Preliminary Target Selection for the DESI Luminous Red Galaxy (LRG) Sample,Research Notes of the AAS

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Preliminary Target Selection for the DESI Luminous Red Galaxy (LRG) Sample
Research Notes of the AAS Pub Date : 2020-10-15 , DOI: 10.3847/2515-5172/abc0f4
Rongpu Zhou _{1,

2} , Jeffrey A. Newman ₂ , Kyle S. Dawson ₃ , Daniel J. Eisenstein ₄ , David D. Brooks ₅ , Arjun Dey ₆ , Biprateep Dey ₂ , Yutong Duan ₇ , Sarah Eftekharzadeh ₈ , Enrique Gaztaaga _{9,

10} , Robert Kehoe ₁₁ , Martin Landriau ₁ , Michael E. Levi ₁ , Timothy C. Licquia _{2,

12} , Aaron M. Meisner ₆ , John Moustakas ₁₃ , Adam D. Myers ₁₄ , Nathalie Palanque-Delabrouille ₁₅ , Claire Poppett ₁₆ , Francisco Prada ₁₇ , Anand Raichoor ₁₈ , David J. Schlegel ₁ , Michael Schubnell ₁₉ , Ryan Staten ₁₁ , Gregory Tarl ₂₀ , Christophe Yche ₁₅

Affiliation

Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
University of Pittsburgh, 100 Allen Hall, 3941 O’Hara St., Pittsburgh, PA 15260, USA
Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA
Harvard-Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138, USA
Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
NSF’s National Optical-Infrared Astronomy Research Laboratory, 950 N. Cherry Ave., Tucson, AZ 85719, USA
Physics Department, Boston University, Boston, MA 02215, MA, USA
Department of Physics and Astronomy, The University of Utah, 115 South 1400 East, Salt Lake City, UT 84112, USA
Institute of Space Sciences (ICE, CSIC), E-08193 Barcelona, Spain
Institut dstudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain
Department of Physics, Southern Methodist University, 3215 Daniel Avenue, Dallas, TX 75275, USA
Dow Chemical Company, 2200 W. Salzburg Road, PO Box 994, Auburn, MI 48611, USA
Department of Physics & Astronomy, Siena College, 515 Loudon Road, Loudonville, NY 12211, USA
University of Wyoming, 1000 E. University Ave., Laramie, WY 82071, USA
IRFU, CEA, Universit Paris-Saclay, F-91191 Gif-sur-Yvette, France
Space Sciences Laboratory at University of California, 7 Gauss Way, Berkeley, CA 94720, USA
Instituto de Astrofisica de Andaluca, Glorieta de la Astronoma, s/n, E-18008 Granada, Spain
Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fdrale de Lausanne (EPFL), Observatoire de Sauverny, 1290 Versoix, Switzerland
Department of Physics, University of Michigan, 450 Church St., Ann Arbor, MI 48109, USA
Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA

The DESI survey will observe more than 8 million candidate luminous red galaxies (LRGs) in the redshift range 0.3<z<1.0. Here we present a preliminary version of the DESI LRG target section developed using Legacy Surveys Data Release 8 g, r, z and W1 photometry. This selection yields a sample with a uniform surface density of ∼600 deg⁻² and very low predicted stellar contamination and redshift failure rates. During DESI Survey Validation, updated versions of this selection will be tested and optimized.

中文翻译：

DESI 发光红星系 (LRG) 样本的初步目标选择

DESI 调查将在红移范围 0.3< z <1.0内观察超过 800 万个候选发光红色星系 (LRG) 。在这里，我们展示了使用 Legacy Surveys Data Release 8 g、r、z和W 1 光度测量开发的 DESI LRG 目标部分的初步版本。这种选择产生的样品具有约 600 度^-2的均匀表面密度和非常低的预测恒星污染和红移故障率。在 DESI 调查验证期间，将测试和优化此选择的更新版本。

更新日期：2020-10-15

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