2000A&A...356..118W


Query : 2000A&A...356..118W

2000A&A...356..118W - Astronomy and Astrophysics, volume 356, 118-126 (2000/4-1)

Spectral classification and reddening in the young open cluster NGC 6913.

WANG J.-J. and HU J.-Y.

Abstract (from CDS):

Spectroscopic observations have been made for the young open cluster NGC 6913. In total, the spectra of 100 stars of the cluster, having membership probability greater than 50%, have been obtained and classified. Reddening is estimated on the basis of spectral classification. The variable extinction across NGC 6913 is analyzed and discussed. From the spectroscopic observations, it is found that the spectral type distribution in our sample covers from O7 to K3. There are only 2 O-type stars in this OB association. 40 and 33 percent of the total stars are B and A type stars respectively, and the F, G, K stars amount to 25 percent. An extreme variation of extinction is found across the young open cluster NGC 6913. The distribution of extinction in the region is correlated with the effective temperature of the stars for stars earlier than F8. It is found that extinction in the cluster center is relatively homogeneous, but very large. The north and south of this cluster have the largest extinction. The eastern and western parts seem to be low reddening regions. A mean distance modulus of 10.17±0.14mag. is derived for the cluster, which corresponds to a distance of 1.08kpc. A large part of the values of interstellar reddening of the stars in NGC 6913 from spectral classification are quite different from those taken from photometry (especially for early B and F type stars); the largest discrepancy amounts to 1.48mag.. Depending on a reddening method, a total amount of 30% of the stars with membership probability greater than 50% can be evaluated to be probable ``non-members" of the cluster. In addition, some interesting objects are found in this study. Further observations for these stars will be made in the future.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - ISM: dust, extinction - Galaxy: open clusters and associations: general

