2010A&A...518A..15C


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.24CET22:50:32

2010A&A...518A..15C - Astronomy and Astrophysics, volume 518, A15-15 (2010/7-2)

Near-infrared properties of metal-poor globular clusters in the Galactic Bulge direction.

CHUN S.-H., KIM J.-W., SHIN I.-G., CHUNG C., LIM D.-W., PARK J.-H., KIM H.-I., HAN W. and SOHN Y.-J.

Abstract (from CDS):

J, H, and K' images obtained from the near-infrared imager CFHTIR on the Canada-France-Hawaii Telescope are used to derive the morphological parameters of the red giant branch (RGB) in the near-infrared color-magnitude diagrams for 12 metal-poor globular clusters in the Galactic bulge direction. Using the compiled data set of the RGB parameters for the observed 12 clusters, in addition to the previously studied 5 clusters, we discuss the properties of the RGB morphology for the clusters and compare them with the calibration relations for the metal-rich bulge clusters and the metal-poor halo clusters. The photometric RGB shape indices, such as colors at fixed magnitudes of MK=MH=(-5.5, -5, -4, and -3), magnitudes at fixed colors of (J-K)o=(J-H)o=0.7, and the RGB slope, were measured from the fiducial normal points defined in the near-infrared color-magnitude diagrams for each cluster. The magnitudes of RGB bump and tip were also estimated from the differential and cumulative luminosity functions of the selected RGB stars. The derived RGB parameters were used to examine the overall behaviors of the RGB morphology as a function of cluster metallicity. The correlations between the near-infrared photometric RGB shape indices and the cluster metallicity for the program clusters compare favorably with the previous observational calibration relations for metal-rich clusters in the Galactic bulge and the metal-poor halo clusters. The observed near-infrared magnitudes of the RGB bump and tip for the investigated clusters also accord with the previous calibration relations for the Galactic bulge clusters.

Abstract Copyright:

Journal keyword(s): Galaxy: structure - globular clusters: general - stars: evolution - infrared: stars - techniques: photometric

Simbad objects: 20

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Number of rows : 20

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2034 0
2 NGC 6235 GlC 16 53 25.36 -22 10 38.8   11.99 7.20     ~ 164 0
3 M 62 GlC 17 01 12.60 -30 06 44.5   8.55 7.39     ~ 528 0
4 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 318 1
5 NGC 6287 GlC 17 05 09.4907827015 -22 42 28.100632364   11.49 10.30     ~ 201 0
6 NGC 6293 GlC 17 10 10.42 -26 34 54.2   9.96 9.02     ~ 248 0
7 NGC 6325 GlC 17 17 59.27 -23 45 57.7   11.49       ~ 148 0
8 M 9 GlC 17 19 11.78 -18 30 58.5   9.36 8.42     ~ 284 0
9 NGC 6355 GlC 17 23 58.65 -26 21 12.3   12.46 11.05     ~ 130 0
10 GCl 66.1 GlC 17 30 38.90 -31 35 44.0           ~ 99 0
11 NGC 6401 GlC 17 38 36.93 -23 54 31.5   11.31 10.71     ~ 137 0
12 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11991 0
13 NGC 6541 GlC 18 08 02.36 -43 42 53.6   8.06 7.32     ~ 332 1
14 NGC 6558 GlC 18 10 18.38 -31 45 48.6   12.39 11.29     ~ 187 0
15 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 679 0
16 NGC 6642 GlC 18 31 54.23 -23 28 34.1   11.30 10.24     ~ 167 0
17 M 70 GlC 18 43 12.76 -32 17 31.6   9.76 9.06     ~ 340 0
18 NGC 6717 GlC 18 55 06.04 -22 42 05.3   11.29 10.35     ~ 202 0
19 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 440 0
20 NAME Galactic Bulge reg ~ ~           ~ 3531 0

    Equat.    Gal    SGal    Ecl

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2021.02.24-22:50:32

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