论文标题
DESI明亮星系调查（BGS）的初步目标选择
Preliminary Target Selection for the DESI Bright Galaxy Survey (BGS)
论文作者
论文摘要
暗能量光谱仪器（DESI）将对低红移星系进行近乎限制的调查（$ 0.05 \ leq z \ leq 0.4 $，中位数$ z \ of约0.2 $）。该明亮的星系调查（BGS）的聚类分析将在低红移时产生最精确的测量结果。 DESI BGS将包括两个目标类：（i）Bright（$ r <19.5 $ 〜MAG）和（ii）微弱（$ 19.5 <r <20 $ 〜mag）。在这里，我们介绍了恒星 - 半分离的摘要，以及在BGS中使用的不同光度和几何面膜，以减少伪靶标的数量。选择的总密度为$ \ sim 800 $对象/度$^2 $，$ \ sim 600 $ objects/ver $^2 $对于微弱的选择。可以在Ruiz-Macias等人中找到BGS选择的完整表征。 （2020）。
The Dark Energy Spectroscopic Instrument (DESI) will execute a nearly magnitude-limited survey of low redshift galaxies ($0.05 \leq z \leq 0.4$, median $z \approx 0.2$). Clustering analyses of this Bright Galaxy Survey (BGS) will yield the most precise measurements to date of baryon acoustic oscillations and redshift-space distortions at low redshift. DESI BGS will comprise two target classes: (i) BRIGHT ($r<19.5$~mag), and (ii) FAINT ($19.5<r<20$~mag). Here we present a summary of the star-galaxy separation, and different photometric and geometrical masks, used in BGS to reduce the number of spurious targets. The selection results in a total density of $\sim 800$ objects/deg$^2$ for the BRIGHT and $\sim 600$ objects/deg$^2$ for the FAINT selections.A full characterization of the BGS selection can be found in Ruiz-Macias et al. (2020).
