2009BaltA..18..225K

Query : 2009BaltA..18..225K

2009BaltA..18..225K - Baltic Astronomy, 18, 225-232 (2009/December-0)

Properties of red giant branches of star clusters in the magellanic clouds and their relation with cluster metallicity. II. Mean photometric colors of cluster RGBs.

KUCINSKAS A., DOBROVOLSKAS V., LAZAUSKAITE R. and TANABE T.

Abstract (from CDS):

We derive new calibrations that relate the mean J-Ks photometric colors of red giant branch (RGB) stars at MKs=-5.5 and -5.0 with cluster metallicity. The new calibrations are derived using a sample of intermediate age (1-8 Gyr) clusters in the Large and Small Magellanic Clouds, with the JHKs photometry taken from the SIRIUS photometric survey of the Magellanic Clouds. Cluster metallicities are literature data, obtained either from the high resolution or infrared calcium triplet spectroscopy of individual RGB stars. We find systematic differences between the RGB color vs. metallicity relations derived in this work and those determined by Valenti et al. (2004), the latter ones obtained for a sample of old Galactic globular clusters. In terms of age, this discrepancy corresponds to ∼5 Gyr and therefore can be attributed to the age difference between the two cluster samples used in the derivation of the corresponding RGB color vs. metallicity relations.

Abstract Copyright: ∼

Journal keyword(s): galaxies: Magellanic Clouds - galaxies: star clusters - star clusters: abundances - infrared: stars - techniques: photometric

Simbad objects: 17

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Number of rows : 17
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 Cl Lindsay 7 Cl* 00 24 43.16 -73 45 11.7   13.2       ~ 39 0
2 NGC 152 OpC 00 32 56.76 -73 06 56.4 13.37 13.05 12.26   11.13 ~ 96 0
3 Cl Lindsay 17 OpC 00 35 41.70 -73 35 51.4 14.27 14.13 13.35   12.45 ~ 28 0
4 Cl Lindsay 19 Cl* 00 37 41.78 -73 54 19.7 13.70 14.78 13.18   12.17 ~ 36 0
5 Cl Lindsay 27 Cl* 00 41 23.83 -72 53 32.0 13.37 13.28 12.44   11.49 ~ 46 0
6 Cl Kron 28 OpC 00 51 39.55 -71 59 56.6 10.98 10.56 10.42   10.04 ~ 34 0
7 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
8 Cl Kron 44 OpC 01 02 06.34 -73 55 22.7 14.05 13.73 12.95   11.82 ~ 45 0
9 NGC 361 OpC 01 02 11.11 -71 36 25.3 12.86 12.43 11.77   10.70 ~ 105 0
10 NGC 416 Cl* 01 07 59.03 -72 21 20.5 12.73 12.55 11.76   10.71 ~ 156 1
11 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 287 0
12 Cl Lindsay 113 Cl* 01 49 30.0 -73 43 40   11.9       ~ 97 0
13 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
14 NGC 1846 Cl* 05 07 34.900 -67 27 32.45   12.08 11.31     ~ 231 0
15 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
16 NAME Hodge 3 GlC 05 33 19.700 -68 09 07.23   14.36 13.42     ~ 23 0
17 NGC 2121 Cl* 05 48 13.190 -71 28 52.00   13.21 12.37     ~ 134 0

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