2023ApJ...947...37C

Query : 2023ApJ...947...37C

2023ApJ...947...37C - Astrophys. J., 947, 37 (2023/April-2)

Overview of the DESI Milky Way Survey.

COOPER A.P., KOPOSOV S.E., ALLENDE PRIETO C., MANSER C.J., KIZHUPRAKKAT N., MYERS A.D., DEY A., GANSICKE B.T., LI T.S., ROCKOSI C., VALLURI M., NAJITA J., DEASON A., RAICHOOR A., WANG M.-Y., TING Y.-S., KIM B., CARRILLO A., WANG W., BERALDO E SILVA L., HAN J.J., DING J., SANCHEZ-CONDE M., AGUILAR J.N., AHLEN S., BAILEY S., BELOKUROV V., BROOKS D., CUNHA K., DAWSON K., DE LA MACORRA A., DOEL P., EISENSTEIN D.J., FAGRELIUS P., FANNING K., FONT-RIBERA A., FORERO-ROMERO J.E., GAZTANAGA E., GONTCHO A GONTCHO S., GUY J., HONSCHEID K., KEHOE R., KISNER T., KREMIN A., LANDRIAU M., LEVI M.E., MARTINI P., MEISNER A.M., MIQUEL R., MOUSTAKAS J., NIE J.J.D., PALANQUE-DELABROUILLE N., PERCIVAL W.J., POPPETT C., PRADA F., REHEMTULLA N., SCHLAFLY E., SCHLEGEL D., SCHUBNELL M., SHARPLES R.M., TARLE G., WECHSLER R.H., WEINBERG D.H., ZHOU Z. and ZOU H.

Abstract (from CDS):

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.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Milky Way stellar halo - Dwarf galaxies - Milky Way evolution - Milky Way Galaxy - Milky Way dark matter halo - Milky Way dynamics - Surveys - Milky Way Galaxy physics - Spectroscopy - Radial velocity - Stellar abundances - Galaxy formation

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
3 NAME Aliqa Uma Stream St* 02 07 -31.5           ~ 33 0
4 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
6 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
7 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
8 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
9 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
10 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
11 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
12 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
13 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 907 0
14 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 675 0
15 Cl Pal 5 GlC 15 16 05.30 -00 06 41.0   15.1       ~ 797 1
16 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
17 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
18 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
19 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
20 GD 362 WD* 17 31 34.3168718112 +37 05 20.711767812   16.3   16.4   DAZB 200 0
21 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
22 NAME Hercules Aquila Cloud reg 19 04 +06.3           ~ 138 0
23 NAME Orphan Stream St* 19 09 -23.           ~ 281 0
24 NAME Chenab Stream St* 21 17 -59.9           ~ 45 0
25 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
26 NAME GD-1 Stream St* 22 40 +31.           ~ 319 0
27 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
28 NAME Local Group GrG ~ ~           ~ 9325 0
29 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 860 0
30 NAME Virgo Overdensity reg ~ ~           ~ 53 0
31 NAME Galactic Bulge reg ~ ~           ~ 4794 0
32 NAME ATLAS Stream St* ~ ~           ~ 44 0

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