The Backup Program of the Dark Energy Spectroscopic Instrument's Milky Way Survey

Arjun Dey; Sergey E. Koposov; Joan R. Najita; Andrew P. Cooper; B. T. Gansicke; Adam D. Myers; A. Raichoor; Daniel J. Eisenstein; E. F. Schlafly; D. Schlegel; C. Allende Prieto; Leandro Beraldo E Silva; Ting S. Li; M. Valluri; Stephanie Juneau; Mika Lambert; S. Li; Guillaume F. Thomas; Wenting Wang; Alexander H. Riley; N. Kizhuprakkat; J. Aguilar; S. Ahlen; S. Bailey; D. Bianchi; D. Brooks; T. Claybaugh; A. Cuceu; A. de la Macorra; J. Della Costa; Biprateep Dey; P. Doel; A. Font-Ribera; J. E. Forero-Romero; E. Gaztanaga; S. Gontcho A Gontcho; G. Gutierrez; J. Guy; C. Hahn; K. Honscheid; M. Ishak; J. Jimenez; R. Kehoe; D. Kirkby; T. Kisner; A. Kremin; C. Lamman; M. Landriau; L. Le Guillou; M. E. Levi; M. Manera; P. Martini; A. Meisner; R. Miquel; J. Moustakas; S. Nadathur; N. Palanque-Delabrouille; W. J. Percival; I. Perez-Rafols; F. Prada; G. Rossi; E. Sanchez; M. Schubnell; J. Silber; D. Sprayberry; G. Tarle; B. A. Weaver; R. H. Wechsler; R. Zhou; H. Zou; Portsmouth U., ICG

doi:10.3847/1538-3881/ae5dd0

The Backup Program of the Dark Energy Spectroscopic Instrument's Milky Way Survey

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The Backup Program of the Dark Energy Spectroscopic Instrument's Milky Way Survey

Arjun Dey, Sergey E. Koposov, Joan R. Najita, Andrew P. Cooper, B. T. Gansicke, Adam D. Myers, A. Raichoor, Daniel J. Eisenstein, E. F. Schlafly, D. Schlegel, …

The Astronomical journal, 卷.171(6), 頁.348

01/06/2026

DOI: https://doi.org/10.3847/1538-3881/ae5dd0

Web of Science ID: WOS:001765069200001

摘要

Astronomy & Astrophysics

Physical Sciences

Science & Technology

The Milky Way Backup Program (MWBP), a survey currently underway with the Dark Energy Spectroscopic Instrument (DESI) on the Nicholas U. Mayall 4 m Telescope, works at the margins of the DESI Main surveys to obtain spectra of millions of additional stars from the Gaia catalog. Efficiently utilizing times between similar to 12 degrees and 18 degrees twilight and poor weather conditions, the MWBP extends the range of stellar sources studied to both brighter magnitudes and lower Galactic latitude and declination than the stars studied in DESI's Main Milky Way Survey. While the MWBP prioritizes candidate giant stars selected from the Gaia catalog (using color and parallax criteria), it also includes an unbiased sample of bright stars (i.e., 11.2 less than or similar to G < 16 mag) as well as fainter sources (to G less than or similar to 19 mag). As of 2025 March 1, the survey had obtained spectra of similar to 7 million stars, approximately 1.2 million of which are included in the DESI Data Release 1. The DESI spectra cover the wavelength range from 3600 to 9800 & Aring; at a resolution lambda/Delta lambda varying from 2000 to 5000. The full survey, when completed, will cover an area of more than 21,000 deg(2) and include approximately 10 million Gaia sources, roughly equal to the number of stellar spectra obtained through the DESI Main Survey, while only utilizing approximate to 9% of all DESI observing time. This paper provides an overview of the MWBP, describing the target selection, observing strategy, and an introduction to the resulting data.

