2004A&A...423..507Z


Query : 2004A&A...423..507Z

2004A&A...423..507Z - Astronomy and Astrophysics, volume 423, 507-516 (2004/8-4)

The metal content of the bulge globular cluster NGC 6528.

ZOCCALI M., BARBUY B., HILL V., ORTOLANI S., RENZINI A., BICA E., MOMANY Y., PASQUINI L., MINNITI D. and RICH R.M.

Abstract (from CDS):

High resolution spectra of five stars in the bulge globular cluster NGC 6528 were obtained at the 8m VLT UT2-Kueyen telescope with the UVES spectrograph. Out of the five stars, two of them showed evidence of binarity. The target stars belong to the horizontal and red giant branch stages, at 4000<Teff<4800K. Multiband V, I, J, H, Ks photometry was used to derive initial effective temperatures and gravities. The main purpose of this study is the determination of metallicity and elemental ratios for this template bulge cluster, as a basis for the fundamental calibration of metal-rich populations. The present analysis provides a metallicity [Fe/H]=-0.1±0.2 and the α-elements O, Mg and Si, show [α/Fe]≃+0.1, whereas Ca and Ti are around the solar value or below, resulting in an overall metallicity Z≃Z.

Abstract Copyright:

Journal keyword(s): Galaxy: bulge - globular clusters: individual: NGC 6528 - stars: abundances - stars: atmospheres

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1361 0
2 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 780 0
3 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1906 0
4 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2130 0
5 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 350 0
6 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 579 0
7 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 502 0
8 2MASS J18044775-3003469 RG* 18 04 47.7709635240 -30 03 46.977830676     16.42     ~ 11 0
9 2MASS J18044953-3003044 RG* 18 04 49.536 -30 03 04.48           ~ 2 0
10 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 504 0
11 Cl* NGC 6528 VY I-18 * 18 04 49.7 -30 03 02           ~ 2 0
12 2MASS J18045029-3003099 RG* 18 04 50.294 -30 03 09.95     16.89     ~ 3 0
13 Cl* NGC 6528 VY I-36 RG* 18 04 50.92 -30 03 48.0     16.41     ~ 4 0
14 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 361 0
15 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 477 0

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2023.01.31-09:07:20

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