2003ApJ...586..195H

Query : 2003ApJ...586..195H

2003ApJ...586..195H - Astrophys. J., 586, 195-200 (2003/March-3)

Selection of metal-poor giant stars using the Sloan Digital Sky Survey photometric system.

HELMI A., IVEZIC Z., PRADA F., PENTERICCI L., ROCKOSI C.M., SCHNEIDER D.P., GREBEL E.K., HARBECK D., LUPTON R.H., GUNN J.E., KNAPP G.R., STRAUSS M.A. and BRINKMANN J.

Abstract (from CDS):

We present a method for the photometric selection of metal-poor halo giants from the imaging data of the Sloan Digital Sky Survey(9) (SDSS). These stars are offset from the stellar locus in the g-r versus u-g color-color diagram. Based on a sample of 29 candidates for which spectra were taken, we derive a selection efficiency of the order of 50% for stars brighter than r∼17mag. The candidates selected in 400 deg2 of sky from the SDSS Early Data Release trace the known halo structures (tidal streams from the Sagittarius dwarf galaxy and the Draco dwarf spheroidal galaxy), indicating that such a color-selected sample can be used to study the halo structure even without spectroscopic information. This method, and supplemental techniques for selecting halo stars, such as RR Lyrae stars and other blue horizontal-branch stars, can produce an unprecedented three-dimensional map of the Galactic halo based on the SDSS imaging survey.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: General - Galaxy: Halo - Galaxy: Structure - Stars: Population II - Surveys - Techniques: Photometric

Nomenclature: Table 1: [HIP2003] JHHMMSS.s+DDMMSS.s N=29.

Simbad objects: 31

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Number of rows : 31
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 2MASS J00045670-0018371 * 00 04 56.7162261192 -00 18 37.058166612           ~ 1 0
2 ATO J001.2805+00.0446 EB* 00 05 07.3423015296 +00 02 41.025578172           ~ 4 0
3 2MASS J00101695+0052255 Pe* 00 10 16.9498923024 +00 52 25.378567212           ~ 4 0
4 2MASS J00152412-0021269 PM* 00 15 24.1146946920 -00 21 26.873864820           ~ 1 0
5 2MASS J00215749-0017382 * 00 21 57.4888783584 -00 17 38.431582368           ~ 1 0
6 2MASS J00290079+0005297 * 00 29 00.7971304440 +00 05 29.518039212           ~ 2 0
7 2MASS J00300581-0024070 * 00 30 05.8251906504 -00 24 07.168391172           ~ 1 0
8 2MASS J00322004+0051414 * 00 32 20.0540861664 +00 51 41.363229060           ~ 1 0
9 2MASS J00323151-0022271 * 00 32 31.5152947752 -00 22 27.103225872           ~ 1 0
10 2MASS J00333634-0049087 * 00 33 36.3532884984 -00 49 08.736596760           ~ 1 0
11 2MASS J00334052-0017174 PM* 00 33 40.5232982760 -00 17 17.631765420           ~ 1 0
12 2MASS J00342837+0032044 * 00 34 28.3692133992 +00 32 04.291640772           ~ 1 0
13 2MASS J00354446+0004122 * 00 35 44.4677764752 +00 04 12.413767476           ~ 1 0
14 2MASS J00382179-0017483 * 00 38 21.8040266664 -00 17 48.401059200           ~ 1 0
15 2MASS J00383917+0007128 * 00 38 39.1778477232 +00 07 12.882685692           ~ 1 0
16 2MASS J00384239+0035551 * 00 38 42.3910731816 +00 35 55.132506348           F9 2 0
17 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
18 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
19 2MASS J23224983+0000454 Pe* 23 22 49.8512322336 +00 00 45.591647904           ~ 2 0
20 2MASS J23233049+0058178 * 23 23 30.4926681840 +00 58 17.810277492           ~ 1 0
21 2MASS J23234400+0030167 * 23 23 44.0067238248 +00 30 16.914863484           ~ 1 0
22 2MASS J23255114+0100229 PM* 23 25 51.1524989688 +01 00 22.962070584           ~ 1 0
23 2MASS J23285698+0055497 * 23 28 56.9924703600 +00 55 49.721041236           F2 2 0
24 2MASS J23291665+0055515 * 23 29 16.6616675184 +00 55 51.361754556           ~ 2 0
25 2MASS J23310584+0002218 * 23 31 05.8538847192 +00 02 21.721408368           ~ 1 0
26 SDSS J233122.30-001732.4 * 23 31 22.3143987528 -00 17 32.404150860           F2 3 0
27 2MASS J23345955-0016050 RG* 23 34 59.5632931968 -00 16 05.075699520           KIII 4 0
28 2MASS J23373514-0105024 * 23 37 35.1332358312 -01 05 02.565205800           ~ 1 0
29 2MASS J23435643+0010522 * 23 43 56.4205448928 +00 10 52.264106004           ~ 1 0
30 CRTS J234939.6-004257 EB* 23 49 39.6604660080 -00 42 56.899131012     16.41     ~ 4 0
31 2MASS J23515391+0002378 PM* 23 51 53.9090144040 +00 02 37.865616108           ~ 2 0

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