2018MNRAS.475..257M

Query : 2018MNRAS.475..257M

2018MNRAS.475..257M - Mon. Not. R. Astron. Soc., 475, 257-265 (2018/March-3)

AGB subpopulations in the nearby globular cluster NGC 6397.

MacLEAN B.T., CAMPBELL S.W., DE SILVA G.M., LATTANZIO J., D'ORAZI V., COTTRELL P.L., MOMANY Y. and CASAGRANDE L.

Abstract (from CDS):

It has been well established that Galactic Globular clusters (GCs) harbour more than one stellar population, distinguishable by the anticorrelations of light-element abundances (C-N, Na-O, and Mg-Al). These studies have been extended recently to the asymptotic giant branch (AGB). Here, we investigate the AGB of NGC 6397 for the first time. We have performed an abundance analysis of high-resolution spectra of 47 red giant branch (RGB) and eight AGB stars, deriving Fe, Na, O, Mg, and Al abundances. We find that NGC 6397 shows no evidence of a deficit in Na-rich AGB stars, as reported for some other GCs - the subpopulation ratios of the AGB and RGB in NGC 6397 are identical, within uncertainties. This agrees with expectations from stellar theory. This GC acts as a control for our earlier work on the AGB of M4 (with contrasting results), since the same tools and methods were used.

Journal keyword(s): stars: abundances - stars: AGB and post-AGB - Galaxy: abundances - Galaxy: formation - globular clusters: general

