2006AJ....131.1565K

Query : 2006AJ....131.1565K

2006AJ....131.1565K - Astron. J., 131, 1565-1573 (2006/March-0)

UBVI CCD photometry of the old open cluster Berkeley 17.

KRUSBERG Z.A.C. and CHABOYER B.

Abstract (from CDS):

Photometric UBVI CCD photometry is presented for NGC 188 and Berkeley 17. Color-magnitude diagrams (CMDs) are constructed and reach well past the main-sequence turnoff for both clusters. Cluster ages are determined by means of isochrone fitting to the cluster CMDs. These fits are constrained to agree with spectroscopic metallicity and reddening estimates. Cluster ages are determined to be 7.0±0.5 Gyr for NGC 188 and 10.0±1.0 Gyr for Berkeley 17, where the errors refer to uncertainties in the relative age determinations. These ages are compared to the ages of relatively metal-rich inner halo/thick-disk globular clusters and other old open clusters. Berkeley 17 and NGC 6791 are the oldest open clusters, with ages of 10 Gyr. They are 2 Gyr younger than the thick-disk globular clusters. These results confirm the status of Berkeley 17 as one of the oldest known open clusters in the Milky Way, and its age provides a lower limit to the age of the Galactic disk.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Disk - Galaxy: Formation - Galaxy: Open Clusters and Associations: General - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 188 - Galaxy: Open Clusters and Associations: Individual: Name: Berkeley 17

VizieR on-line data: <Available at CDS (J/AJ/131/1565): table2.dat table3.dat>

Nomenclature: Table 2: CL* NGC 188 KC NNN (Nos 1-536). Table 3: CL* Berkeley 17 KC NNNN (Nos 1-1239).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 33

Full paper

View the references in ADS

Number of rows : 33

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 104	GlC	00 24 05.359	-72 04 53.20			4.09			~	4158	0
2	NGC 188	OpC	00 47 14.8	+85 14 42						~	990	0
3	NGC 1193	OpC	03 05 56.4	+44 22 58			12.6			~	97	0
4	Cl Berkeley 17	OpC	05 20 30.5	+30 34 20						~	192	0
5	Cl Berkeley 20	OpC	05 32 36.8	+00 11 06						~	129	0
6	Cl Berkeley 21	OpC	05 51 44.7	+21 48 36		12.26	11.1			~	130	0
7	NGC 2141	OpC	06 02 56.5	+10 26 57						~	159	0
8	NGC 2204	OpC	06 15 31.5	-18 40 28		9.35	8.6			~	172	0
9	NGC 2243	OpC	06 29 34.3	-31 16 58		10.12	9.4			~	298	0
10	Cl Berkeley 31	OpC	06 57 37.5	+08 17 18						~	142	0
11	Cl Berkeley 32	OpC	06 58 06.7	+06 25 53						~	164	0
12	NGC 2420	OpC	07 38 24.6	+21 34 26		9.0	8.3			~	523	0
13	Cl Berkeley 39	OpC	07 46 48.1	-04 39 59						~	209	1
14	NGC 2506	OpC	08 00 02.3	-10 46 22		8.28	7.6			~	313	0
15	NGC 2682	OpC	08 51 23.5	+11 48 54						~	2528	0
16	Cl Collinder 261	OpC	12 38 04.7	-68 22 40			10.7			~	216	0
17	M 5	GlC	15 18 33.22	+02 04 51.7			5.95			~	2095	0
18	NGC 5927	GlC	15 28 00.69	-50 40 22.9						~	499	0
19	M 107	GlC	16 32 31.86	-13 03 13.6						~	835	0
20	PG 1633+099	HS*	16 35 24.0241690848	+09 47 49.891209036	13.215	14.205	14.396	14.481	14.609	sdB	113	0
21	NGC 6304	GlC	17 14 32.25	-29 27 43.3						~	394	0
22	NGC 6362	GlC	17 31 54.99	-67 02 54.0						~	637	0
23	NGC 6624	GlC	18 23 40.51	-30 21 39.7						~	939	1
24	M 69	GlC	18 31 23.10	-32 20 53.1						~	492	0
25	NGC 6652	GlC	18 35 45.63	-32 59 26.6						~	474	0
26	NGC 6712	GlC	18 53 04.32	-08 42 21.5						~	550	0
27	NGC 6723	GlC	18 59 33.15	-36 37 56.1						~	543	0
28	NGC 6791	OpC	19 20 52.8	+37 46 40		10.52	9.5			~	1120	0
29	NGC 6819	OpC	19 41 18.3	+40 11 19		8.21	7.3			~	719	0
30	GCl 114	GlC	19 45 14.40	-08 00 26.0			7.54			~	165	0
31	M 71	GlC	19 53 46.49	+18 46 45.1						~	1190	0
32	NGC 6939	OpC	20 31 40.6	+60 38 54						~	171	0
33	PG 2213-006	HS*	22 16 28.3762385784	-00 21 13.503339864	12.747	13.93	14.14	14.54	14.348	sdOB	79	0

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