The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation
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 < 0.6, the DESI Bright Galaxy Survey (BGS) will produce the mo...
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
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| Series: | The Astronomical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-3881/accff8 |
| _version_ | 1797696980333363200 |
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| author | ChangHoon Hahn Michael J. Wilson Omar Ruiz-Macias Shaun Cole David H. Weinberg John Moustakas Anthony Kremin Jeremy L. Tinker Alex Smith Risa H. Wechsler Steven Ahlen Shadab Alam Stephen Bailey David Brooks Andrew P. Cooper Tamara M. Davis Kyle Dawson Arjun Dey Biprateep Dey Sarah Eftekharzadeh Daniel J. Eisenstein Kevin Fanning Jaime E. Forero-Romero Carlos S. Frenk Enrique Gaztañaga Satya Gontcho A Gontcho Julien Guy Klaus Honscheid Mustapha Ishak Stéphanie Juneau Robert Kehoe Theodore Kisner Ting-Wen Lan Martin Landriau Laurent Le Guillou Michael E. Levi Christophe Magneville Paul Martini Aaron Meisner Adam D. Myers Jundan Nie Peder Norberg Nathalie Palanque-Delabrouille Will J. Percival Claire Poppett Francisco Prada Anand Raichoor Ashley J. Ross Sasha Safonova Christoph Saulder Eddie Schlafly David Schlegel David Sierra-Porta Gregory Tarle Benjamin A. Weaver Christophe Yèche Pauline Zarrouk Rongpu Zhou Zhimin Zhou Hu Zou |
| author_facet | ChangHoon Hahn Michael J. Wilson Omar Ruiz-Macias Shaun Cole David H. Weinberg John Moustakas Anthony Kremin Jeremy L. Tinker Alex Smith Risa H. Wechsler Steven Ahlen Shadab Alam Stephen Bailey David Brooks Andrew P. Cooper Tamara M. Davis Kyle Dawson Arjun Dey Biprateep Dey Sarah Eftekharzadeh Daniel J. Eisenstein Kevin Fanning Jaime E. Forero-Romero Carlos S. Frenk Enrique Gaztañaga Satya Gontcho A Gontcho Julien Guy Klaus Honscheid Mustapha Ishak Stéphanie Juneau Robert Kehoe Theodore Kisner Ting-Wen Lan Martin Landriau Laurent Le Guillou Michael E. Levi Christophe Magneville Paul Martini Aaron Meisner Adam D. Myers Jundan Nie Peder Norberg Nathalie Palanque-Delabrouille Will J. Percival Claire Poppett Francisco Prada Anand Raichoor Ashley J. Ross Sasha Safonova Christoph Saulder Eddie Schlafly David Schlegel David Sierra-Porta Gregory Tarle Benjamin A. Weaver Christophe Yèche Pauline Zarrouk Rongpu Zhou Zhimin Zhou Hu Zou |
| author_sort | ChangHoon Hahn |
| collection | DOAJ |
| description | 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 < 0.6, the DESI Bright Galaxy Survey (BGS) will produce the most detailed map of the universe during the dark-energy-dominated epoch with redshifts of >10 million galaxies spanning 14,000 deg ^2 . In this work, we present and validate the final BGS target selection and survey design. From the Legacy Surveys, BGS will target an r < 19.5 mag limited sample (BGS Bright), a fainter 19.5 < r < 20.175 color-selected sample (BGS Faint), and a smaller low- z quasar sample. BGS will observe these targets using exposure times scaled to achieve homogeneous completeness and cover the footprint three times. We use observations from the Survey Validation programs conducted prior to the main survey along with simulations to show that BGS can complete its strategy and make optimal use of “bright” time. BGS targets have stellar contamination <1%, and their densities do not depend strongly on imaging properties. BGS Bright will achieve >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. |
| first_indexed | 2024-03-12T03:33:48Z |
| format | Article |
| id | doaj.art-72f497f0d74c4723b6c59ce03a1a8b96 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T03:33:48Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-72f497f0d74c4723b6c59ce03a1a8b962023-09-03T13:22:25ZengIOP PublishingThe Astronomical Journal1538-38812023-01-01165625310.3847/1538-3881/accff8The DESI Bright Galaxy Survey: Final Target Selection, Design, and ValidationChangHoon Hahn0https://orcid.org/0000-0003-1197-0902Michael J. Wilson1Omar Ruiz-Macias2https://orcid.org/0000-0001-8848-9768Shaun Cole3https://orcid.org/0000-0002-5954-7903David H. Weinberg4https://orcid.org/0000-0001-7775-7261John Moustakas5https://orcid.org/0000-0002-2733-4559Anthony Kremin6https://orcid.org/0000-0001-6356-7424Jeremy L. Tinker7https://orcid.org/0000-0003-3578-6149Alex Smith8Risa H. Wechsler9https://orcid.org/0000-0003-2229-011XSteven Ahlen10https://orcid.org/0000-0001-6098-7247Shadab Alam11https://orcid.org/0000-0002-3757-6359Stephen Bailey12https://orcid.org/0000-0003-4162-6619David Brooks13https://orcid.org/0000-0002-8458-5047Andrew P. Cooper14https://orcid.org/0000-0001-8274-158XTamara M. Davis15https://orcid.org/0000-0002-4213-8783Kyle Dawson16https://orcid.org/0000-0002-0553-3805Arjun Dey17https://orcid.org/0000-0002-4928-4003Biprateep Dey18https://orcid.org/0000-0002-5665-7912Sarah Eftekharzadeh19Daniel J. Eisenstein20https://orcid.org/0000-0002-2929-3121Kevin Fanning21Jaime E. Forero-Romero22https://orcid.org/0000-0002-2890-3725Carlos S. Frenk23https://orcid.org/0000-0002-2338-716XEnrique Gaztañaga24https://orcid.org/0000-0001-9632-0815Satya