2011MNRAS.414.2690V

Query : 2011MNRAS.414.2690V

2011MNRAS.414.2690V - Mon. Not. R. Astron. Soc., 414, 2690-2695 (2011/July-1)

High-resolution near-infrared spectra of NGC 6624 and 6569.

VALENTI E., ORIGLIA L. and RICH R.M.

Abstract (from CDS):

We present the first abundance analysis based on high-resolution infrared (IR) echelle spectra of NGC 6569 and 6624, two moderately reddened globular clusters located in the outer bulge of the Galaxy.

We find [Fe/H]=-0.79 ±0.02 and -0.69±0.02 dex for NGC 6569 and 6624, respectively, and an average α-element enhancement of ≈+0.43±0.02 and +0.39 ± 0.02 dex, consistent with previous measurements on other metal-rich bulge clusters. We measure accurate radial velocities of <vr>=-47 ± 4 and +51±3 km/s and velocity dispersions of ≈8 and 6 km/s for NGC 6569 and 6624, respectively.

Finally, we find very low 12C/13C isotopic ratio ( ≤ 7 in NGC 6624 and ≈5 in NGC 6569), confirming the presence of extramixing mechanisms during the red giant branch evolution phase.

Data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The observatory was made possible for studies by the generous support of the W. M. Keck Foundation.


Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): techniques: spectroscopic - stars: abundances - stars: late-type - Galaxy: bulge - globular clusters: individual: NGC 6569 - globular clusters: individual: NGC 6624

Simbad objects: 27

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Number of rows : 27
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 6342 GlC 17 21 10.14 -19 35 14.7     10.01     ~ 310 0
3 GCl 66.1 GlC 17 30 38.90 -31 35 44.0           ~ 139 0
4 Liller 1 Cl* 17 33 24.50 -33 23 20.0           ~ 311 0
5 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
6 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
7 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
8 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
9 NAME UKS 1 GlC 17 54 27.20 -24 08 43.0           ~ 118 0
10 NAME Baade Window reg 18 03.5 -30 01           ~ 643 3
11 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 561 0
12 NGC 6539 GlC 18 04 49.74 -07 35 09.1           ~ 247 0
13 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
14 2MASS J18133817-3150029 * 18 13 38.172 -31 50 02.91           ~ 1 0
15 2MASS J18133817-3149355 * 18 13 38.1791347176 -31 49 35.410004652           ~ 2 0
16 2MASS J18133827-3149413 * 18 13 38.2806515904 -31 49 41.326293864           ~ 2 0
17 2MASS J18133865-3149392 * 18 13 38.6494667112 -31 49 39.305997624           ~ 2 0
18 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 276 0
19 2MASS J18133902-3149188 * 18 13 39.0210679008 -31 49 18.900091344           ~ 1 0
20 2MASS J18133939-3149209 LP? 18 13 39.3967097496 -31 49 21.008575812           ~ 2 0
21 2MASS J18234011-3021474 LP? 18 23 40.1190521160 -30 21 47.445514164           ~ 2 0
22 2MASS J18234014-3021535 LP? 18 23 40.1444277532 -30 21 53.638278603           ~ 2 0
23 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
24 2MASS J18234065-3021446 * 18 23 40.655 -30 21 44.67           ~ 1 0
25 2MASS J18234166-3021411 LP* 18 23 41.6667415632 -30 21 41.211673524           ~ 2 0
26 2MASS J18234214-3021263 LP? 18 23 42.1552927344 -30 21 26.319982824           ~ 3 0
27 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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