1998A&A...329..937C

Query : 1998A&A...329..937C

1998A&A...329..937C - Astronomy and Astrophysics, volume 329, 937-942 (1998/1-3)

On the calibration of Red Giant Branch metallicity indicators in globular clusters: new relations based on an improved abundance scale.

CARRETTA E. and BRAGAGLIA A.

Abstract (from CDS):

We present an improved calibration of photometric metallicity indicators, derived from the new metallicity scale for Globular Clusters presented by Carretta & Gratton (1997A&AS..121...95C) and based on direct high resolution spectroscopy of 160 stars in 24 globular clusters. We have carefully recalibrated the traditional abundance indices based upon the red giant branch (RGB) morphology, both in the V,B-V and V,V-I planes, namely the dereddened colour at the luminosity level of the horizontal branch (HB), and the magnitude difference between the HB and the RBG at a given dereddened colour. Finally, we give new accurate relations to employ in the Simultaneous Metallicity Reddening method by Sarajedini (1994AJ....107..618S), also tied to the Carretta & Gratton (1997A&AS..121...95C) abundance scale.

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - globular clusters: general

CDS comments: Table 1 : ESO 121 = ESO 121-3

Simbad objects: 19

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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 - 2024 		#notes
1 Cl Lindsay 1 Cl* 00 03 53.50 -73 28 15.0   11.7       ~ 119 0
2 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3912 0
3 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1041 0
4 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1083 0
5 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 520 0
6 NAME Eridanus Star Cluster GlC 04 24 44.5 -21 11 13           ~ 177 1
7 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1428 0
8 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 816 0
9 ESO 121-3 Cl* 06 02 03.32 -60 31 25.6   14.91 14.04     ~ 114 0
10 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 997 0
11 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 620 0
12 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2477 0
13 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 367 0
14 NGC 6352 GlC 17 25 29.11 -48 25 19.8           ~ 396 0
15 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1974 0
16 NGC 6535 GlC 18 03 50.51 -00 17 51.5     9.85     ~ 294 0
17 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2000 0
18 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3138 0
19 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1030 1

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