Gontcho A Gontcho25Julien Guy26https://orcid.org/0000-0001-9822-6793Klaus Honscheid27Mustapha Ishak28https://orcid.org/0000-0002-6024-466XStéphanie Juneau29https://orcid.org/0000-0002-0000-2394Robert Kehoe30https://orcid.org/0000-0002-7101-697XTheodore Kisner31Ting-Wen Lan32https://orcid.org/0000-0001-8857-7020Martin Landriau33https://orcid.org/0000-0003-1838-8528Laurent Le Guillou34https://orcid.org/0000-0001-7178-8868Michael E. Levi35https://orcid.org/0000-0003-1887-1018Christophe Magneville36Paul Martini37https://orcid.org/0000-0002-0194-4017Aaron Meisner38https://orcid.org/0000-0002-1125-7384Adam D. Myers39Jundan Nie40https://orcid.org/0000-0001-6590-8122Peder Norberg41https://orcid.org/0000-0002-5875-0440Nathalie Palanque-Delabrouille42https://orcid.org/0000-0003-3188-784XWill J. Percival43https://orcid.org/0000-0002-0644-5727Claire Poppett44Francisco Prada45Anand Raichoor46https://orcid.org/0000-0001-5999-7923Ashley J. Ross47Sasha Safonova48Christoph Saulder49https://orcid.org/0000-0002-0408-5633Eddie Schlafly50https://orcid.org/0000-0002-3569-7421David Schlegel51https://orcid.org/0000-0002-5042-5088David Sierra-Porta52https://orcid.org/0000-0003-3461-1347Gregory Tarle53https://orcid.org/0000-0003-1704-0781Benjamin A. Weaver54Christophe Yèche55https://orcid.org/0000-0001-5146-8533Pauline Zarrouk56Rongpu Zhou57https://orcid.org/0000-0001-5381-4372Zhimin Zhou58Hu Zou59https://orcid.org/0000-0002-6684-3997Department of Astrophysical Sciences, Princeton University , Peyton Hall, Princeton, NJ 08544, USA ; changhoon.hahn@princeton.edu; Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USALawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA; Institute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UKInstitute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UKInstitute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UKDepartment of Astronomy and the Center for Cosmology and Astroparticle Physics, The Ohio State University , 140 West 18th Avenue, Columbus, OH 43210, USADepartment of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211, USALawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USACenter for Cosmology and Particle Physics, Department of Physics, New York University , New York, NY 10003, USAInstitute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UK; IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, France; Institute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKDepartment of Physics, Stanford University , 382 Via Pueblo Mall, Stanford, CA 94305, USA; Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USA; SLAC National Accelerator Laboratory , Menlo Park, CA 94025, USAPhysics Dept., Boston University , 590 Commonwealth Avenue, Boston, MA 02215, USAInstitute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USADepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKInstitute of Astronomy and Department of Physics, National Tsing Hua University , 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, TaiwanSchool of Mathematics and Physics, University of Queensland , 4101, AustraliaDepartment of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USANSF’s NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USADepartment of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh , 3941 O’Hara Street, Pittsburgh, PA 15260, USAUniversities Space Research Association , NASA Ames Research Centre, USACenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USADepartment of Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USADepartamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Bogotá, ColombiaInstitute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UKInstitut de Cìencies de l’Espai , IEEC-CSIC, Campus UAB, Carrer de Can Magrans s/n, E-08913 Bellaterra, Barcelona, SpainLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA; Department of Physics and Astronomy, University of Rochester , 500 Joseph C. Wilson Boulevard, Rochester, NY 14627, USALawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USADepartment of Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USADepartment of Physics, The University of Texas at Dallas , Richardson, TX 75080, USANSF’s National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USADepartment of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275, USALawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USADepartment of Physics, National Taiwan University , Taipei 10617, Taiwan; Graduate Institute of Astrophysics, National Taiwan University , Taipei 10617, TaiwanLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USASorbonne Université, Université Paris Diderot , CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies, LPNHE, 4 place Jussieu, F-75252 Paris, FranceLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USACEA Saclay , IRFU F-91191 Gif-sur-Yvette, FranceCenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; Department of Astronomy, The Ohio State University , 4055 McPherson Laboratory, 140 W. 18th Avenue, Columbus, OH 43210, USANSF’s National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USADepartment