1997A&AS..123...63V

Query : 1997A&AS..123...63V

1997A&AS..123...63V - Astron. Astrophys., Suppl. Ser., 123, 63-82 (1997/May-2)

A multiwavelength study of star formation in the very young open cluster NGC 6530.

VAN DEN ANCKER M.E., THE P.S., FEINSTEIN A., VAZQUEZ R.A., DE WINTER D. and PEREZ M.R.

Abstract (from CDS):

The distance and formation history of the very young open cluster NGC 6530 were investigated by studying a total of 132 probable member stars of this open cluster. It was concluded that the distance to NGC 6530 is 1.8±0.2kpc, and its interstellar reddening E(B-V) is 0.30mag. Furthermore, we conclude that the extinction law of the intracluster material is normal (i.e. R_V=3.1), but anomalous extinction laws were found for several more embedded stars in the cluster. Of the 132 stars included in this study, 11 are suspected to be variable, five show Hα in emission and nine show an infrared excess. Among the member stars of NGC 6530, three were found to be part of the Herbig Ae/Be stellar class, whereas two others are possible members of this stellar group as well. Also, one cluster member is probably a new massive post-AGB star, whereas the same could possibly apply to another member star. Finally, from the distribution of post- and pre-main sequence stars in the cluster's HR-diagram, it was concluded that the process of star formation in NGC 6530 must have started a few times 10⁷ years ago and, for the less massive stars, is probably still going on today.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - stars: formation - stars: pre-main sequence - dust, extinction - H II regions - open clusters and associations: individual: NGC 6530

