2006A&A...449..349B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST09:39:47

2006A&A...449..349B - Astronomy and Astrophysics, volume 449, 349-358 (2006/4-1)

VLT-UVES analysis of two giants in the bulge metal-poor globular cluster HP-1. Analysis of two giants in HP-1.

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

Abstract (from CDS):

Metal-poor globular clusters in the bulge are important tracers of early chemical evolution. HP-1 is among the six metal-poor clusters within 5° of the Galactic center, and could be the one closest to the center The main purpose of this study is the determination of metallicity and elemental ratios. High resolution spectra of two giants of the bulge globular cluster HP-1 were obtained at the 8m VLT UT2-Kueyen telescope with the UVES spectrograph. This is the second metal-poor globular cluster in the bulge for which a detailed abundance analysis is presented. Multiband V,I,J,H,Ks photometry was used to derive effective temperatures. The present analysis provides a metallicity [Fe/H]=-1.00±0.2. The α-elements oxygen and silicon show [α/Fe]≃+0.3, whereas magnesium, calcium and titanium show solar ratios. A proper motion analysis indicates that the two stars are cluster members. The metallicity is unexpected for a blue Horizontal Branch (BHB) cluster. HP-1 is the first known cluster with such a high metallicity combined with a BHB and a steep Red Giant Branch (RGB). Together with NGC 6388 and NGC 6441 of [Fe/H]~-0.6 it would be third with such characteristics, but it differs from them, since these two other clusters have also a populous Red HB, and a normal slope of the RGB for their metallicity, which is not the case of HP-1.

Abstract Copyright:

Journal keyword(s): Galaxy: bulge - Galaxy: globular clusters: individual: HP-1 - stars: abundances - stars: Hertzsprung-Russell (HR) and C-M diagrams

Nomenclature: Table 2: Cl* Haute-Provence 1 BZO N (Nos 2, 3).

Simbad objects: 19

goto Full paper

goto View the reference in ADS

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 - 2020
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3547 0
2 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2131 0
3 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1771 0
4 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1676 0
5 M 107 GlC 16 32 31.86 -13 03 13.6   9.96 8.85     ~ 702 0
6 GCl 66.1 GlC 17 30 38.90 -31 35 44.0           ~ 97 0
7 ESO 455-11 GlC 17 31 05.20 -29 58 54.0           ~ 131 0
8 Cl* Haute-Provence 1 BZO 2 * 17 31 05.85 -29 58 35.5     16.982     ~ 4 0
9 Cl* Haute-Provence 1 BZO 3 * 17 31 05.87 -29 59 18.1     17.003     ~ 4 0
10 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 805 1
11 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11533 0
12 NGC 6441 GlC 17 50 13.06 -37 03 05.2   9.26 8.00     ~ 768 0
13 NAME UKS 1 GlC 17 54 27.20 -24 08 43.0           ~ 66 0
14 GCl 80.1 GlC 18 01 38.80 -26 50 23.0           ~ 86 0
15 ESO 521-16 GlC 18 02 57.40 -26 04 00.0           ~ 73 0
16 NGC 6522 GlC 18 03 34.08 -30 02 02.3   10.68 9.48     ~ 455 1
17 NGC 6540 GlC 18 06 08.60 -27 45 55.0           ~ 90 0
18 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1806 0
19 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 1024 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2006A&A...449..349B and select 'bookmark this link' or equivalent in the popup menu


2020.07.05-09:39:47

© Université de Strasbourg/CNRS

    • Contact