2006ApJ...642..462G

Query : 2006ApJ...642..462G

2006ApJ...642..462G - Astrophys. J., 642, 462-469 (2006/May-1)

The metallicity of the old open cluster NGC 6791.

GRATTON R., BRAGAGLIA A., CARRETTA E. and TOSI M.

Abstract (from CDS):

We have observed four red clump stars in the very old, metal-rich open cluster NGC 6791 to derive its metallicity using the high-resolution spectrograph SARG mounted on the Galileo National Telescope (TNG). Using a spectrum synthesis technique, we obtain an average value of [Fe/H]=+0.47 (±0.04, rms=0.08) dex. Our method was tested on µ Leo, a well-studied, metal-rich field giant. We also derive average oxygen and carbon abundances for NGC 6791 from synthesis of [O I] at 6300 Å and C2at 5086 Å, finding [O/Fe]≃-0.3 and [C/Fe]≃-0.2.

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Journal keyword(s): Galaxy: Disk - Galaxy: Open Clusters and Associations: General - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 6791 - Stars: Abundances

Simbad objects: 9

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Number of rows : 9
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 NGC 188 OpC 00 47 14.8 +85 14 42           ~ 990 0
2 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
3 * ksi Cnc SB* 09 09 21.5411482824 +22 02 43.578120660   6.123 5.149     G8.5IIIFe-0.5CH-1 97 0
4 * mu. Leo PM* 09 52 45.8170136628 +26 00 25.024269924 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 479 0
5 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
6 NGC 6791 1349 RG* 19 20 52.8818474088 +37 45 33.157234044   15.874 14.55   13.24 K2/K3III 65 0
7 NGC 6791 3009 RG* 19 20 56.2990343832 +37 44 33.478562148   16.12 14.2408     ~ 60 0
8 NGC 6791 3019 * 19 20 57.91 +37 43 18.4   16.03 14.69     K4III 22 0
9 NGC 6791 2014 RG* 19 21 00.8624204232 +37 46 39.656777664   16.091 14.636 14.192 13.23 ~ 48 0

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