2003A&A...397..831S

Query : 2003A&A...397..831S

2003A&A...397..831S - Astronomy and Astrophysics, volume 397, 831-838 (2003/1-3)

Age and metallicity of a globular cluster in the dwarf spheroidal galaxy DDO 78.

SHARINA M.E., SIL'CHENKO O.K. and BURENKOV A.N.

Abstract (from CDS):

We present the results of moderate resolution spectroscopy for a globular cluster in the M81 group dwarf spheroidal galaxy DDO 78. The DDO 78 globular cluster, 4 Milky Way globular clusters, spectroscopic and radial velocity standards were observed with the Long-slit spectrograph of the 6-m telescope (SAO RAS, Russia). Lick spectrophotometric indices were determined in the bandpasses adopted by Burstein et al. (1984ApJ...287..586B). We have derived the mean metallicity of the globular cluster in DDO78 to be [Fe/H]=-1.6±0.1dex by taking the weighted mean of metallicities obtained from the strength of several absorption features. We have estimated an age for the globular cluster of 9-12Gyr similar to that found for the Galactic globular cluster NGC 362, which resembles the DDO 78 cluster in its chemical abundance and integrated spectrophotometric properties.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: star clusters - galaxies: individual: DDO 78

Nomenclature: NAME GC in DDO 78

Simbad objects: 28

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Number of rows : 28

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	NGC 362	GlC	01 03 14.26	-70 50 55.6			6.58			~	1045	0
2	Cl Pal 1	GlC	03 33 20.04	+79 34 51.8		17.2				~	233	1
3	HD 42979	PM*	06 15 22.1415626952	+35 00 42.792655104		9.70	9.16			F8V	4	0
4	V* HS Aur	SB*	06 51 18.4766820936	+47 40 24.176766540		10.85	10.05			G5(N)	88	0
5	NGC 2419	GlC	07 38 08.51	+38 52 54.9			10.05			~	908	0
6	* 34 Lyn	PM*	08 41 01.0699086744	+45 50 02.421127212		6.344	5.359			G8IV	103	0
7	G 115-22	PM*	08 44 05.0087681881	+36 14 43.799478355		11.54		10.6		G0	45	0
8	BD+45 1763	*	09 46 49.7841635904	+45 04 12.470418372		10.36	9.82			F8V	13	0
9	NGC 2976	GiP	09 47 15.458	+67 54 58.97	11.77	11.03	10.16	9.51		~	648	1
10	NAME M 81-82 Group	GrG	09 55	+69.1						~	695	0
11	M 81	Sy2	09 55 33.1726556496	+69 03 55.062505368		7.89	6.94			~	4317	3
12	M 82	IG	09 55 52.430	+69 40 46.93	9.61	9.30	8.41			~	5723	6
13	LEDA 28731	G	09 57 03.0	+68 35 31		15.17				~	108	1
14	NGC 3077	GiP	10 03 19.0965510921	+68 44 01.556166166	11.23	10.85	10.14	9.74		~	747	0
15	LEDA 30664	G	10 26 28.0	+67 39 35		15.8				~	75	1
16	HD 91739	*	10 35 48.1621394832	+13 38 36.286489320		9.87	9.40			G0	7	0
17	Feige 34	HS*	10 39 36.7358839104	+43 06 09.212615280	9.613	10.91	11.14	11.319	11.464	sdOp	664	0
18	HD 96950	*	11 10 39.3852804840	+58 53 36.598903404		10.07	9.04			G8IV	13	0
19	NGC 4147	GlC	12 10 06.149	+18 32 31.78		11.45	10.74			~	553	0
20	HD 108847	PM*	12 30 17.6088210696	+30 59 39.713599356		10.05	9.07	8.4		K4V	40	0
21	BD+31 2378	PM*	12 31 38.8940414040	+31 00 59.438238768		10.77	10.00			G5V:	10	0
22	HZ 44	HS*	13 23 35.2629445608	+36 07 59.544140304	10.186	11.42	11.65	12.00	11.995	sdBN0VIIHe28	407	0
23	M 3	GlC	13 42 11.62	+28 22 38.2			6.39			~	2427	0
24	* chi Her	PM*	15 52 40.5410491705	+42 27 05.462878877	5.19	5.19	4.62	4.14	3.82	F8VFe-2Hdel-1	499	0
25	HD 152792	PM*	16 53 32.3286092107	+42 49 29.476480157		7.46		6.4		G0V	140	0
26	BD+28 4211	HS*	21 51 11.0221915656	+28 51 50.367627468	8.922	10.25	10.58	10.656	10.831	sdO2VIIIHe5	785	0
27	NAME Local Group	GrG	~	~						~	8047	0
28	NAME GC in DDO 78	GlC	~	~						~	1	0

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