Overview of the DESI Milky Way Survey
We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory. Over the next 5 yr DESI MWS will observe approximately seven million stars at Galactic latitudes ∣ b ∣ > 20°, with...
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/acb3c0 |
| _version_ | 1797701987376037888 |
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| author | Andrew P. Cooper Sergey E. Koposov Carlos Allende Prieto Christopher J. Manser Namitha Kizhuprakkat Adam D. Myers Arjun Dey Boris T. Gänsicke Ting S. Li Constance Rockosi Monica Valluri Joan Najita Alis Deason Anand Raichoor M.-Y. Wang Y.-S. Ting Bokyoung Kim Andreia Carrillo Wenting Wang Leandro Beraldo e Silva Jiwon Jesse Han Jiani Ding Miguel Sánchez-Conde Jessica N. Aguilar Steven Ahlen Stephen Bailey Vasily Belokurov David Brooks Katia Cunha Kyle Dawson Axel de la Macorra Peter Doel Daniel J. Eisenstein Parker Fagrelius Kevin Fanning Andreu Font-Ribera Jaime E. Forero-Romero Enrique Gaztañaga Satya Gontcho A Gontcho Julien Guy Klaus Honscheid Robert Kehoe Theodore Kisner Anthony Kremin Martin Landriau Michael E. Levi Paul Martini Aaron M. Meisner Ramon Miquel John Moustakas Jundan J. D. Nie Nathalie Palanque-Delabrouille Will J. Percival Claire Poppett Francisco Prada Nabeel Rehemtulla Edward Schlafly David Schlegel Michael Schubnell Ray M. Sharples Gregory Tarlé Risa H. Wechsler David H. Weinberg Zhimin Zhou Hu Zou |
| author_facet | Andrew P. Cooper Sergey E. Koposov Carlos Allende Prieto Christopher J. Manser Namitha Kizhuprakkat Adam D. Myers Arjun Dey Boris T. Gänsicke Ting S. Li Constance Rockosi Monica Valluri Joan Najita Alis Deason Anand Raichoor M.-Y. Wang Y.-S. Ting Bokyoung Kim Andreia Carrillo Wenting Wang Leandro Beraldo e Silva Jiwon Jesse Han Jiani Ding Miguel Sánchez-Conde Jessica N. Aguilar Steven Ahlen Stephen Bailey Vasily Belokurov David Brooks Katia Cunha Kyle Dawson Axel de la Macorra Peter Doel Daniel J. Eisenstein Parker Fagrelius Kevin Fanning Andreu Font-Ribera Jaime E. Forero-Romero Enrique Gaztañaga Satya Gontcho A Gontcho Julien Guy Klaus Honscheid Robert Kehoe Theodore Kisner Anthony Kremin Martin Landriau Michael E. Levi Paul Martini Aaron M. Meisner Ramon Miquel John Moustakas Jundan J. D. Nie Nathalie Palanque-Delabrouille Will J. Percival Claire Poppett Francisco Prada Nabeel Rehemtulla Edward Schlafly David Schlegel Michael Schubnell Ray M. Sharples Gregory Tarlé Risa H. Wechsler David H. Weinberg Zhimin Zhou Hu Zou |
| author_sort | Andrew P. Cooper |
| collection | DOAJ |
| description | We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory. Over the next 5 yr DESI MWS will observe approximately seven million stars at Galactic latitudes ∣ b ∣ > 20°, with an inclusive target selection scheme focused on the thick disk and stellar halo. MWS will also include several high-completeness samples of rare stellar types, including white dwarfs, low-mass stars within 100 pc of the Sun, and horizontal branch stars. We summarize the potential of DESI to advance understanding of the Galactic structure and stellar evolution. We introduce the final definitions of the main MWS target classes and estimate the number of stars in each class that will be observed. We describe our pipelines for deriving radial velocities, atmospheric parameters, and chemical abundances. We use ≃500,000 spectra of unique stellar targets from the DESI Survey Validation program (SV) to demonstrate that our pipelines can measure radial velocities to ≃1 km s ^−1 and [Fe/H] accurate to ≃0.2 dex for typical stars in our main sample. We find the stellar parameter distributions from ≈100 deg ^2 of SV observations with ≳90% completeness on our main sample are in good agreement with expectations from mock catalogs and previous surveys. |
| first_indexed | 2024-03-12T04:44:39Z |
| format | Article |
