Query : 2005A&A...442..195I

2005A&A...442..195I - Astronomy and Astrophysics, volume 442, 195-200 (2005/10-4)

Red giant branch stars as probes of stellar populations. II. Properties of the newly discovered globular cluster GLIMPSE-C01.


Abstract (from CDS):

Deep near infrared photometry of the newly discovered Galactic globular Cluster GLIMPSE-C01 is reported. We derived for the first time the metal abundance of this object from the slope of the RGB: [Fe/H]=-1.61±0.14 in the scale of Zinn (as implemented in Harris, 1996AJ....112.1487H), [Fe/H]=-1.44±0.12 in the scale of Caretta & Gratton (1997A&AS..121...95C), and [Fe/H]=-1.12±0.12 in the scale of Ferraro et al. (1999AJ....118.1738F). The tip and the clump of the red giant branch were used to confirm the estimates of Kobulnicky et al. (2005AJ....129..239K), placing the cluster at D∼3.7±0.8kpc, behind AV∼15mag of visual extinction. The best fit to the radial surface brightness profile with a single-mass King's model yielded a core radius rc=0.78arcmin, tidal radius rt=27arcmin and central concentration c=1.54. Finally, we estimate the number of the ``missing'' globulars in the central region of the Milky Way. Based on the spatial distribution of the known clusters, and assuming radial symmetry around the Galactic center, we conclude that the Milky Way contains at least 10±3 undiscovered objects. The distribution of known clusters in the bulge seem to resemble the orientation of the Milky Way bar.

Abstract Copyright:

Journal keyword(s): Galaxy: globular clusters: general - Galaxy: abundances - stars: distances - Galaxy: bulge - Galaxy: fundamental parameters

Simbad objects: 2

goto Full paper

goto View the references in ADS

Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13564 0
2 GLIMPSE C01 GlC 18 48 49.7 -01 29 50           ~ 49 0

To bookmark this query, right click on this link: simbad:objects in 2005A&A...442..195I and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact