Overview of the DESI Milky Way Survey
Andrew P. CooperCenter for Informatics and Computation in Astronomy, NTHU, 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, TaiwanS. E. KoposovInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKCarlos Allende PrietoInstituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, Tenerife, SpainChristopher J. ManserImperial College London, South Kensington Campus, London SW7 2AZ, UKNamitha KizhuprakkatCenter for Informatics and Computation in Astronomy, NTHU, 101 Kuang-Fu Rd. Sec. 2, Hsinchu 30013, TaiwanAdam D. MyersDepartment of Physics & Astronomy, University of Wyoming, 1000 E. University, Dept. 3905, Laramie, WY 82071, USAArjun DeyNSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USAB. T. GänsickeDepartment of Physics, University of Warwick, Gibbet Hill Rd., Coventry, CV4 7AL, UKTing S. LiDepartment of Astronomy & Astrophysics, University of Toronto, Toronto, ON M5S 3H4, CanadaConstance M. RockosiDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, 1156 High St., Santa Cruz, CA 95065, USAMonica ValluriDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAJoan NajitaNSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USAAlis J. DeasonInstitute=^texttx); for Computational Cosmology, Department of Physics, Durham University, South Rd., Durham DH1 3LE, UKAnand RaichoorLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAM. S. WangPittsburgh Supercomputing Center, Carnegie Mellon University, Pittsburgh, PA 15213, USAYuan-Sen TingResearch School of Astronomy & Astrophysics, Australian National University, Cotter Rd., Weston, ACT 2611, AustraliaBokyoung KimInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKAndreia CarrilloInstitute=^texttx); for Computational Cosmology, Department of Physics, Durham University, South Rd., Durham DH1 3LE, UKWenting WangDepartment of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of ChinaLeandro Beraldo e SilvaDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAJ. HanCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USAJiani DingDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, 1156 High St., Santa Cruz, CA 95065, USAM. Sánchez‐CondeInstituto de Física Teórica (IFT) UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, E-28049, Madrid, SpainJ. AguilarLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAS. AhlenPhysics Dept., Boston University, 590 Commonwealth Ave., Boston, MA 02215, USAS. BaileyLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAVasily BelokurovCenter for Computational Astrophysics, Flatiron Institute, 162 5th Ave., New York, NY 10010, USADavid BrooksDepartment of Physics & Astronomy, University College London, Gower St., London, WC1E 6BT, UKKátia CunhaSteward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USAKyle DawsonDepartment of Physics and Astronomy, The University of Utah, 115 South 1400 East, Salt Lake City, UT 84112, USAAxel de la MacorraInstituto de Física, Universidad Nacional Autónoma de México, Cd. de México C.P. 04510, MéxicoP. DoelDepartment of Physics & Astronomy, University College London, Gower St., London, WC1E 6BT, UKDaniel J. EisensteinCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USAParker FagreliusNSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USAKevin FanningCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 W. Woodruff Ave., Columbus, OH 43210, USAAndreu Font-RiberaInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra, Barcelona, SpainJ. E. Forero-RomeroDepartamento de Física, Universidad de los Andes, Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, ColombiaE. GaztañagaInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainSatya Gontcho A GontchoDepartment of Physics and Astronomy, University of Rochester, 500 Joseph C. Wilson Blvd., Rochester, NY 14627, USAJ. GuyLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAK. HonscheidCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 W. Woodruff Ave., Columbus, OH 43210, USAR. KehoeDepartment of Physics, Southern Methodist University, 3215 Daniel Ave., Dallas, TX 75275, USATheodore KisnerLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAAnthony KreminLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAMartin LandriauLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAM. E. LeviLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAJ. ErezaCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 W. Woodruff Ave., Columbus, OH 43210, USAAaron MeisnerNSF's NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USAR. MiquelInstitució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys, 23, E-08010 Barcelona, SpainJohn MoustakasDepartment of Physics and Astronomy, Siena College, 515 Loudon Rd., Loudonville, NY 12211, USAJundan NieNational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of ChinaN. Palanque‐DelabrouilleIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceWill J. PercivalDepartment of Physics and Astronomy, University of Waterloo, 200 University Ave. W., Waterloo, ON N2L 3G1, CanadaClaire PoppettLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAFrancisco PradaInstituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía, s/n, E-18008 Granada, SpainNabeel RehemtullaDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAEdward F. SchlaflyLawrence Livermore National Laboratory, P.O. Box 808 L-211, Livermore, CA 94551, USADavid J. SchlegelLawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USAM. SchubnellDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAR. M. SharplesCentre for Advanced Instrumentation, Department of Physics, Durham University, South Rd., Durham DH1 3LE, UKG. TarléDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAR.H. WechslerKavli Institute for Particle Astrophysics and Cosmology, Stanford University, Menlo Park, CA 94305, USADavid H. WeinbergCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 W. Woodruff Ave., Columbus, OH 43210, USAZhimin ZhouNational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of ChinaH. ZouNational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Rd., Chaoyang District, Beijing, 100101, People’s Republic of China
2023en
ABI
Abstract
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.
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Citations and references
Cited by 30 references