학술논문
Preliminary Target Selection for the DESI Emission Line Galaxy (ELG) Sample
Document Type
article
Author
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
Source
Research Notes of the AAS. 4(10)
Subject
Language
Abstract
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−2, with ∼65% of ELG redshifts reliably within a redshift range of 0.6