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

In this white paper, we present an experimental road map for spectroscopic experiments beyond DESI. DESI will be a transformative cosmological survey in the 2020s, mapping 40 million galaxies and quasars and capturing a significant fraction of the available linear modes up to z=1.2. DESI-II will pilot observations of galaxies both at much higher densities and extending to higher redshifts. A Stage-5 experiment would build out those high-density and high-redshift observations, mapping hundreds of millions of stars and galaxies in three dimensions, to address the problems of inflation, dark energy, light relativistic species, and dark matter. These spectroscopic data will also complement the next generation of weak lensing, line intensity mapping and CMB experiments and allow them to reach their full potential.

Mots clés: density: high; redshift: high; dimension: 3; DESI; galaxy; star; dark energy: density; dark matter: density; quasar; cosmic background radiation; lens; inflation: model

Domaines: Astrophysique [astro-ph]; Physique des Hautes Energies - Expérience [hep-ex]

David J. Schlegel, Simone Ferraro, Greg Aldering, Charles Baltay, Segev Benzvi, et al.. A Spectroscopic Road Map for Cosmic Frontier: DESI, DESI-II, Stage-5. Snowmass 2021, Jul 2022, Seattle, United States. ⟨hal-03790715⟩