Preliminary Target Selection for the DESI Milky Way Survey (MWS)
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Preliminary Target Selection for the DESI Milky Way Survey (MWS)

  • Author(s): Prieto, Carlos Allende;
  • Cooper, Andrew P;
  • Dey, Arjun;
  • Gänsicke, Boris T;
  • Koposov, Sergey E;
  • Li, Ting;
  • Manser, Christopher;
  • Nidever, David L;
  • Rockosi, Constance;
  • Wang, Mei-Yu;
  • Aguado, David S;
  • Blum, Robert;
  • Brooks, David;
  • Eisenstein, Daniel J;
  • Duan, Yutong;
  • Eftekharzadeh, Sarah;
  • Gaztañaga, Enrique;
  • Kehoe, Robert;
  • Landriau, Martin;
  • Lee, Chien-Hsiu;
  • Levi, Michael E;
  • Meisner, Aaron M;
  • Myers, Adam D;
  • Najita, Joan;
  • Olsen, Knut;
  • Palanque-Delabrouille, Nathalie;
  • Poppett, Claire;
  • Prada, Francisco;
  • Schlegel, David J;
  • Schubnell, Michael;
  • Tarlé, Gregory;
  • Valluri, Monica;
  • Wechsler, Risa H;
  • Yèche, Christophe
  • et al.
Abstract

The DESI Milky Way Survey (MWS) will observe $\ge$8 million stars between $16 < r < 19$ mag, supplemented by observations of brighter targets under poor observing conditions. The survey will permit an accurate determination of stellar kinematics and population gradients; characterize diffuse substructure in the thick disk and stellar halo; enable the discovery of extremely metal-poor stars and other rare stellar types; and improve constraints on the Galaxy's 3D dark matter distribution from halo star kinematics. MWS will also enable a detailed characterization of the stellar populations within 100 pc of the Sun, including a complete census of white dwarfs. The target catalog from the preliminary selection described here is public.

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