of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USANational Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of ChinaInstitute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UK; Center for Extragalactic Astronomy, Department of Physics, Durham University , South Road, Durham DH1 3LE, UKLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA; CEA Saclay , IRFU F-91191 Gif-sur-Yvette, FranceWaterloo Centre for Astrophysics, University of Waterloo , 200 University Avenue W, Waterloo, ON N2L 3G1, Canada; Department of Physics and Astronomy, University of Waterloo , 200 University Avenue W, Waterloo, ON N2L 3G1, Canada; Perimeter Institute for Theoretical Physics, 31 Caroline Street N, Waterloo, ON N2L 2Y5, CanadaLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USAInstituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada, SpainLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USACenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USAPhysics Department, Yale University , P.O. Box 208120, New Haven, CT 06511, USAKorea Astronomy and Space Science Institute , 776, Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of KoreaLawrence Livermore National Laboratory , P.O. Box 808 L-211, Livermore, CA 94551, USALawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USADepartamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Bogotá, Colombia; Facultad de Ciencias Básicas. Universidad Tecnológica de Bolivar . Cartagena 130010, ColombiaDepartment of Physics, University of Michigan , Ann Arbor, MI 48109, USANSF’s National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USACEA Saclay , IRFU F-91191 Gif-sur-Yvette, FranceSorbonne Université, Université Paris Diderot , CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies, LPNHE, 4 place Jussieu, F-75252 Paris, FranceLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USANational Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of ChinaNational Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of ChinaOver 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 < 0.6, the DESI Bright Galaxy Survey (BGS) will produce the most detailed map of the universe during the dark-energy-dominated epoch with redshifts of >10 million galaxies spanning 14,000 deg ^2 . In this work, we present and validate the final BGS target selection and survey design. From the Legacy Surveys, BGS will target an r < 19.5 mag limited sample (BGS Bright), a fainter 19.5 < r < 20.175 color-selected sample (BGS Faint), and a smaller low- z quasar sample. BGS will observe these targets using exposure times scaled to achieve homogeneous completeness and cover the footprint three times. We use observations from the Survey Validation programs conducted prior to the main survey along with simulations to show that BGS can complete its strategy and make optimal use of “bright” time. BGS targets have stellar contamination <1%, and their densities do not depend strongly on imaging properties. BGS Bright will achieve >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.https://doi.org/10.3847/1538-3881/accff8Observational cosmologyCosmologyRedshift surveysGalaxiesGalactic and extragalactic astronomyGalaxy spectroscopy |
| spellingShingle | ChangHoon Hahn Michael J. Wilson Omar Ruiz-Macias Shaun Cole David H. Weinberg John Moustakas Anthony Kremin Jeremy L. Tinker Alex Smith Risa H. Wechsler Steven Ahlen Shadab Alam Stephen Bailey David Brooks Andrew P. Cooper Tamara M. Davis Kyle Dawson Arjun Dey Biprateep Dey Sarah Eftekharzadeh Daniel J. Eisenstein Kevin Fanning Jaime E. Forero-Romero Carlos S. Frenk Enrique Gaztañaga Satya Gontcho A Gontcho Julien Guy Klaus Honscheid Mustapha Ishak Stéphanie Juneau Robert Kehoe Theodore Kisner Ting-Wen Lan Martin Landriau Laurent Le Guillou Michael E. Levi Christophe Magneville Paul Martini Aaron Meisner Adam D. Myers Jundan Nie Peder Norberg Nathalie Palanque-Delabrouille Will J. Percival Claire Poppett Francisco Prada Anand Raichoor Ashley J. Ross Sasha Safonova Christoph Saulder Eddie Schlafly David Schlegel David Sierra-Porta Gregory Tarle Benjamin A. Weaver Christophe Yèche Pauline Zarrouk Rongpu Zhou Zhimin Zhou Hu Zou The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation The Astronomical Journal Observational cosmology Cosmology Redshift surveys Galaxies Galactic and extragalactic astronomy Galaxy spectroscopy |
| title | The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation |
| title_full | The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation |
| title_fullStr | The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation |
| title_full_unstemmed | The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation |
| title_short | The DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation |
| title_sort | desi bright galaxy survey final target selection design and validation |
| topic | Observational cosmology Cosmology Redshift surveys Galaxies Galactic and extragalactic astronomy Galaxy spectroscopy |
| url | https://doi.org/10.3847/1538-3881/accff8 |
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