| id | doaj.art-114f8abfb25849edb4e48c0473273b33 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T04:44:39Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-114f8abfb25849edb4e48c0473273b332023-09-03T09:29:33ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0194713710.3847/1538-4357/acb3c0Overview of the DESI Milky Way SurveyAndrew P. Cooper0https://orcid.org/0000-0001-8274-158XSergey E. Koposov1https://orcid.org/0000-0003-2644-135XCarlos Allende Prieto2https://orcid.org/0000-0002-0084-572XChristopher J. Manser3https://orcid.org/0000-0003-1543-5405Namitha Kizhuprakkat4Adam D. Myers5Arjun Dey6https://orcid.org/0000-0002-4928-4003Boris T. Gänsicke7https://orcid.org/0000-0002-2761-3005Ting S. Li8https://orcid.org/0000-0002-9110-6163Constance Rockosi9https://orcid.org/0000-0002-6667-7028Monica Valluri10https://orcid.org/0000-0002-6257-2341Joan Najita11https://orcid.org/0000-0002-5758-150XAlis Deason12https://orcid.org/0000-0001-6146-2645Anand Raichoor13https://orcid.org/0000-0001-5999-7923M.-Y. Wang14Y.-S. Ting15https://orcid.org/0000-0001-5082-9536Bokyoung Kim16https://orcid.org/0000-0002-8999-1108Andreia Carrillo17https://orcid.org/0000-0002-5786-0787Wenting Wang18Leandro Beraldo e Silva19https://orcid.org/0000-0002-0740-1507Jiwon Jesse Han20https://orcid.org/0000-0002-6800-5778Jiani Ding21https://orcid.org/0000-0003-4651-8510Miguel Sánchez-Conde22https://orcid.org/0000-0002-3849-9164Jessica N. Aguilar23https://orcid.org/0000-0003-0822-452XSteven Ahlen24https://orcid.org/0000-0001-6098-7247Stephen Bailey25https://orcid.org/0000-0003-4162-6619Vasily Belokurov26https://orcid.org/0000-0002-0038-9584David Brooks27https://orcid.org/0000-0002-8458-5047Katia Cunha28https://orcid.org/0000-0001-6476-0576Kyle Dawson29https://orcid.org/0000-0002-0553-3805Axel de la Macorra30Peter Doel31Daniel J. Eisenstein32https://orcid.org/0000-0002-2929-3121Parker Fagrelius33Kevin Fanning34Andreu Font-Ribera35https://orcid.org/0000-0002-3033-7312Jaime E. Forero-Romero36https://orcid.org/0000-0002-2890-3725Enrique Gaztañaga37https://orcid.org/0000-0001-9632-0815Satya Gontcho A Gontcho38https://orcid.org/0000-0003-3142-233XJulien Guy39https://orcid.org/0000-0001-9822-6793Klaus Honscheid40Robert Kehoe41https://orcid.org/0000-0002-7101-697XTheodore Kisner42https://orcid.org/0000-0003-3510-7134Anthony Kremin43https://orcid.org/0000-0001-6356-7424Martin Landriau44https://orcid.org/0000-0003-1838-8528Michael E. Levi45https://orcid.org/0000-0003-1887-1018Paul Martini46https://orcid.org/0000-0002-0194-4017Aaron M. Meisner47https://orcid.org/0000-0002-1125-7384Ramon Miquel48https://orcid.org/0000-0002-6610-4836John Moustakas49https://orcid.org/0000-0002-2733-4559Jundan J. D. Nie50https://orcid.org/0000-0001-6590-8122Nathalie Palanque-Delabrouille51https://orcid.org/0000-0003-3188-784XWill J. Percival52https://orcid.org/0000-0002-0644-5727Claire Poppett53Francisco Prada54https://orcid.org/0000-0001-7145-8674Nabeel Rehemtulla55https://orcid.org/0000-0002-5683-2389Edward Schlafly56https://orcid.org/0000-0002-3569-7421David Schlegel57https://orcid.org/0000-0002-5042-5088Michael Schubnell58Ray M. Sharples59https://orcid.org/0000-0003-3449-8583Gregory Tarlé60https://orcid.org/0000-0003-1704-0781Risa H. Wechsler61https://orcid.org/0000-0003-2229-011XDavid H. Weinberg62https://orcid.org/0000-0001-7775-7261Zhimin Zhou63https://orcid.org/0000-0002-4135-0977Hu Zou64https://orcid.org/0000-0002-6684-3997Institute of Astronomy and Department of Physics, National Tsing Hua University , 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, Taiwan ; apcooper@gapp.nthu.edu.tw; Center for Informatics and Computation in Astronomy , NTHU, 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, Taiwan; Physics Division, National Center for Theoretical Sciences , Taipei 10617, TaiwanInstitute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK; Institute of Astronomy, University of Cambridge , Madingley Rd., Cambridge CB3 0HA, UKInstituto de Astrofísica de Canarias , C/ Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain; Universidad de La Laguna , Dpto. Astrofísica, E-38206 La Laguna, Tenerife, SpainImperial College London , South Kensington Campus, London SW7 2AZ, UKInstitute of Astronomy and Department of Physics, National Tsing Hua University , 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, Taiwan ; apcooper@gapp.nthu.edu.tw; Center for Informatics and Computation in Astronomy , NTHU, 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, TaiwanDepartment of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USANSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USADepartment of Physics, University of Warwick , Gibbet Hill Rd., Coventry, CV4 7AL, UKDepartment of Astronomy & Astrophysics, University of Toronto , Toronto, ON M5S 3H4, CanadaDepartment of Astronomy and Astrophysics, University of California , Santa Cruz, 1156 High St., Santa Cruz, CA 95065, USA; University of California Observatories , 1156 High St., Santa Cruz, CA 95065, USADepartment of Astronomy, University of Michigan , Ann Arbor, MI 48109, USANSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USAInstitute=^texttx); for Computational