Preliminary Target Selection for the DESI Luminous Red Galaxy (LRG) Sample

Rongpu Zhou , Jeffrey A. Newman , Kyle S. Dawson , Daniel J. Eisenstein , David D. Brooks , Arjun Dey , Biprateep Dey , Yutong Duan , Sarah Eftekharzadeh , Enrique Gaztañaga , Robert Kehoe , Martin Landriau , Michael E. Levi , Timothy C. Licquia , Aaron M. Meisner , John Moustakas , Adam D. Myers , Nathalie Palanque-Delabrouille (1) , Claire Poppett , Francisco Prada , Anand Raichoor , David J. Schlegel , Michael Schubnell , Ryan Staten , Gregory Tarlé , Christophe Yèche (1)

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

The DESI survey will observe more than 8 million candidate luminous red galaxies (LRGs) in the redshift range 0.3 < z < 1.0. Here we present a preliminary version of the DESI LRG target section developed using Legacy Surveys Data Release 8 g, r, z and W1 photometry. This selection yields a sample with a uniform surface density of ~600 deg−2 and very low predicted stellar contamination and redshift failure rates. During DESI Survey Validation, updated versions of this selection will be tested and optimized.

Domaines: Astrophysique [astro-ph]

Rongpu Zhou, Jeffrey A. Newman, Kyle S. Dawson, Daniel J. Eisenstein, David D. Brooks, et al.. Preliminary Target Selection for the DESI Luminous Red Galaxy (LRG) Sample. Res.Notes AAS, 2020, 4 (10), pp.181. ⟨10.3847/2515-5172/abc0f4⟩. ⟨hal-02999609⟩