2009AJ....137.4753J

Query : 2009AJ....137.4753J

2009AJ....137.4753J - Astron. J., 137, 4753-4765 (2009/June-0)

Abundances of red giants in old open clusters. IV. NGC 1817, NGC 1883, NGC 2141, and NGC 2158.

JACOBSON H.R., FRIEL E.D. and PILACHOWSKI C.A.

Abstract (from CDS):

We present an analysis of high-dispersion echelle spectra of seven giant stars in the ∼1-2 Gyr old open clusters NGC 1817, NGC 1883, NGC 2141, and NGC 2158. Abundances were determined relative to the bright, mildly metal-poor disk giant Arcturus. NGC 1817, NGC 1883, NGC 2141, and NGC 2158 are found to have a mean [Fe/H] = -0.07±0.04, -0.01±0.01, +0.00±0.16, and -0.03 ±0.14 (s.d.), respectively. All four clusters show modest (∼0.1 dex) enhancements of Na and Si, and scaled solar abundances of Al and Mg, while [O/Fe] ∼ -0.15 dex. [Ca/Fe] and [Ti/Fe] values are slightly subsolar in all four clusters, but this may be due to a systematic effect. Given that all four of these clusters are located at Rgc> 10 kpc in the disk, and barring any systematic effects, our results imply that any abrupt transition in abundance in the Galactic disk occurs beyond Rgc∼ 13 kpc.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: abundances - open clusters and associations: individual (NGC 1817, NGC 1883, NGC 2141, NGC 2158) - stars: abundances

VizieR on-line data: <Available at CDS (J/AJ/137/4753): table2.dat table3.dat>

Simbad objects: 29

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Number of rows : 29
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 1193 OpC 03 05 56.4 +44 22 58     12.6     ~ 97 0
3 * ome01 Tau PM* 04 09 09.9660201816 +19 36 33.181657128   6.581 5.504     K2III 130 0
4 * gam Tau ** 04 19 47.6039239005 +15 37 39.511385129 5.46 4.64 3.65 4.83   G9.5IIIabCN0.5 569 0
5 * d Per bC* 04 21 33.1662438000 +46 29 55.964841936 4.31 4.757 4.812     B4IV 200 1
6 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
7 NGC 1817 79 HB* 05 12 10.6739122296 +16 38 31.112306268   13.54 12.443     ~ 33 0
8 2MASS J05122465+1635488 AB? 05 12 24.6514051896 +16 35 48.865173360   13.12 12.057     ~ 36 0
9 NGC 1817 OpC 05 12 33.9 +16 41 34           ~ 210 0
10 Cl Berkeley 17 OpC 05 20 30.5 +30 34 20           ~ 192 0
11 2MASS J05255167+4629353 * 05 25 51.6727541184 +46 29 35.319509412   15.03 13.25 12.6   ~ 11 0
12 2MASS J05255362+4626203 * 05 25 53.6220464915 +46 26 20.287044501   14.91 13.30 12.8   ~ 12 0
13 GSC 03358-01294 * 05 25 53.8486717368 +46 27 38.807604000   15.11 13.48 13.10   ~ 3 0
14 NGC 1883 OpC 05 25 53.9 +46 29 14     12.0     ~ 52 0
15 NGC 2141 4009 RG* 06 02 50.7852271656 +10 30 28.104400296     13.27     ~ 24 0
16 NGC 2141 OpC 06 02 56.5 +10 26 57           ~ 159 0
17 NGC 2158 4230 RG* 06 07 14.0761740939 +24 06 54.701954722   14.887 13.138 12.70   ~ 29 0
18 NGC 2158 OpC 06 07 26.7 +24 05 53           ~ 317 0
19 Cl Berkeley 31 OpC 06 57 37.5 +08 17 18           ~ 142 0
20 Cl Berkeley 32 OpC 06 58 06.7 +06 25 53           ~ 164 0
21 NGC 2420 OpC 07 38 24.6 +21 34 26   9.0 8.3     ~ 523 0
22 Cl Berkeley 39 OpC 07 46 48.1 -04 39 59           ~ 209 1
23 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
24 Cl Collinder 261 OpC 12 38 04.7 -68 22 40     10.7     ~ 216 0
25 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
26 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
27 NGC 7142 OpC 21 45 10.2 +65 47 05   10.36 9.3     ~ 157 0
28 * 35 Peg PM* 22 27 51.5231162634 +04 41 44.404460456 6.74 5.86 4.80 4.02 3.46 K1-III-IV 276 0
29 HD 223094 * 23 46 25.5113636112 +28 42 13.012018200   8.60 6.97     K5III 37 0

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