Cosmology, Department of Physics, Durham University , South Rd., Durham DH1 3LE, UKLawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USAPittsburgh Supercomputing Center, Carnegie Mellon University , Pittsburgh, PA 15213, USAResearch School of Astronomy & Astrophysics, Australian National University , Cotter Rd., Weston, ACT 2611, Australia; School of Computing, Australian National University , Acton, ACT 2601, AustraliaInstitute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKInstitute=^texttx); for Computational Cosmology, Department of Physics, Durham University , South Rd., Durham DH1 3LE, UKDepartment of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of ChinaDepartment of Astronomy, University of Michigan , Ann Arbor, MI 48109, USACenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USADepartment of Astronomy and Astrophysics, University of California , Santa Cruz, 1156 High St., Santa Cruz, CA 95065, USA; University of California Observatories , 1156 High St., Santa Cruz, CA 95065, USAInstituto de Física Teórica (IFT) UAM/CSIC, Universidad Autónoma de Madrid , Cantoblanco, E-28049, Madrid, SpainLawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USAPhysics Dept., Boston University , 590 Commonwealth Ave., Boston, MA 02215, USALawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USAInstitute of Astronomy, University of Cambridge , Madingley Rd., Cambridge CB3 0HA, UK; Center for Computational Astrophysics, Flatiron Institute , 162 5th Ave., New York, NY 10010, USADepartment of Physics & Astronomy, University College London , Gower St., London, WC1E 6BT, UKSteward Observatory, University of Arizona , 933 N. Cherry Ave., Tucson, AZ 85721, USADepartment of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USAInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, MéxicoDepartment of Physics & Astronomy, University College London , Gower St., London, WC1E 6BT, UKCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USANSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USADepartment of Physics, The Ohio State University , 191 W. Woodruff Ave., Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 W. Woodruff Ave., Columbus, OH 43210, USAInstitut de Física d’Altes Energies (IFAE) , The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra, Barcelona, SpainDepartamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, ColombiaInstitut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona, Spain; Institute of Space Sciences , ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, E-08913 Bellaterra, Barcelona, SpainLawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA; Department of Physics and Astronomy, University of Rochester , 500 Joseph C. Wilson Blvd., Rochester, NY 14627, USALawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USADepartment of Physics, The Ohio State University , 191 W. Woodruff Ave., Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 W. Woodruff Ave., Columbus, OH 43210, USADepartment of Physics, Southern Methodist University , 3215 Daniel Ave., Dallas, TX 75275, USALawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USALawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USALawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USALawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USACenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 W. Woodruff Ave., Columbus, OH 43210, USA; Department of Astronomy, The Ohio State University , 4055 McPherson Laboratory, 140 W. 18th Ave., Columbus, OH 43210, USANSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USAInstitut de Física d’Altes Energies (IFAE) , The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra, Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats , Passeig de Lluís Companys, 23, E-08010 Barcelona, SpainDepartment of Physics and Astronomy, Siena College , 515 Loudon Rd., Loudonville, NY 12211, USANational Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of ChinaLawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA; IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, FranceWaterloo Centre for Astrophysics, University of Waterloo , 200 University Ave. W., Waterloo, ON N2L 3G1, Canada; Department of Physics and Astronomy, University of Waterloo , 200 University Ave. W., Waterloo, ON N2L 3G1, Canada; Perimeter Institute for Theoretical Physics , 31 Caroline St. N., Waterloo, ON N2L 2Y5, CanadaLawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA; Space Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720, USA; University