VizieR on-line data: <Available at CDS (J/A+AS/123/63): table1 table2 table5>

Simbad objects: 141

Full paper

View the references in ADS

Number of rows : 141

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	NAME Sgr I Window	reg	17 56	-29.0						~	66	0
2	Cl* NGC 6530 VAJ 1	*	18 02 21.5235151944	-24 15 00.501145704			13.07			~	4	0
3	Cl* NGC 6530 VAJ 2	*	18 02 22.9038759120	-24 25 39.049746708			13.15			~	4	0
4	CD-24 13785	*	18 02 39.7778217240	-24 14 47.555444796	7.92	9.27	9.13	9.45		OB	25	0
5	M 20	OpC	18 02 42	-22 58.3						~	423	1
6	NGC 6530 212	*	18 02 42.6888666432	-24 17 23.587289196		13.28	12.72	12.53		~	5	0
7	NGC 6530 211	*	18 02 43.0289986992	-24 18 11.275303284		12.63	12.43			~	7	0
8	NGC 6530 210	*	18 02 46.9815316128	-24 20 30.322407552		12.51	12.28			~	7	0
9	NGC 6530 300	*	18 02 48.2031284160	-24 14 40.437480300		14.52	13.52			~	3	0
10	V* V5098 Sgr	Or*	18 02 50.8918954776	-24 16 17.182487568		13.80	13.12	13.28		~	8	0
11	Cl* NGC 6530 SJ 5	*	18 02 51.8279408736	-24 37 31.895862672		13.04	12.65			~	6	0
12	Cl* NGC 6530 VAJ 53	EB*	18 02 53.7245283048	-24 09 45.629039448	12.52	12.442	11.352	10.960		~	12	0
13	Cl* NGC 6530 VAJ 55	*	18 02 54.7221805656	-24 37 41.057146560			13.28			~	4	0
14	Cl* NGC 6530 SJ 7	*	18 03 05.5	-24 07 39		13.93	13.49			~	4	0
15	NGC 6530 219	*	18 03 06.3960084960	-24 15 42.689671164		13.01	12.36			~	7	0
16	2MASS J18030695-2424389	Y*O	18 03 06.9595086216	-24 24 38.991146256		13.11	12.82			~	9	0
17	NGC 6523	Cl*	18 03.2	-24 23						~	185	1
18	Cl* NGC 6530 SJ 10	*	18 03 13.9391617224	-24 07 28.061395752		13.98	12.66			~	4	0
19	NGC 6530 282	*	18 03 25.27	-24 09 38.2		14.43	13.49			~	5	0
20	2MASS J18032596-2422348	Y*O	18 03 25.9689014520	-24 22 34.863615660		13.20	12.66			~	10	0
21	NGC 6530 244	*	18 03 26.1553288056	-24 13 32.215893312		13.33	12.05			~	8	0
22	Cl* NGC 6530 SJ 13	*	18 03 26.3233999968	-24 06 26.207452476		12.02	11.70			~	6	0
23	NGC 6530 241	*	18 03 26.7199475952	-24 12 45.655030476		12.10	11.86		11.38	~	9	0
24	NGC 6530 178	*	18 03 28.5814954752	-24 23 02.828539896		12.18	10.94			K4III	10	0
25	Cl* NGC 6530 SJ 16	*	18 03 31.6193987376	-24 36 35.180570484		13.14	11.89			~	6	0
26	M 8	HII	18 03 37	-24 23.2						~	598	1
27	CD-24 13810	Y*O	18 03 45.0958464864	-24 22 05.325003732	9.67	10.180	10.054	10.169	9.54	B2-B4V	27	0
28	2MASS J18035063-2421001	Y*O	18 03 50.6224962240	-24 21 00.187384104	12.986	12.496	12.240		11.870	~	12	0
29	EM* LkHA 108	Em*	18 03 50.7590261472	-24 21 10.836157104	12.541	12.137	11.714		11.003	~	20	0
30	NGC 6530 123	*	18 03 53.47	-24 31 40.8	14.44	14.572	13.544		12.077	~	7	0
31	NGC 6530 168	*	18 03 54.2920887744	-24 23 04.914180564		12.433	12.181		11.832	~	10	0
32	HD 164816	Be*	18 03 56.8425865728	-24 18 45.118050552	6.17	7.006	6.986	8.08	6.989	O9.5V+B0V	148	0
33	NGC 6530 13	*	18 04 00.14	-24 15 02.6		13.779	13.343		12.805	~	9	0
34	NGC 6530 15	*	18 04 01.2551734800	-24 23 47.401378584		11.75	11.58			B7V	12	0
35	2MASS J18040129-2426292	Y*O	18 04 01.2831360288	-24 26 29.265491580	11.974	11.646	11.446		11.157	B5.5V	17	0
36	NGC 6530 16	*	18 04 02.688	-24 10 55.05		12.403	12.151		11.812	~	11	0
