Preliminary Target Selection for the DESI Emission Line Galaxy (ELG) Sample

DOI: 
10.3847/2515-5172/abc078
Publication date: 
03/10/2020
Main author: 
Raichoor, Anand
IAA authors: 
Prada, Francisco
Authors: 
Raichoor, Anand;Eisenstein, Daniel J.;Karim, Tanveer;Newman, Jeffrey A.;Moustakas, John;Brooks, David D.;Dawson, Kyle S.;Dey, Arjun;Duan, Yutong;Eftekharzadeh, Sarah;Gaztañaga, Enrique;Kehoe, Robert;Landriau, Martin;Lang, Dustin;Lee, Jae H.;Levi, Michael E.;Meisner, Aaron M.;Myers, Adam D.;Palanque-Delabrouille, Nathalie;Poppett, Claire;Prada, Francisco;Ross, Ashley J.;Schlegel, David J.;Schubnell, Michael;Staten, Ryan;Tarlé, Gregory;Tojeiro, Rita;Yèche, Christophe;Zhou, Rongpu
Journal: 
Research Notes of the American Astronomical Society
Refereed: 
No
Publication type: 
Note
Volume: 
4
Pages: 
180
Abstract: 
DESI will precisely constrain cosmic expansion and the growth of structure by collecting ∼35 million redshifts across ∼80% of cosmic history and one third of the sky to study Baryon Acoustic Oscillations (BAO) and Redshift Space Distortions (RSD). We present a preliminary target selection for an Emission Line Galaxy (ELG) sample, which will comprise about half of all DESI tracers. The selection consists of a g-band magnitude cut and a (g - r) versus (r - z) color box, which we validate using HSC/PDR2 photometric redshifts and DEEP2 spectroscopy. The ELG target density should be ∼2400 deg<SUP>-2</SUP>, with ∼65% of ELG redshifts reliably within a redshift range of 0.6 &lt; z &lt; 1.6. ELG targeting for DESI will be finalized during a "Survey Validation" phase.
Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2020RNAAS...4..180R/abstract
ADS Bibcode: 
2020RNAAS...4..180R
Keywords: 
Large-scale structure of the universe;Redshift surveys;Emission line galaxies;Observational cosmology;902;1378;459;1146;Astrophysics - Cosmology and Nongalactic Astrophysics