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


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.11CET14:56:24

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. RV=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

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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 - 2020
#notes
1 NAME Sgr I Window reg 17 56 -29.0           ~ 63 0
2 Cl* NGC 6530 VAJ 1 * 18 02 21.5234834065 -24 15 00.502240608     13.07     ~ 4 0
3 Cl* NGC 6530 VAJ 2 * 18 02 22.9038141103 -24 25 39.051421274     13.15     ~ 4 0
4 CD-24 13785 * 18 02 39.7781427920 -24 14 47.547709578 7.92 9.27 9.13 9.45   OB 24 0
5 M 20 OpC 18 02 42 -22 58.3           ~ 389 1
6 NGC 6530 212 * 18 02 42.712 -24 17 23.74   13.36 12.70     ~ 5 0
7 NGC 6530 211 * 18 02 43.0291699161 -24 18 11.275351105   12.63 12.43     ~ 7 0
8 NGC 6530 210 * 18 02 46.9813837587 -24 20 30.324865438   12.51 12.28     ~ 7 0
9 NGC 6530 300 * 18 02 48.2031829752 -24 14 40.437886371   14.52 13.52     ~ 3 0
10 V* V5098 Sgr Or* 18 02 50.8918890223 -24 16 17.182536151   13.80 13.12 13.28   ~ 8 0
11 Cl* NGC 6530 SJ 5 * 18 02 51.8279728235 -24 37 31.896538090   13.04 12.65     ~ 6 0
12 2MASS J18025372-2409456 EB* 18 02 53.7240126029 -24 09 45.635853124 12.52 12.48 11.43     ~ 9 0
13 Cl* NGC 6530 VAJ 55 * 18 02 54.7221687232 -24 37 41.057238869     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 06.3959441644 -24 15 42.688629176   13.01 12.36     ~ 7 0
16 NGC 6530 200 * 18 03 06.9592978245 -24 24 38.991401172   13.11 12.82     ~ 7 0
17 NGC 6523 Cl* 18 03.2 -24 23           ~ 184 1
18 Cl* NGC 6530 SJ 10 * 18 03 13.9391328210 -24 07 28.060644494   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 NGC 6530 181 * 18 03 25.9688701891 -24 22 34.863682045   13.20 12.66     ~ 9 0
21 NGC 6530 244 * 18 03 26.1552591365 -24 13 32.216358964   13.33 12.05     ~ 8 0
22 Cl* NGC 6530 SJ 13 * 18 03 26.3236674231 -24 06 26.209978732   12.02 11.70     ~ 6 0
23 NGC 6530 241 * 18 03 26.7199812259 -24 12 45.657726063   12.10 11.86   11.38 ~ 9 0
24 NGC 6530 178 * 18 03 28.5813201110 -24 23 02.830150492   12.18 10.94     K4III 10 0
25 Cl* NGC 6530 SJ 16 * 18 03 31.6193222751 -24 36 35.181561424   13.14 11.89     ~ 6 0
26 M 8 HII 18 03 37 -24 23.2           ~ 549 1
27 CD-24 13810 * 18 03 45.0957087961 -24 22 05.323245530 9.67 10.13 9.95 10.17 9.54 OB- 22 0
28 [BNM2013] 7.04 333 * 18 03 50.6223825031 -24 21 00.192889725 12.986 12.496 12.240   11.870 ~ 10 0
29 EM* LkHA 108 Em* 18 03 50.7579443393 -24 21 10.839745849 12.541 12.137 11.714   11.003 ~ 18 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 54.2918534765 -24 23 04.915281057   12.433 12.181   11.832 ~ 9 0
32 HD 164816 Be* 18 03 56.8425960137 -24 18 45.119229391 6.17 7.06 6.986 8.08 6.989 O9.5V+B0V 134 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 01.2551034636 -24 23 47.402591651   11.75 11.58     B7V 12 0