37	NGC 6530 121	*	18 04 04.1760090120	-24 28 32.074209876	14.13	14.454	13.745		12.844	~	9	0
38	NGC 6530 17	Y*O	18 04 04.3106114712	-24 21 30.469104324	12.505	12.155	11.946		11.698	A5-F4V	20	0
39	2MASS J18040751-2422280	Y*O	18 04 07.5077472648	-24 22 28.446146616	15.182	14.207	13.282		12.127	~	10	0
40	NGC 6530 163	*	18 04 07.852	-24 12 44.12		12.934	12.674		12.311	~	8	0
41	M 21	OpC	18 04 09	-22 30.3						~	142	0
42	CPD-24 6151	*	18 04 09.2379178752	-24 15 43.166747088		11.545	11.406		11.199	F5	12	0
43	2MASS J18040979-2420089	Y*O	18 04 09.8075962032	-24 20 08.987478864	12.229	11.879	11.621		11.170	A0	16	0
44	NGC 6530 24	*	18 04 10.0855882752	-24 24 11.337626520		12.13	11.95	12.01	11.541	B9	12	0
45	NGC 6530 27	Y*O	18 04 10.2573681048	-24 20 52.390222584	14.334	13.510	12.842		12.011	F4I	14	0
46	CPD-24 6152	Y*O	18 04 11.1598510296	-24 21 45.175823136		10.497	10.374		10.140	B2V	23	0
47	NGC 6530 29	Or*	18 04 11.2114383960	-24 24 47.756631276	13.76	14.12	13.25	12.92	11.83	F?	12	0
48	NGC 6530 33	*	18 04 11.2916730936	-24 16 23.863898244		14.162	13.331		12.129	~	8	0
49	NGC 6530 31	Y*O	18 04 11.5832911608	-24 25 29.948671200	12.363	11.967	11.706		11.229	A0	18	0
50	NGC 6530 38	*	18 04 13.8677135232	-24 13 28.116294384		12.659	12.155		11.492	A2	19	0
51	HD 315026	**	18 04 14.5189421200	-24 14 36.851688090	8.48	9.34	9.21	9.76		B0V	28	0
52	HD 315032	Y*O	18 04 15.0268429224	-24 23 27.713497344	9.170	9.164	9.122	9.71	9.039	B0IV	64	0
53	NGC 6530 47	Y*O	18 04 15.7321154184	-24 14 55.385013048	13.179	12.545	12.277		11.854	~	15	0
54	CPD-24 6159	*	18 04 16.5692775960	-24 17 16.562686488		11.237	11.086		10.849	F8	15	0
55	2MASS J18041678-2428371	Y*O	18 04 16.7820489432	-24 28 37.091010468	12.277	11.803	11.580		11.102	A0	17	0
56	NGC 6530 52	*	18 04 19.5306961272	-24 14 35.360636928		12.420	12.114		11.666	A0	12	0
57	Cl* NGC 6530 VAJ 170	*	18 04 19.5524708880	-24 35 09.442999392		13.58	13.02			A0	5	0
58	NGC 6530 126	*	18 04 19.9548109920	-24 30 01.631134260		13.005	11.703		10.265	K0III	8	0
59	NGC 6530 53	Y*O	18 04 20.5589569920	-24 24 55.498199580	14.562	13.649	13.050		12.127	F7-F9III	20	0
60	CD-24 13829	**	18 04 21.2734315416	-24 21 18.110381292	8.47	9.476	9.453	9.651		B1.5Vne	44	0
61	2MASS J18042134-2423356	Y*O	18 04 21.3472105320	-24 23 35.534480460	12.485	11.857	11.572		11.093	F2-F5III	17	0
62	CD-24 13830	Ae*	18 04 22.7421765936	-24 22 09.724518840	9.41	10.183	10.016	10.11	9.624	B2Ve	44	0
63	Cl* NGC 6530 SJ 46	*	18 04 23.0847396288	-24 36 17.933949324		12.93	12.51			~	6	0
64	HD 315033	*	18 04 23.2279355376	-24 26 16.720588140	8.42	9.02	8.90			B1V	48	0
65	NGC 6530 316	Y*O	18 04 23.5522010832	-24 21 16.749829332		13.742	12.660		11.309	G8-K0IV-V	11	0
66	CPD-24 6164	*	18 04 23.9941418688	-24 21 26.706008844	9.13	9.890	9.740	9.98		B1Ve	35	0
67	NGC 6530 61	*	18 04 24.2929429728	-24 20 59.495770896	9.8	10.424	10.282		10.028	B1V	23	0
68	NGC 6530 291	*	18 04 24.7926716496	-24 09 18.088888968		14.554	13.136		11.339	G8III	6	0
69	2MASS J18042501-2427453	Y*O	18 04 25.0200119664	-24 27 45.250495812		11.712	11.468		10.991	B5	11	0
