1. Overview of the DESI Milky Way Survey
- Author
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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, Cooper, AP [0000-0001-8274-158X], Koposov, SE [0000-0003-2644-135X], Allende Prieto, C [0000-0002-0084-572X], Manser, CJ [0000-0003-1543-5405], Dey, A [0000-0002-4928-4003], Gänsicke, BT [0000-0002-2761-3005], Li, TS [0000-0002-9110-6163], Rockosi, C [0000-0002-6667-7028], Valluri, M [0000-0002-6257-2341], Najita, J [0000-0002-5758-150X], Deason, A [0000-0001-6146-2645], Raichoor, A [0000-0001-5999-7923], Ting, YS [0000-0001-5082-9536], Kim, B [0000-0002-8999-1108], Carrillo, A [0000-0002-5786-0787], Beraldo e Silva, L [0000-0002-0740-1507], Han, JJ [0000-0002-6800-5778], Ding, J [0000-0003-4651-8510], Sánchez-Conde, M [0000-0002-3849-9164], Aguilar, JN [0000-0003-0822-452X], Ahlen, S [0000-0001-6098-7247], Bailey, S [0000-0003-4162-6619], Belokurov, V [0000-0002-0038-9584], Brooks, D [0000-0002-8458-5047], Cunha, K [0000-0001-6476-0576], Dawson, K [0000-0002-0553-3805], Eisenstein, DJ [0000-0002-2929-3121], Font-Ribera, A [0000-0002-3033-7312], Forero-Romero, JE [0000-0002-2890-3725], Gaztañaga, E [0000-0001-9632-0815], A Gontcho, SG [0000-0003-3142-233X], Guy, J [0000-0001-9822-6793], Kehoe, R [0000-0002-7101-697X], Kisner, T [0000-0003-3510-7134], Kremin, A [0000-0001-6356-7424], Landriau, M [0000-0003-1838-8528], Levi, ME [0000-0003-1887-1018], Martini, P [0000-0002-0194-4017], Meisner, AM [0000-0002-1125-7384], Miquel, R [0000-0002-6610-4836], Moustakas, J [0000-0002-2733-4559], Nie, JJD [0000-0001-6590-8122], Palanque-Delabrouille, N [0000-0003-3188-784X], Percival, WJ [0000-0002-0644-5727], Prada, F [0000-0001-7145-8674], Rehemtulla, N [0000-0002-5683-2389], Schlafly, E [0000-0002-3569-7421], Schlegel, D [0000-0002-5042-5088], Sharples, RM [0000-0003-3449-8583], Tarlé, G [0000-0003-1704-0781], Wechsler, RH [0000-0003-2229-011X], Weinberg, DH [0000-0001-7775-7261], Zhou, Z [0000-0002-4135-0977], Zou, H [0000-0002-6684-3997], Apollo - University of Cambridge Repository, HEP, INSPIRE, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and UAM. Departamento de Física Teórica
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Surveys (1671) ,Dwarf Galaxies (416) ,astro-ph.GA ,FOS: Physical sciences ,Milky Way Dark Matter Halo (1049) ,5109 Space Sciences ,Stellar Abundances (1577) ,Galaxy Formation (595) ,Milky Way Evolution (1052) ,Milky Way Galaxy (1054) ,Física ,Astronomy and Astrophysics ,Milky Way Stellar Halo (1060) ,Astrophysics - Astrophysics of Galaxies ,Space and Planetary Science ,5101 Astronomical Sciences ,Astrophysics of Galaxies (astro-ph.GA) ,Radial Velocity (1332) ,astro-ph.CO ,Milky Way Dynamics (1051) ,Spectroscopy (1558) ,Milky Way Galaxy Physics (1056) ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,[PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph] ,51 Physical Sciences ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, los autores pertenecientes a la UAM y el nombre del grupo de colaboración, si lo hubiere, 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 deg2 of SV observations with ≳90% completeness on our main sample are in good agreement with expectations from mock catalogs and previous surveys, This equipment was funded by MoE, NSTC, and National Tsing Hua University. C.A.P. acknowledges financial support from the Spanish Ministry of Science and Innovation (MICINN) projects AYA2017-86389-P and PID2020-117493GB-I00. C.J.M. acknowledges financial support from Imperial College London through an Imperial College Research Fellowship grant. M.V. and L.B.e.S. acknowledge support from NASA-ATP award 80NSSC20K0509. The work of A.D. and J.N. is supported by NOIRLab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. T.S.L. acknowledges financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) through grant RGPIN-2022-04794. B.T. G. was supported by grant ST/T000406/1 from the Science and Technology Facilities Council (STFC). This project has received funding from the European Research Council under the European Unionʼs Horizon 2020 research and innovation program (grant agreement No. 101020057). This research made use of computing time available on the high-performance computing system at the Instituto de Astrofisica de Canarias
- Published
- 2023
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