35 [BNM2013] 7.04 295 * 18 04 01.2831230252 -24 26 29.264921548 11.974 11.646 11.446   11.157 B5.5V 14 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 04.1759828237 -24 28 32.074420183 14.13 14.454 13.745   12.844 ~ 9 0
38 [BNM2013] 7.04 291 * 18 04 04.3103134051 -24 21 30.468916540 12.505 12.155 11.946   11.698 B7V 15 0
39 [BNM2013] 7.04 277 * 18 04 07.5075446369 -24 22 28.442679041 15.182 14.207 13.282   12.127 ~ 9 0
40 NGC 6530 163 * 18 04 07.852 -24 12 44.12   12.934 12.674   12.311 ~ 8 0
41 CPD-24 6151 * 18 04 09.2379781945 -24 15 43.169215782   11.545 11.406   11.199 F5 12 0
42 [BNM2013] 7.04 267 * 18 04 09.8073459388 -24 20 08.985382630 12.229 11.879 11.621   11.170 A0 13 0
43 NGC 6530 24 * 18 04 10.097 -24 24 11.39   12.069 11.868   11.541 B9 11 0
44 [BNM2013] 7.04 266 * 18 04 10.2572769354 -24 20 52.386963243 14.334 13.510 12.842   12.011 F4I 12 0
45 CPD-24 6152 * 18 04 11.1596841472 -24 21 45.176188791   10.497 10.374   10.140 B2V 18 0
46 NGC 6530 29 Or* 18 04 11.2111876608 -24 24 47.760902010 13.76 14.12 13.25 12.92 11.83 F? 12 0
47 NGC 6530 33 * 18 04 11.2916740323 -24 16 23.865104634   14.162 13.331   12.129 ~ 8 0
48 [BNM2013] 7.04 252 * 18 04 11.5832412237 -24 25 29.949728427 12.363 11.967 11.706   11.229 A0 15 0
49 M 21 OpC 18 04 13 -22 29.4           ~ 122 0
50 NGC 6530 38 * 18 04 13.8677065054 -24 13 28.116783291   12.659 12.155   11.492 A2 17 0
51 HD 315026 ** 18 04 14.5189421200 -24 14 36.851688090 8.48 9.34 9.21 9.76   B0V 26 0
52 HD 315032 * 18 04 15.0267934871 -24 23 27.715886777 9.170 9.164 9.122 9.71 9.039 B0IV 51 0
53 NGC 6530 47 * 18 04 15.7326434173 -24 14 55.382061866 13.179 12.545 12.277   11.854 ~ 14 0
54 CPD-24 6159 * 18 04 16.5695285329 -24 17 16.564717345   11.237 11.086   10.849 F8 13 0
55 [BNM2013] 7.01 97 * 18 04 16.7825936733 -24 28 37.102643516 12.277 11.803 11.580   11.102 A0 14 0
56 NGC 6530 52 * 18 04 19.5305542139 -24 14 35.361520662   12.420 12.114   11.666 A0 12 0
57 Cl* NGC 6530 VAJ 170 * 18 04 19.55 -24 35 09.8   13.58 13.02     A0 5 0
58 NGC 6530 126 * 18 04 19.9548155445 -24 30 01.633195643   13.005 11.703   10.265 K0III 8 0
59 [BNM2013] 7.04 214 * 18 04 20.5599245745 -24 24 55.496208387 14.562 13.649 13.050   12.127 G0? 16 0
60 CD-24 13829 * 18 04 21.2719 -24 21 18.111 8.47 9.48 9.45 9.65   B1.5Vne 38 0
61 [BNM2013] 7.04 204 * 18 04 21.3472141726 -24 23 35.535958244 12.485 11.857 11.572   11.093 B9 13 0
62 CD-24 13830 Ae* 18 04 22.7422060077 -24 22 09.727392811 9.41 10.183 10.016 10.11 9.624 B2Ve 38 0
63 Cl* NGC 6530 SJ 46 * 18 04 23.0850374196 -24 36 17.940257568   12.93 12.51     ~ 6 0
64 HD 315033 * 18 04 23.2281621482 -24 26 16.717071101 8.42 9.02 8.90     B1V 38 0
65 NGC 6530 316 * 18 04 23.5520538055 -24 21 16.750122459   13.742 12.660   11.309 ~ 7 0
66 CPD-24 6164 * 18 04 23.9943131053 -24 21 26.708894372 9.13 9.89 9.74 9.98   B1Ve 31 0
67 NGC 6530 61 * 18 04 24.2935093003 -24 20 59.504736098 9.8 10.424 10.282   10.028 B1V 19 0