70	NGC 6530 64	Y*O	18 04 25.2767690832	-24 22 41.849706396	12.286	11.904	11.674		11.214	G5-G9V	16	0
71	CD-24 13831	*	18 04 25.5554033664	-24 20 44.860145748	9.66	10.29	10.17			B1V	29	0
72	NGC 6530 67	Y*O	18 04 25.7230719336	-24 19 49.595224260	13.133	12.342	11.993	12.02	11.468	A5-F2III-IV	14	0
73	NGC 6530 160	Y*O	18 04 26.7357723768	-24 23 51.680947272	13.762	13.073	12.718		12.120	A5-A9V	15	0
74	CPD-24 6170	*	18 04 27.2046934608	-24 22 49.636762212	10.07	10.67	10.54	10.61	10.179	B2V	21	0
75	NGC 6530 71	Y*O	18 04 27.2862490368	-24 19 45.684100092	15.063	14.195	13.354		12.290	G0-G2IV	12	0
76	HD 315031	SB*	18 04 28.0254107904	-24 21 42.788444328	7.68	9.170	9.090	9.16		B0.5IV/V+B1V	53	0
77	2MASS J18042886-2414025	Y*O	18 04 28.8668442576	-24 14 02.534069328	13.501	12.478	12.009		11.308	~	15	0
78	NGC 6530 74	Y*O	18 04 28.9891584504	-24 25 26.121604116	10.891	10.817	10.695		10.422	B2-B5	23	0
79	Cl* NGC 6530 VAJ 205	*	18 04 29.2042140216	-24 06 13.446985968		13.78	13.13			~	3	0
80	HD 315024	*	18 04 29.2696805472	-24 19 25.110290784	8.9	9.77	9.68	9.92		B0IV	35	0
81	NGC 6530 151	*	18 04 29.3757139680	-24 09 34.914392100		12.986	12.153		10.888	A9	10	0
82	NGC 6530	OpC	18 04 31	-24 21.5						~	401	0
83	NGC 6530 131	*	18 04 31.295	-24 32 20.38		13.460	13.049		12.605	B4	9	0
84	2MASS J18043292-2418445	Y*O	18 04 32.9189018640	-24 18 44.497260936	10	10.61	10.454	10.61	10.245	B2.5Vne	31	0
85	CD-24 13837	*	18 04 32.9906237448	-24 23 12.478728588	8.74	9.630	9.610	9.82		B1V	36	0
86	NGC 6530 81	Y*O	18 04 33.0515693016	-24 22 52.949310888		11.937	11.754		11.391	A0-A5V	17	0
87	NGC 6530 82	Y*O	18 04 33.1089996312	-24 21 15.421576428	13.213	12.696	12.380		11.838	F4-F5IV-V	15	0
88	V* V5563 Sgr	EB*	18 04 34.2049522080	-24 22 00.550706448	9.38	9.93	9.8			B2V	34	0
89	2MASS J18043441-2428057	Y*O	18 04 34.4096422824	-24 28 05.612096640	12.452	12.176	11.920		11.463	A0	16	0
90	HD 315021	Y*O	18 04 35.9943009216	-24 19 52.030225308	8.892	8.553	8.509	9.41	8.397	B0V	60	0
91	NGC 6530 94	*	18 04 37.6619562816	-24 21 11.690007264		12.962	12.687		12.256	A	10	0
92	NGC 6530 97	Y*O	18 04 38.9657145072	-24 19 25.642621380		11.553	11.408		11.071	B9	17	0
93	NGC 6530 96	*	18 04 39.0275848848	-24 22 57.516517452		12.417	12.186	12.25	11.803	~	11	0
94	CD-24 13844	*	18 04 39.9049325736	-24 22 44.654595924	10.4	11.00	10.92	10.90	10.559	B7	22	0
95	HD 164947	Be*	18 04 41.65848	-24 20 56.9508	8.20					B1/B2Vne	44	0
96	HD 315022	*	18 04 42.79	-24 18 33.9		10.69	10.53			A3	14	0
97	2MASS J18044593-2427191	Y*O	18 04 45.9130691520	-24 27 19.252627164		13.924	13.044		11.876	G0	11	0
98	2MASS J18044745-2418012	Y*O	18 04 47.4380796168	-24 18 01.417340232		12.968	12.640		12.122	K7.5-M0.5V	17	0
99	NGC 6530 110	*	18 04 47.7868368648	-24 28 24.146578092		11.465	11.221		10.834	B5	12	0
100	2MASS J18044863-2426354	Y*O	18 04 48.6125951496	-24 26 35.476208772	16.198	14.909	13.655		12.012	B2.5	12	0
101	NGC 6530 145	*	18 04 49.1549512896	-24 13 07.827638160		14.252	13.512		12.647	~	5	0
102	EM* LkHA 115	Ae*	18 04 50.5999226472	-24 25 42.095461620		12.380	11.949		11.198	B7e	28	0
103	HD 315020	*	18 04 52.7152113912	-24 17 52.604336616		11.62	11.29			A3	10	0
