论文标题
DESI发射线星系（ELG）样品的初步目标选择
Preliminary Target Selection for the DESI Emission Line Galaxy (ELG) Sample
论文作者
论文摘要
DESI将通过收集$ 3500万美元的$ \ sim $ 80％的宇宙历史和三分之一的天空来研究Baryon声学振荡（BAO）和RedShift Space扭曲（RSD），从而精确地限制了宇宙扩张和结构增长。我们为发射线星系（ELG）样品提供了初步的目标选择，该目标将占所有DESI示踪剂的一半。选择由$ g $ - 带幅度剪切和$（g-r）$ vs. $（r-z）$颜色盒组成，我们使用HSC/pdr2光度光度红移和DEEP2光谱验证了$（R-Z）$。 ELG目标密度应为$ \ sim $ 2400度$^{ - 2} $，$ \ sim $ \ sim $ 65％的ELG RedShifts可靠地在$ 0.6 <z <z <1.6 $的红移范围内可靠。 ELG针对DESI的目标将在“调查验证”阶段完成。
DESI will precisely constrain cosmic expansion and the growth of structure by collecting $\sim$35 million redshifts across $\sim$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 $(g-r)$ vs. $(r-z)$ color box, which we validate using HSC/PDR2 photometric redshifts and DEEP2 spectroscopy. The ELG target density should be $\sim$2400 deg$^{-2}$, with $\sim$65% of ELG redshifts reliably within a redshift range of $0.6<z<1.6$. ELG targeting for DESI will be finalized during a `Survey Validation' phase.