68 NGC 6530 291 * 18 04 24.7925121237 -24 09 18.089080598   14.554 13.136   11.339 G8III 6 0
69 NGC 6530 263 * 18 04 25.0199197530 -24 27 45.250632703   11.712 11.468   10.991 B5 9 0
70 [BNM2013] 7.04 189 * 18 04 25.2764981400 -24 22 41.850897937 12.286 11.904 11.674   11.214 B5V 14 0
71 CD-24 13831 * 18 04 25.5552685429 -24 20 44.860453363 9.66 10.29 10.17     B1V 24 0
72 Cl* NGC 6530 SJ 54 * 18 04 25.72 -24 19 49.6 13.133 12.342 11.993   11.468 ~ 11 0
73 [BNM2013] 7.04 179 * 18 04 26.7357247567 -24 23 51.682144191 13.762 13.073 12.718   12.120 B8 11 0
74 CPD-24 6170 * 18 04 27.214 -24 22 49.56 10.07 10.673 10.510   10.179 B2V 17 0
75 [BNM2013] 7.04 177 * 18 04 27.2861270603 -24 19 45.683074454 15.063 14.195 13.354   12.290 ~ 8 0
76 HD 315031 SB* 18 04 28.0254548544 -24 21 42.787145059 7.68 9.17 9.09 9.16   B0.5IV/V+B1V 44 0
77 [BNM2013] 7.03 67 * 18 04 28.8667462050 -24 14 02.518375853 13.501 12.478 12.009   11.308 ~ 14 0
78 Cl* NGC 6530 SJ 58 * 18 04 28.9891154022 -24 25 26.119867200 10.891 10.817 10.695   10.422 B2.5Ve 16 0
79 Cl* NGC 6530 VAJ 205 * 18 04 29.2042584508 -24 06 13.449999364   13.78 13.13     ~ 3 0
80 HD 315024 * 18 04 29.2699228867 -24 19 25.114636250 8.9 9.77 9.68 9.92   B0IV 31 0
81 NGC 6530 151 * 18 04 29.3755871526 -24 09 34.916596987   12.986 12.153   10.888 A9 8 0
82 NGC 6530 OpC 18 04 31 -24 21.5   4.74 4.6     ~ 339 1
83 NGC 6530 131 * 18 04 31.295 -24 32 20.38   13.460 13.049   12.605 B4 9 0
84 CPD-24 6176 * 18 04 32.9187282120 -24 18 44.499091533 10 10.61 10.454 10.61 10.245 B2.5Vne 25 0
85 CD-24 13837 * 18 04 32.9905265949 -24 23 12.482207904 8.74 9.63 9.61 9.82   B1V 28 0
86 [BNM2013] 7.04 131 * 18 04 33.0515829969 -24 22 52.949947117   11.937 11.754   11.391 ~ 13 0
87 [BNM2013] 7.04 134 * 18 04 33.1087228591 -24 21 15.433644473 13.213 12.696 12.380   11.838 ~ 12 0
88 V* V5563 Sgr WU* 18 04 34.1893513554 -24 22 00.507176989 9.38 9.93 9.8     B2V 30 0
89 [BNM2013] 7.01 47 * 18 04 34.4093596125 -24 28 05.613185702 12.452 12.176 11.920   11.463 A0 14 0
90 HD 315021 * 18 04 35.9940715458 -24 19 52.032244943 8.892 8.553 8.509 9.41 8.397 B0V 49 0
91 NGC 6530 94 * 18 04 37.6621448615 -24 21 11.694853648   12.962 12.687   12.256 A 9 0
92 [BNM2013] 7.04 94 * 18 04 38.9656020524 -24 19 25.641714096   11.553 11.408   11.071 B9 15 0
93 NGC 6530 96 * 18 04 39.038 -24 22 57.45   12.417 12.186   11.803 ~ 10 0
94 CD-24 13844 * 18 04 39.913 -24 22 44.69 10.4 10.90 10.818   10.559 B7 16 0
95 HD 164947 Be* 18 04 41.70 -24 20 57.0 8.20 8.94 8.90     B1/B2Vne 42 0
96 HD 315022 * 18 04 42.79 -24 18 33.9   10.69 10.53     A3 14 0
97 Cl* NGC 6530 SJ 72 * 18 04 45.9129227960 -24 27 19.252252779   13.924 13.044   11.876 G0 10 0
98 [BNM2013] 7.04 39 * 18 04 47.4384594333 -24 18 01.414363475   12.968 12.640   12.122 K7.5-M0.5V 15 0
99 NGC 6530 110 * 18 04 47.7869939353 -24 28 24.148839516   11.465 11.221   10.834 B5 12 0