104	2MASS J18045308-2419279	Y*O	18 04 53.0726060448	-24 19 28.072352496		11.747	11.502		11.100	~	8	0
105	HD 315034	*	18 04 56.2550333520	-24 24 03.628435716		11.984	11.712		11.250	B5	15	0
106	HD 315035	Y*O	18 04 59.0214440664	-24 27 23.301208908		11.106	10.805		10.298	A2	23	0
107	2MASS J18050172-2418385	Y*O	18 05 01.7092706424	-24 18 38.678969052		13.613	13.221		12.724	~	8	0
108	CD-24 13858	*	18 05 02.2828604760	-24 17 01.905384660		12.157	11.61		11.085	~	9	0
109	NGC 6530 139	*	18 05 04.1866100976	-24 25 09.570530928		13.712	12.384		10.910	K3III	6	0
110	CD-24 13862	*	18 05 08.2847254008	-24 15 33.066465624		12.001	11.711		11.293	~	8	0
111	Cl* NGC 6530 SJ 84	*	18 05 10.2913933056	-24 32 09.150395172		13.21	12.50			F4	4	0
112	HD 165052	SB*	18 05 10.5506592816	-24 23 54.847798080	6.16	6.98	6.87	7.77		O5.5:Vz+O8:V	262	1
113	Cl* NGC 6530 VAJ 272	*	18 05 11.3281964088	-24 24 37.380313188		13.5	13.10			~	4	0
114	Cl* NGC 6530 SJ 85	*	18 05 13.836	-24 06 01.92		13.41	13.02			A0	6	0
115	Cl* NGC 6530 SJ 86	*	18 05 23.2790186016	-24 20 04.302675060		13.77	13.10			F1	6	0
116	Cl* NGC 6530 VAJ 286	*	18 05 29.8	-24 10 56	14.13	14.16	13.39			B2	5	0
117	Cl* NGC 6530 SJ 87	*	18 05 39.2	-24 07 52		13.96	13.31			B6	4	0
118	Cl* NGC 6530 SJ 88	*	18 05 43.3854224208	-24 29 10.721915088		13.01	12.58			A8	6	0
119	Cl* NGC 6530 SJ 89	*	18 05 52.5683500344	-24 33 44.906425992		13.24	11.91			K2III	6	0
120	Cl* NGC 6530 MMU 337	*	18 05 54.4029427104	-24 14 58.211182464		12.21	9.92			K7III	11	0
121	Cl* NGC 6530 SJ 91	*	18 05 54.8	-24 13 52		14.73	13.33			G2III	4	0
122	Cl* NGC 6530 SJ 92	*	18 05 58.2940069872	-24 25 41.491535592		12.46	11.70			A8	7	0
123	Cl* NGC 6530 SJ 93	*	18 06 01.3	-24 14 38		13.82	13.10			G0	4	0
124	Cl* NGC 6530 VAJ 316	*	18 06 01.5	-24 17 47			13.55			~	2	0
125	Cl* NGC 6530 SJ 94	*	18 06 01.6362924528	-24 13 36.265172772		12.72	11.94			G0	6	0
126	Cl* NGC 6530 VAJ 329	*	18 06 11.431	-24 23 52.15		12.71	12.18			F7	5	0
127	Cl* NGC 6530 VAJ 331	*	18 06 11.657	-24 19 20.77		13.43	12.77			F0	5	0
128	HD 315147	*	18 06 11.8381642320	-24 31 02.274303144	11.73	11.44	10.93	10.53		F8	20	0
129	Cl* NGC 6530 SJ 96	V*	18 06 11.97	-24 20 20.1		14.10	13.47			B9.5	5	0
130	Cl* NGC 6530 SJ 97	*	18 06 17.6747350080	-24 22 38.119147284		13.69	13.13			A8	6	0
131	Cl* NGC 6530 VAJ 337	*	18 06 17.9	-24 15 57		14.07	13.26			B5.5	3	0
132	Cl* NGC 6530 MMU 348	*	18 06 19.6765771704	-24 10 18.943818312		12.58	10.26			K7III-IV	12	0
133	Cl* NGC 6530 VAJ 342	*	18 06 22.6896440304	-24 28 10.534375812		12.96	11.84			K0III	7	0
134	Cl* NGC 6530 VAJ 347	*	18 06 26.0986249824	-24 20 41.908887348		13.35	12.77			B7	3	0
135	Cl* NGC 6530 SJ 99	*	18 06 31.3	-24 33 50		12.48	12.02			~	3	0
136	NGC 6530 239	*	18 06 33.4	-24 12 59		14.44	13.72			~	4	0
137	Cl* NGC 6530 SJ 100	*	18 06 39.6305475888	-24 37 56.974012716		12.84	12.10			F0	4	0
138	Cl* NGC 6530 SJ 101	*	18 06 40.4326239432	-24 34 23.959933284		13.28	12.84			~	3	0
139	M 16	OpC	18 18 45	-13 47.5		6.58	6.0			~	1006	2
140	M 18	OpC	18 19 57	-17 05.3						~	86	0
141	NGC 6618	OpC	18 20 47	-16 10.3						~	1580	0

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