2014MNRAS.445.4241H

Query : 2014MNRAS.445.4241H

2014MNRAS.445.4241H - Mon. Not. R. Astron. Soc., 445, 4241-4246 (2014/December-3)

The Gaia-ESO Survey: the most metal-poor stars in the Galactic bulge.

HOWES L.M., ASPLUND M., CASEY A.R., KELLER S.C., YONG D., GILMORE G., LIND K., WORLEY C., BESSELL M.S., CASAGRANDE L., MARINO A.F., NATAF D.M., OWEN C.I., DA COSTA G.S., SCHMIDT B.P., TISSERAND P., RANDICH S., FELTZING S., VALLENARI A., ALLENDE PRIETO C., BENSBY T., FLACCOMIO E., KORN A.J., PANCINO E., RECIO-BLANCO A., SMILJANIC R., BERGEMANN M., COSTADO M.T., DAMIANI F., HEITER U., HILL V., HOURIHANE A., JOFRE P., LARDO C., DE LAVERNY P., MAGRINI L., MAIORCA E., MASSERON T., MORBIDELLI L., SACCO G.G., MINNITI D. and ZOCCALI M.

Abstract (from CDS):

We present the first results of the EMBLA survey (Extremely Metal-poor BuLge stars with AAOmega), aimed at finding metal-poor stars in the Milky Way bulge, where the oldest stars should now preferentially reside. EMBLA utilizes SkyMapper photometry to pre-select metal-poor candidates, which are subsequently confirmed using AAOmega spectroscopy. We describe the discovery and analysis of four bulge giants with -2.72 ≤ [Fe/H] ≤ -2.48, the lowest metallicity bulge stars studied with high-resolution spectroscopy to date. Using FLAMES/UVES spectra through the Gaia-ESO Survey we have derived abundances of twelve elements. Given the uncertainties, we find a chemical similarity between these bulge stars and halo stars of the same metallicity, although the abundance scatter may be larger, with some of the stars showing unusual [α/Fe] ratios.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): stars: abundances - stars: Population II - Galaxy: bulge - Galaxy: evolution

Simbad objects: 19

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Number of rows : 19
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 UCAC4 398-048552 Pe* 09 47 55.0389374352 -10 27 24.473998980   14.249 13.629 13.516   ~ 5 0
2 UCAC4 243-044523 Pe* 10 09 15.7757862504 -41 27 15.492522775   15.326 14.561 14.452   ~ 3 0
3 UCAC4 246-042607 Pe* 10 14 27.8630059445 -40 52 50.547109489   14.088 13.274 13.145   ~ 5 0
4 UCAC4 372-059586 Pe* 10 58 06.3739178303 -15 42 38.989737203   15.631 14.735 14.504   ~ 3 0
5 2MASS J11005336-1328082 Pe* 11 00 53.3593953273 -13 28 08.211035436           ~ 2 0
6 UCAC4 225-067876 Pe* 12 55 51.4609200822 -45 07 34.150768267   14.051 13.240 13.125   ~ 6 0
7 UCAC4 220-070995 Pe* 13 13 58.5052215844 -46 00 12.345262443   14.598 13.593 13.306   ~ 3 0
8 UCAC4 232-064708 Pe* 13 30 13.5983879928 -43 46 32.344311504   14.406 13.276 13.063   ~ 7 0
9 HD 122563 Pe* 14 02 31.8455084952 +09 41 09.944391876 7.47 7.10 6.19 5.37 4.79 G8:III:Fe-5 920 0
10 UCAC4 230-075933 Pe* 14 21 48.5959722974 -44 08 39.970223632   15.722 14.681 14.484   ~ 3 0
11 UCAC4 250-068799 Pe* 14 41 00.9152249902 -40 07 41.282574061   14.319 13.356 13.180   ~ 3 0
12 HD 140283 Pe* 15 43 03.0971190219 -10 56 00.595693188 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 985 0
13 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
14 UCAC4 243-149952 Pe* 17 55 10.4918588664 -41 28 12.107329932       16.07   ~ 3 0
15 UCAC4 242-142964 Pe* 17 56 52.4151356448 -41 36 12.650193072       15.96   ~ 3 0
16 UCAC4 280-186369 Pe* 18 21 53.8145872320 -34 10 18.520415004       12.93   ~ 4 0
17 UCAC4 315-209301 Pe* 18 36 17.3397997440 -27 00 05.323623372       14.11   ~ 4 0
18 NAME Local Group GrG ~ ~           ~ 9325 0
19 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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