VizieR on-line data: <Available at CDS (J/MNRAS/475/257): table1.dat table5.dat>

Simbad objects: 72

Full paper

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Number of rows : 72

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 288	GlC	00 52 45.24	-26 34 57.4		10	8.13			~	1130	0
3	NGC 362	GlC	01 03 14.26	-70 50 55.6			6.58			~	1167	0
4	NGC 1851	GlC	05 14 06.76	-40 02 47.6						~	1529	0
5	NGC 2808	GlC	09 12 03.10	-64 51 48.6						~	1540	0
6	M 3	GlC	13 42 11.62	+28 22 38.2			6.39			~	2593	0
7	M 5	GlC	15 18 33.22	+02 04 51.7			5.95			~	2095	0
8	M 4	GlC	16 23 35.22	-26 31 32.7						~	1978	0
9	M 13	GlC	16 41 41.634	+36 27 40.75			5.8			~	2291	0
10	M 62	GlC	17 01 12.60	-30 06 44.5						~	668	0
11	UCAC4 183-200061	RG*	17 39 30.9661557818	-53 34 58.716856869	11.41	13.55	12.63	12.420		~	8	0
12	TYC 8729-1868-1	RG*	17 39 52.5084252408	-53 39 11.289028644	10.61	12.37	11.53			~	11	0
13	2MASS J17395992-5335191	RG*	17 39 59.9373636144	-53 35 19.251317328	10.96	13.010	12.085			~	10	0
14	NGC 6397 591	RG*	17 40 02.1763539336	-53 46 31.574296920	11.36	13.53	12.59			~	12	0
15	2MASS J17400552-5339493	RG*	17 40 05.5322018280	-53 39 49.433137452	10.94	12.991	12.078			~	12	0
16	2MASS J17400658-5340283	RG*	17 40 06.5934479472	-53 40 28.420427280	11.31	13.297	12.422			~	9	0
17	TYC 8729-2215-1	RG*	17 40 06.6584559504	-53 35 00.216382164	10.59	13.15	11.73	11.622		~	8	0
18	TYC 8729-1613-1	RG*	17 40 07.2762380808	-53 42 32.323385808	9.79	12.54	11.21			~	8	0
19	2MASS J17401170-5339263	RG*	17 40 11.7153385608	-53 39 26.461484424	11.42	13.434	12.545			~	6	0
20	2MASS J17401283-5343118	RG*	17 40 12.8326520928	-53 43 11.931069108	11.39	13.435	12.540			~	9	0
21	NGC 6397 428	RG*	17 40 15.2617950648	-53 40 15.042604836	10.14	12.56	11.48	11.247		~	40	0
22	CPD-53 8708	RG*	17 40 20.1710551800	-53 42 01.828844568	10.87	11.38	10.03			~	27	0
23	TYC 8729-2587-1	RG*	17 40 20.5174518312	-53 42 44.411485824	10.81	13.12	12.13			~	6	0
24	2MASS J17402547-5347570	AB*	17 40 25.4847048816	-53 47 56.967610920	10.37	12.53	12.00			~	2	0
25	2MASS J17402687-5340236	RG*	17 40 26.8787718816	-53 40 23.751993216	11.29	13.354	12.472			~	3	0
26	TYC 8729-2096-1	RG*	17 40 27.9241725744	-53 37 09.355017576	9.24	11.94	10.71	10.444		~	7	0
27	2MASS J17402849-5341018	RG*	17 40 28.4980678392	-53 41 01.916029032	11.36	13.411	12.537			~	7	0
28	2MASS J17402864-5338323	RG*	17 40 28.6444798344	-53 38 32.422229340	10.44	12.81	11.771			~	7	0
29	2MASS J17403068-5342258	RG*	17 40 30.6930237960	-53 42 25.918487820	10.84	12.971	12.067			~	11	0
30	UCAC4 182-192984	RG*	17 40 32.7622491066	-53 40 31.507495198	10.70	12.99	11.99	11.773		~	7	0
31	2MASS J17403378-5344202	RG*	17 40 33.7867370016	-53 44 20.313760128	10.95	13.098	12.176			~	7	0
32	2MASS J17403507-5335244	AB*	17 40 35.0748769392	-53 35 24.544947516	9.51	12.09	10.92			~	1	0
33	2MASS J17403510-5339572	AB*	17 40 35.1043283069	-53 39 57.352207350	10.57	12.76	11.83	11.600		~	2	0
34	2MASS J17403681-5340546	RG*	17 40 36.8209854024	-53 40 54.764939352	11.40	13.425	12.559			~	3	0
35	Cl* NGC 6397 K 8958	RG*	17 40 38.9239088784	-53 45 25.375389300	8.85	11.47	10.42			~	8	0
36	Cl* NGC 6397 V U	RG*	17 40 40.1400337608	-53 30 58.894532712	10.19	12.59	11.53			~	8	0
37	UCAC4 182-193366	mul	17 40 40.247736	-53 41 52.67220	11.35	13.52	12.58	12.181		~	2	0
38	2MASS J17404076-5341046	AB*	17 40 40.7689564572	-53 41 04.683666713	9.79	12.24	11.16	10.959		~	1	0
39	NGC 6397	GlC	17 40 42.09	-53 40 27.6			5.17			~	2103	0
40	2MASS J17404350-5339310	RG*	17 40 43.5092445024	-53 39 31.121648064	10.06	12.391	11.379			~	3	0
41	TYC 8729-925-1	RG*	17 40 44.7678936552	-53 44 05.904028248	10.32	12.77	11.75			~	10	0
42	Cl* NGC 6397 V G	RG*	17 40 45.7272494184	-53 47 45.512497284	11.04	13.25	12.29			~	7	0
43	2MASS J17404627-5328593	RG*	17 40 46.2732913872	-53 28 59.415722868	11.30	13.318	12.446			~	7	0
44	2MASS J17404661-5342414	RG*	17 40 46.6184470584	-53 42 41.512992984	11.39	13.449	12.575			~	7	0
45	2MASS J17404680-5336326	RG*	17 40 46.8116312808	-53 36 32.626684368	11.37	13.458	12.565			~	11	0
46	2MASS J17404777-5339454	RG*	17 40 47.7727169184	-53 39 45.427222080	10.18	12.491	11.494			~	3	0
47	CPD-53 8723	RG*	17 40 48.1177241464	-53 40 17.354094885	9.25	11.94	10.71	10.479		~	2	0
48	UCAC4 182-193824	RG*	17 40 49.0448693036	-53 46 01.788733631	11.41	13.578	12.722	12.491		~	6	0
49	UCAC4 182-193981	RG*	17 40 52.2949808219	-53 44 17.868409137	11.01	13.200	12.311	12.116		~	6	0
50	2MASS J17405254-5341049	AB*	17 40 52.5426574210	-53 41 05.007280311	10.75	12.90	11.98	11.901		~	2	0
51	TYC 8729-2602-1	RG*	17 40 54.0015545736	-53 39 27.126933120	11.06	13.20	12.39			~	3	0
52	2MASS J17405674-5337019	RG*	17 40 56.7468454019	-53 37 02.026080942	11.26	13.45	12.51			~	6	0
53	TYC 8729-2167-1	RG*	17 40 57.3645096528	-53 39 47.371174308	9.54	12.12	11.09			~	9	0
54	TYC 8729-1876-1	RG*	17 41 02.8363947624	-53 45 15.561235512	10.47	12.53	11.47			~	5	0
55	TYC 8729-1683-1	RG*	17 41 03.4781194896	-53 39 39.931232076	10.18	12.87	11.78			~	10	0
56	2MASS J17410347-5342121	RG*	17 41 03.4840704912	-53 42 12.301022160	11.38	13.452	12.561			~	6	0
57	2MASS J17410415-5338161	RG*	17 41 04.1687596656	-53 38 16.176118812	11.37	13.458	12.580			~	6	0
58	Cl* NGC 6397 V K	RG*	17 41 04.7782039392	-53 48 27.726365952	10.19	12.82	11.86			~	7	0
59	2MASS J17410896-5337324	RG*	17 41 08.9617053864	-53 37 32.575707444	11.09	13.225	12.324			~	10	0
60	UCAC2 8653492	RG*	17 41 09.1104392376	-53 39 14.647580208	9.78	12.32	11.18	10.848	9.83	~	12	0
61	UCAC4 182-194570	RG*	17 41 13.3510926941	-53 37 33.469662128	10.92	13.01	12.11	11.963		~	5	0
62	UCAC4 182-194610	RG*	17 41 16.1114792487	-53 36 18.839854385	11.09	13.275	12.355	12.153		~	6	0
63	NGC 6397 685	RG*	17 41 42.6510305184	-53 43 17.428792512	10.65	12.94	11.93			~	16	0
64	CPD-53 8735	RG*	17 41 48.4031934792	-53 40 35.303669184	9.24	11.999	10.74	10.535		CEMP	16	0
65	TYC 8729-1775-1	RG*	17 41 53.4847045200	-53 33 25.444475928		11.72	10.55			~	5	0
66	TYC 8729-1843-1	RG*	17 42 12.1863815112	-53 44 44.003727456	10.25	12.46	11.48			~	5	0
67	UCAC4 184-192621	RG*	17 42 13.3801417150	-53 23 37.057489280	10.81	13.287	12.249	12.028		~	1	0
68	2MASS J17421570-5343061	AB*	17 42 15.7070471592	-53 43 06.179407068	9.98	12.63	11.71			~	3	0
69	NGC 6752	GlC	19 10 52.11	-59 59 04.4						~	2121	0
70	M 55	GlC	19 39 59.71	-30 57 53.1			6.49			~	913	0
71	M 2	GlC	21 33 27.02	-00 49 23.7			6.25			~	1114	1
72	NAME Galactic Bulge	reg	~	~						~	4794	0

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