of California , Berkeley, 110 Sproul Hall #5800 Berkeley, CA 94720, USAInstituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada, SpainDepartment of Astronomy, University of Michigan , Ann Arbor, MI 48109, USALawrence Livermore National Laboratory , P.O. Box 808 L-211, Livermore, CA 94551, USALawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USADepartment of Physics, University of Michigan , Ann Arbor, MI 48109, USAInstitute=^texttx); for Computational Cosmology, Department of Physics, Durham University , South Rd., Durham DH1 3LE, UK; Centre for Advanced Instrumentation, Department of Physics, Durham University , South Rd., Durham DH1 3LE, UKDepartment of Physics, University of Michigan , Ann Arbor, MI 48109, USAKavli Institute for Particle Astrophysics and Cosmology, Stanford University , Menlo Park, CA 94305, USA; Physics Department, Stanford University , Stanford, CA 93405, USA; SLAC National Accelerator Laboratory , Menlo Park, CA 94305, USACenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 W. Woodruff Ave., Columbus, OH 43210, USA; Department of Astronomy, The Ohio State University , 4055 McPherson Laboratory, 140 W. 18th Ave., Columbus, OH 43210, 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 ChinaWe describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory. Over the next 5 yr DESI MWS will observe approximately seven million stars at Galactic latitudes ∣ b ∣ > 20°, with an inclusive target selection scheme focused on the thick disk and stellar halo. MWS will also include several high-completeness samples of rare stellar types, including white dwarfs, low-mass stars within 100 pc of the Sun, and horizontal branch stars. We summarize the potential of DESI to advance understanding of the Galactic structure and stellar evolution. We introduce the final definitions of the main MWS target classes and estimate the number of stars in each class that will be observed. We describe our pipelines for deriving radial velocities, atmospheric parameters, and chemical abundances. We use ≃500,000 spectra of unique stellar targets from the DESI Survey Validation program (SV) to demonstrate that our pipelines can measure radial velocities to ≃1 km s ^−1 and [Fe/H] accurate to ≃0.2 dex for typical stars in our main sample. We find the stellar parameter distributions from ≈100 deg ^2 of SV observations with ≳90% completeness on our main sample are in good agreement with expectations from mock catalogs and previous surveys.https://doi.org/10.3847/1538-4357/acb3c0Milky Way stellar haloDwarf galaxiesMilky Way evolutionMilky Way GalaxyMilky Way dark matter haloMilky Way dynamics |
| spellingShingle | Andrew P. Cooper Sergey E. Koposov Carlos Allende Prieto Christopher J. Manser Namitha Kizhuprakkat Adam D. Myers Arjun Dey Boris T. Gänsicke Ting S. Li Constance Rockosi Monica Valluri Joan Najita Alis Deason Anand Raichoor M.-Y. Wang Y.-S. Ting Bokyoung Kim Andreia Carrillo Wenting Wang Leandro Beraldo e Silva Jiwon Jesse Han Jiani Ding Miguel Sánchez-Conde Jessica N. Aguilar Steven Ahlen Stephen Bailey Vasily Belokurov David Brooks Katia Cunha Kyle Dawson Axel de la Macorra Peter Doel Daniel J. Eisenstein Parker Fagrelius Kevin Fanning Andreu Font-Ribera Jaime E. Forero-Romero Enrique Gaztañaga Satya Gontcho A Gontcho Julien Guy Klaus Honscheid Robert Kehoe Theodore Kisner Anthony Kremin Martin Landriau Michael E. Levi Paul Martini Aaron M. Meisner Ramon Miquel John Moustakas Jundan J. D. Nie Nathalie Palanque-Delabrouille Will J. Percival Claire Poppett Francisco Prada Nabeel Rehemtulla Edward Schlafly David Schlegel Michael Schubnell Ray M. Sharples Gregory Tarlé Risa H. Wechsler David H. Weinberg Zhimin Zhou Hu Zou Overview of the DESI Milky Way Survey The Astrophysical Journal Milky Way stellar halo Dwarf galaxies Milky Way evolution Milky Way Galaxy Milky Way dark matter halo Milky Way dynamics |
| title | Overview of the DESI Milky Way Survey |
| title_full | Overview of the DESI Milky Way Survey |
| title_fullStr | Overview of the DESI Milky Way Survey |
| title_full_unstemmed | Overview of the DESI Milky Way Survey |
| title_short | Overview of the DESI Milky Way Survey |
| title_sort | overview of the desi milky way survey |
| topic | Milky Way stellar halo Dwarf galaxies Milky Way evolution Milky Way Galaxy Milky Way dark matter halo Milky Way dynamics |
| url | https://doi.org/10.3847/1538-4357/acb3c0 |
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