The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation

The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation
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DOI：
10.3847/1538-3881/accff8
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发表时间：
2022-08
期刊：
The Astronomical Journal
影响因子：
--
通讯作者：
C. Hahn;Michael J. Wilson;O. Ruiz-Macias;S. Cole;D. Weinberg;J. Moustakas;A. Kremin;J. Tinker;Alex Smith;Risa Wechsler;S. Ahlen;S. Alam;S. Bailey;D. Brooks;A. Cooper;T. Davis;K. Dawson;A. Dey;B. Dey;S. Eftekharzadeh;D. Eisenstein;K. Fanning;J. Forero-Romero;C. Frenk;E. Gaztañaga;S. G. A Gontcho;J. Guy;K. Honscheid;M. Ishak;S. Juneau;R. Kehoe;T. Kisner;Ting-Wen Lan;M. Landriau;L. Le Guillou;M. Levi;C. Magneville;P. Martini;A. Meisner;A. Myers;J. Nie;P. Norberg;N. Palanque-Delabrouille;W. Percival;C. Poppett;F. Prada;A. Raichoor;A. Ross;S. Safonova;C. Saulder;E. Schlafly;D. Schlegel;D. Sierra-Porta;G. Tarlé;B. Weaver;C. Yéche;P. Zarrouk;R. Zhou;Zhi-min Zhou;H. Zou
C. Hahn;Michael J. Wilson;O. Ruiz-Macias;S. Cole;D. Weinberg;J. Moustakas;A. Kremin;J. Tinker;Alex Smith;Risa Wechsler;S. Ahlen;S. Alam;S. Bailey;D. Brooks;A. Cooper;T. Davis;K. Dawson;A. Dey;B. Dey;S. Eftekharzadeh;D. Eisenstein;K. Fanning;J. Forero-Romero;C. Frenk;E. Gaztañaga;S. G. A Gontcho;J. Guy;K. Honscheid;M. Ishak;S. Juneau;R. Kehoe;T. Kisner;Ting-Wen Lan;M. Landriau;L. Le Guillou;M. Levi;C. Magneville;P. Martini;A. Meisner;A. Myers;J. Nie;P. Norberg;N. Palanque-Delabrouille;W. Percival;C. Poppett;F. Prada;A. Raichoor;A. Ross;S. Safonova;C. Saulder;E. Schlafly;D. Schlegel;D. Sierra-Porta;G. Tarlé;B. Weaver;C. Yéche;P. Zarrouk;R. Zhou;Zhi-min Zhou;H. Zou
中科院分区：
其他
文献类型：
--
作者：
C. Hahn;Michael J. Wilson;O. Ruiz-Macias;S. Cole;D. Weinberg;J. Moustakas;A. Kremin;J. Tinker;Alex Smith;Risa Wechsler;S. Ahlen;S. Alam;S. Bailey;D. Brooks;A. Cooper;T. Davis;K. Dawson;A. Dey;B. Dey;S. Eftekharzadeh;D. Eisenstein;K. Fanning;J. Forero-Romero;C. Frenk;E. Gaztañaga;S. G. A Gontcho;J. Guy;K. Honscheid;M. Ishak;S. Juneau;R. Kehoe;T. Kisner;Ting-Wen Lan;M. Landriau;L. Le Guillou;M. Levi;C. Magneville;P. Martini;A. Meisner;A. Myers;J. Nie;P. Norberg;N. Palanque-Delabrouille;W. Percival;C. Poppett;F. Prada;A. Raichoor;A. Ross;S. Safonova;C. Saulder;E. Schlafly;D. Schlegel;D. Sierra-Porta;G. Tarlé;B. Weaver;C. Yéche;P. Zarrouk;R. Zhou;Zhi-min Zhou;H. Zou

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在接下来的5年里，暗能量光谱仪器（DESI）将在基特峰国家天文台的4米梅奥尔望远镜上使用10台光谱仪和5000根光纤，进行第一阶段第四阶段的暗能量星系调查。在z， 1000万个星系，面积14000平方度。在这项工作中，我们提出并验证了最终的BGS目标选择和调查设计。根据传统调查，BGS的目标是80%的光纤分配效率。最后，在任何观测条件下，BGS亮星和BGS暗星的红移成功率都将达到95%。BGS满足广泛的科学应用需求。BGS将在z < 0.4处产生最精确的重子声学振荡和红移空间畸变测量。它为需要高度完整和密集样本的新方法（例如，n点统计，多示踪剂）提供了机会。BGS进一步为研究星系群以及星系与暗物质之间的关系提供了有力的工具。
Over the next 5 yr, the Dark Energy Spectroscopic Instrument (DESI) will use 10 spectrographs with 5000 fibers on the 4 m Mayall Telescope at Kitt Peak National Observatory to conduct the first Stage IV dark energy galaxy survey. At z 10 million galaxies spanning 14,000 deg2. In this work, we present and validate the final BGS target selection and survey design. From the Legacy Surveys, BGS will target an r 80% fiber assignment efficiency. Finally, BGS Bright and BGS Faint will achieve >95% redshift success over any observing condition. BGS meets the requirements for an extensive range of scientific applications. BGS will yield the most precise baryon acoustic oscillation and redshift-space distortion measurements at z < 0.4. It presents opportunities for new methods that require highly complete and dense samples (e.g., N-point statistics, multitracers). BGS further provides a powerful tool to study galaxy populations and the relations between galaxies and dark matter.