100 [BNM2013] 7.04 31 * 18 04 48.6122872162 -24 26 35.478257601 16.198 14.909 13.655   12.012 B2.5 10 0
101 NGC 6530 145 * 18 04 49.1549332201 -24 13 07.827736555   14.252 13.512   12.647 ~ 5 0
102 EM* LkHA 115 Ae* 18 04 50.5998207464 -24 25 42.096542444   12.380 11.949   11.198 B7e 24 0
103 HD 315020 * 18 04 52.7152079451 -24 17 52.604716564   11.62 11.29     A3 10 0
104 NGC 6530 158 * 18 04 53.0719161655 -24 19 28.078845293   11.747 11.502   11.100 ~ 6 0
105 HD 315034 * 18 04 56.2552768252 -24 24 03.630008173   11.984 11.712   11.250 B5 12 0
106 HD 315035 * 18 04 59.0214713266 -24 27 23.302731647   11.106 10.805   10.298 A2 19 0
107 NGC 6530 140 * 18 05 01.7093835568 -24 18 38.659303347   13.613 13.221   12.724 ~ 6 0
108 CD-24 13858 * 18 05 02.2797126807 -24 17 01.932953752   12.157 11.61   11.085 ~ 9 0
109 NGC 6530 139 * 18 05 04.1865680667 -24 25 09.570396966   13.712 12.384   10.910 K3III 6 0
110 CD-24 13862 * 18 05 08.2846482797 -24 15 33.067449754   12.001 11.711   11.293 ~ 8 0
111 Cl* NGC 6530 SJ 84 * 18 05 10.2913325142 -24 32 09.151643801   13.21 12.50     F4 4 0
112 HD 165052 SB* 18 05 10.5506202440 -24 23 54.850635234 6.16 6.98 6.87 7.77   O5.5:Vz+O8:V 245 1
113 Cl* NGC 6530 VAJ 272 * 18 05 11.3278587193 -24 24 37.386803635   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 23.2790050221 -24 20 04.302700362   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 43.3853176632 -24 29 10.721888439   13.01 12.58     A8 6 0
119 Cl* NGC 6530 SJ 89 * 18 05 52.5685872359 -24 33 44.906364530   13.24 11.91     K2III 6 0
120 Cl* NGC 6530 MMU 337 * 18 05 54.4022789394 -24 14 58.212279445   12.21 9.92     K7III 10 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 58.2940824285 -24 25 41.493268335   12.46 11.70     A8 6 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 01.6362949652 -24 13 36.264294091   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 Cl* NGC 6530 SJ 96 * 18 06 11.8 -24 20 20   14.10 13.47     B9.5 4 0
129 HD 315147 * 18 06 11.8385716369 -24 31 02.279410197 11.73 11.44 10.93 10.53   F8 19 0
130 Cl* NGC 6530 SJ 97 * 18 06 17.6744213771 -24 22 38.125951618   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 19.6766729811 -24 10 18.946866124   12.58 10.26     K7III-IV 9 0
133 Cl* NGC 6530 VAJ 342 * 18 06 22.6895233205 -24 28 10.531808310   12.96 11.84     K0III 5 0
134 Cl* NGC 6530 VAJ 347 * 18 06 26.0985066878 -24 20 41.908637167   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 39.6303391058 -24 37 56.982485464   12.84 12.10     F0 4 0
138 Cl* NGC 6530 SJ 101 * 18 06 40.4326639163 -24 34 23.958686552   13.28 12.84     ~ 3 0
139 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 920 2
140 M 18 OpC 18 19 58 -17 06.1   7.24 6.9     ~ 70 0
141 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1459 0

    Equat.    Gal    SGal    Ecl

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2019.12.11-14:56:24

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