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題名: The Backup Program of the Dark Energy Spectroscopic Instrument's Milky Way Survey
創作者：: Arjun Dey - NSF NOIRLab
Sergey E. Koposov - University of Cambridge
Joan R. Najita - NSF NOIRLab
Andrew P. Cooper - National Tsing Hua University
B. T. Gansicke - University of Warwick
Adam D. Myers - University of Wyoming
A. Raichoor - Lawrence Berkeley National Laboratory
Daniel J. Eisenstein - Center for Astrophysics Harvard & Smithsonian
E. F. Schlafly - Space Telescope Science Institute
D. Schlegel - Lawrence Berkeley National Laboratory
C. Allende Prieto - Inst Astrofis Canarias, C Via Lactea S-N, San Cristobal la Laguna 38205, Santa Cruz De T, Spain
Leandro Beraldo E Silva - University of Arizona
Ting S. Li - University of Toronto
M. Valluri - University of Michigan
Stephanie Juneau - NSF NOIRLab
Mika Lambert - Univ Calif Santa Cruz, Dept Astron & Astrophys, 1156 High St, Santa Cruz, CA 95064 USA
S. Li - Shanghai Jiao Tong University
Guillaume F. Thomas - Universidad de La Laguna
Wenting Wang - Shanghai Jiao Tong University
Alexander H. Riley - Durham University
N. Kizhuprakkat - National Tsing Hua University
J. Aguilar - Lawrence Berkeley National Laboratory
S. Ahlen - Boston University
S. Bailey - Lawrence Berkeley National Laboratory
D. Bianchi - University of Milan
D. Brooks - University College London
T. Claybaugh - Lawrence Berkeley National Laboratory
A. Cuceu - Lawrence Berkeley National Laboratory
A. de la Macorra - Universidad Nacional Autónoma de México
J. Della Costa - San Diego State University
Biprateep Dey - University of Pittsburgh
P. Doel - University College London
A. Font-Ribera - Barcelona Institute of Science and Technology
J. E. Forero-Romero - Universidad de Los Andes
E. Gaztanaga - Institut d'Estudis Espacials de Catalunya
S. Gontcho A Gontcho - Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA
G. Gutierrez - Fermi National Accelerator Laboratory
J. Guy - Lawrence Berkeley National Laboratory
C. Hahn - University of Arizona
K. Honscheid - The Ohio State University
M. Ishak - The University of Texas at Dallas
J. Jimenez - Barcelona Institute of Science and Technology
R. Kehoe - Southern Methodist University
D. Kirkby - Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
T. Kisner - Lawrence Berkeley National Laboratory
A. Kremin - Lawrence Berkeley National Laboratory
C. Lamman - Center for Astrophysics Harvard & Smithsonian
M. Landriau - Lawrence Berkeley National Laboratory
L. Le Guillou - Sorbonne Université
M. E. Levi - Lawrence Berkeley National Laboratory
M. Manera - Universitat Autònoma de Barcelona
P. Martini - The Ohio State University
A. Meisner - NSF NOIRLab
R. Miquel - Institució Catalana de Recerca i Estudis Avançats
J. Moustakas - Siena College
S. Nadathur - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
N. Palanque-Delabrouille - Lawrence Berkeley National Laboratory
W. J. Percival - University of Waterloo
I. Perez-Rafols - Universitat Politècnica de Catalunya
F. Prada - Instituto de Astrofísica de Andalucía
G. Rossi - Sejong University
E. Sanchez - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
M. Schubnell - University of Michigan
J. Silber - Lawrence Berkeley National Laboratory
D. Sprayberry - NSF NOIRLab
G. Tarle - University of Michigan
B. A. Weaver - NSF NOIRLab
R. H. Wechsler - SLAC National Accelerator Laboratory
R. Zhou - Lawrence Berkeley National Laboratory
H. Zou - Chinese Academy of Sciences
Portsmouth U., ICG
出版者: IOP Publishing Ltd
總頁數: 16
補助款備註: DE-AC02-05CH11231 / Department of Energy Office of Science; United States Department of Energy (DOE) AST-0950945 / National Science Foundation (NSF)
學術資源類型: 期刊文章
出版日期: 01/06/2026
出版資訊: The Astronomical journal, 卷.171(6), 頁.348
語言: 英語

The Backup Program of the Dark Energy Spectroscopic Instrument's Milky Way Survey

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