The Astrophysical Journal (Jan 2023)
Overview of the DESI Milky Way Survey
- 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
Affiliations
- Andrew P. Cooper
- ORCiD
- Institute of Astronomy and Department of Physics, National Tsing Hua University , 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, Taiwan ; [email protected]; 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, Taiwan
- Sergey E. Koposov
- ORCiD
- Institute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK; Institute of Astronomy, University of Cambridge , Madingley Rd., Cambridge CB3 0HA, UK
- Carlos Allende Prieto
- ORCiD
- Instituto 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, Spain
- Christopher J. Manser
- ORCiD
- Imperial College London , South Kensington Campus, London SW7 2AZ, UK
- Namitha Kizhuprakkat
- Institute of Astronomy and Department of Physics, National Tsing Hua University , 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, Taiwan ; [email protected]; Center for Informatics and Computation in Astronomy , NTHU, 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, Taiwan
- Adam D. Myers
- Department of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USA
- Arjun Dey
- ORCiD
- NSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USA
- Boris T. Gänsicke
- ORCiD
- Department of Physics, University of Warwick , Gibbet Hill Rd., Coventry, CV4 7AL, UK
- Ting S. Li
- ORCiD
- Department of Astronomy & Astrophysics, University of Toronto , Toronto, ON M5S 3H4, Canada
- Constance Rockosi
- ORCiD
- Department 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, USA
- Monica Valluri
- ORCiD
- Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA
- Joan Najita
- ORCiD
- NSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USA
- Alis Deason
- ORCiD
- Institute=^texttx); for Computational Cosmology, Department of Physics, Durham University , South Rd., Durham DH1 3LE, UK
- Anand Raichoor
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- M.-Y. Wang
- Pittsburgh Supercomputing Center, Carnegie Mellon University , Pittsburgh, PA 15213, USA
- Y.-S. Ting
- ORCiD
- Research School of Astronomy & Astrophysics, Australian National University , Cotter Rd., Weston, ACT 2611, Australia; School of Computing, Australian National University , Acton, ACT 2601, Australia
- Bokyoung Kim
- ORCiD
- Institute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
- Andreia Carrillo
- ORCiD
- Institute=^texttx); for Computational Cosmology, Department of Physics, Durham University , South Rd., Durham DH1 3LE, UK
- Wenting Wang
- Department of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of China
- Leandro Beraldo e Silva
- ORCiD
- Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA
- Jiwon Jesse Han
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USA
- Jiani Ding
- ORCiD
- Department 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, USA
- Miguel Sánchez-Conde
- ORCiD
- Instituto de Física Teórica (IFT) UAM/CSIC, Universidad Autónoma de Madrid , Cantoblanco, E-28049, Madrid, Spain
- Jessica N. Aguilar
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- Steven Ahlen
- ORCiD
- Physics Dept., Boston University , 590 Commonwealth Ave., Boston, MA 02215, USA
- Stephen Bailey
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- Vasily Belokurov
- ORCiD
- Institute of Astronomy, University of Cambridge , Madingley Rd., Cambridge CB3 0HA, UK; Center for Computational Astrophysics, Flatiron Institute , 162 5th Ave., New York, NY 10010, USA
- David Brooks
- ORCiD
- Department of Physics & Astronomy, University College London , Gower St., London, WC1E 6BT, UK
- Katia Cunha
- ORCiD
- Steward Observatory, University of Arizona , 933 N. Cherry Ave., Tucson, AZ 85721, USA
- Kyle Dawson
- ORCiD
- Department of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USA
- Axel de la Macorra
- Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, México
- Peter Doel
- Department of Physics & Astronomy, University College London , Gower St., London, WC1E 6BT, UK
- Daniel J. Eisenstein
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USA
- Parker Fagrelius
- NSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USA
- Kevin Fanning
- Department 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, USA
- Andreu Font-Ribera
- ORCiD
- Institut de Física d’Altes Energies (IFAE) , The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra, Barcelona, Spain
- Jaime E. Forero-Romero
- ORCiD
- Departamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, Colombia
- Enrique Gaztañaga
- ORCiD
- Institut 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, Spain
- Satya Gontcho A Gontcho
- ORCiD
- Lawrence 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, USA
- Julien Guy
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- Klaus Honscheid
- Department 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, USA
- Robert Kehoe
- ORCiD
- Department of Physics, Southern Methodist University , 3215 Daniel Ave., Dallas, TX 75275, USA
- Theodore Kisner
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- Anthony Kremin
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- Martin Landriau
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- Michael E. Levi
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- Paul Martini
- ORCiD
- Center 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, USA
- Aaron M. Meisner
- ORCiD
- NSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USA
- Ramon Miquel
- ORCiD
- Institut 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, Spain
- John Moustakas
- ORCiD
- Department of Physics and Astronomy, Siena College , 515 Loudon Rd., Loudonville, NY 12211, USA
- Jundan J. D. Nie
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of China
- Nathalie Palanque-Delabrouille
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA; IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, France
- Will J. Percival
- ORCiD
- Waterloo 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, Canada
- Claire Poppett
- Lawrence 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, USA
- Francisco Prada
- ORCiD
- Instituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada, Spain
- Nabeel Rehemtulla
- ORCiD
- Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA
- Edward Schlafly
- ORCiD
- Lawrence Livermore National Laboratory , P.O. Box 808 L-211, Livermore, CA 94551, USA
- David Schlegel
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Rd., Berkeley, CA 94720, USA
- Michael Schubnell
- Department of Physics, University of Michigan , Ann Arbor, MI 48109, USA
- Ray M. Sharples
- ORCiD
- Institute=^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, UK
- Gregory Tarlé
- ORCiD
- Department of Physics, University of Michigan , Ann Arbor, MI 48109, USA
- Risa H. Wechsler
- ORCiD
- Kavli 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, USA
- David H. Weinberg
- ORCiD
- Center 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, USA
- Zhimin Zhou
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of China
- Hu Zou
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of China
- DOI
- https://doi.org/10.3847/1538-4357/acb3c0
- Journal volume & issue
-
Vol. 947,
no. 1
p. 37
Abstract
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.
Keywords
- Milky Way stellar halo
- Dwarf galaxies
- Milky Way evolution
- Milky Way Galaxy
- Milky Way dark matter halo
- Milky Way dynamics