Simbad objects: 104

goto View the references in ADS

Number of rows : 104
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 6823 OpC 19 43 11 +23 19.3   7.71 7.1     ~ 259 2
2 Ass Cyg OB 1 As* 20 17.8 +37 38           ~ 259 1
3 HD 229121 * 20 22 10.7581643976 +38 33 23.294072448   10.42 10.11     ~ 8 0
4 NGC 6913 217 * 20 22 17.0869788456 +38 42 27.566075556 13.77 13.85 13.01     B3 8 0
5 Cl* NGC 6913 KJ 37 * 20 22 19.5306016272 +38 27 31.064239152   14.10 13.39     A2IV 5 0
6 Cl* NGC 6913 KJ 38 * 20 22 20.8869556536 +38 24 15.891602112   13.25 11.90     F2III 6 0
7 HD 194094 * 20 22 20.9580075912 +38 43 29.470174176 9.22 9.57 9.05     O8.5III 39 0
8 Cl* NGC 6913 KJ 41 * 20 22 22.7795173128 +38 32 56.100231096   13.95 13.38     A5: 6 0
9 Cl* NGC 6913 KJ 44 * 20 22 27.9260225808 +38 46 51.557924028   10.78 10.42     B2V 7 0
10 Cl* NGC 6913 KJ 45 * 20 22 29.3704052160 +38 17 15.561061440   14.46 13.07     B2III 5 0
11 Cl* NGC 6913 KJ 46 * 20 22 31.1875597008 +38 25 07.950389304   14.82 12.97     K2III 5 0
12 Cl* NGC 6913 KJ 48 * 20 22 32.7187440696 +38 42 15.347063700   12.61 12.20     F5III 5 0
13 Cl* NGC 6913 KJ 50 * 20 22 34.9395134520 +38 24 45.362861424   13.97 13.28     A0IVe 5 0
14 Cl* NGC 6913 KJ 52 * 20 22 35.4579582240 +38 39 15.383998404   12.15 10.68     K0III 7 0
15 Cl* NGC 6913 KJ 51 * 20 22 36.0252117360 +38 25 22.476395532   14.15 13.41     A2IV 5 0
16 Cl* NGC 6913 KJ 54 * 20 22 38.0017704648 +38 47 26.505013308   14.24 13.23     F9III 4 0
17 Cl* NGC 6913 KJ 53 V* 20 22 38.6928979896 +38 17 10.198855968   14.40 13.60     A8III 5 0
18 Cl* NGC 6913 KJ 60 * 20 22 44.6870907840 +38 39 40.778707140   11.38 10.73     B8III 7 0
19 Cl* NGC 6913 KJ 61 * 20 22 47.5162479427 +38 23 49.831083913   14.11 13.28     A2IV 5 0
20 Cl* NGC 6913 KJ 64 * 20 22 47.8974584088 +38 45 32.101519464   14.03 13.40     B8 6 0
21 Cl* NGC 6913 KJ 63 * 20 22 48.9078375456 +38 22 36.917167044   14.15 13.59     F8III 5 0
22 NGC 6913 261 * 20 22 51.7067521872 +38 29 39.139409220   14.03 13.25 12.95   F5 6 0
23 NGC 6913 127 * 20 22 51.9150610344 +38 41 50.825546880   10.71 10.16     B3V 8 0
24 Cl* NGC 6913 KJ 70 * 20 22 53.7768648384 +38 39 57.410847540   13.65 13.14     A5 6 0
25 NGC 6913 116 * 20 22 56.516 +38 29 03.97   12.48 11.96     ~ 5 0
26 Cl* NGC 6913 KJ 77 * 20 22 58.6543765992 +38 44 24.199345968   13.86 13.03     B5IV 5 0
27 Cl* NGC 6913 KJ 78 * 20 22 59.8453498368 +38 25 42.200338332   13.49 12.61     A2V 4 0
28 HD 229171 bC* 20 23 02.8776001824 +38 27 20.847173112 9.54 9.81 9.380     B0.5III:n 37 0
29 Cl* NGC 6913 KJ 82 * 20 23 03.4716242088 +38 41 20.962777452   13.51 13.18     ~ 6 0
30 NGC 6913 118 * 20 23 04.6916933688 +38 32 36.456744804   12.24 11.52     ~ 8 0
31 Cl* NGC 6913 SAND 76 * 20 23 05.8512717552 +38 25 46.593871536   14.47 13.67     B9IV 7 0
32 NGC 6913 126 * 20 23 11.7766684680 +38 40 41.410630848   11.16 10.78     F2III 12 0
33 Cl* NGC 6913 SAND 92 * 20 23 17.8051178208 +38 24 36.519058872     13.62     F2III 3 0
34 NGC 6913 47 * 20 23 21.4007444808 +38 34 50.312009172   13.59 12.98     A2IV 8 0
35 NGC 6913 46 * 20 23 22.7664872664 +38 33 05.350269276   11.95 11.40     F5 11 0
36 NGC 6913 44 * 20 23 24.0004892064 +38 31 20.102308824   14.52 12.81     G7II 7 0
37 NGC 6913 39 * 20 23 24.5149342680 +38 26 19.306131900   14.33 13.57     ~ 8 0
38 Cl* NGC 6913 KJ 102 * 20 23 25.2072341664 +38 24 56.379374460   14.88 13.17     ~ 7 0
39 Cl* NGC 6913 KJ 104 * 20 23 27.5138593008 +38 16 58.053175464   14.47 13.70     B4IV 7 0
40 NGC 6913 40 * 20 23 27.8675522832 +38 29 00.587235552   13.08 12.64     ~ 11 0
41 NGC 6913 101 * 20 23 28.5934294848 +38 19 56.397102312   11.67 11.19     ~ 5 0
42 NGC 6913 37 * 20 23 33.736 +38 27 30.50   12.65 11.98     ~ 10 0
43 Cl* NGC 6913 SAND 111 * 20 23 37.7742189864 +38 18 53.670880728   14.60 13.84     B3V 4 0
44 NGC 6913 35 * 20 23 39.2515378464 +38 25 16.460012460   13.94 13.20     B5 12 0
45 Cl* NGC 6913 SAND 116 * 20 23 39.6624729384 +38 21 31.347682488   14.45 13.84     ~ 6 0
46 NGC 6913 49 V* 20 23 40.9071699456 +38 37 43.697905320   14.52 13.50     ~ 8 0
47 Cl* NGC 6913 KJ 113 V* 20 23 41.9924788752 +38 38 06.327020688   13.76 13.78     ~ 7 0
48 Cl* NGC 6913 KJ 116 V* 20 23 43.0305094128 +38 44 53.861542440   12.62 12.18     A5V 5 0
49 Cl* NGC 6913 KJ 114 * 20 23 43.0743444744 +38 20 20.774331600   14.68 13.55     ~ 7 0
50 NGC 6913 8 * 20 23 45.4405675848 +38 28 34.955718960   12.93 12.17     A5V 16 0
51 HD 229221 Be* 20 23 45.9618575808 +38 30 03.153877668 9.95 10.05 9.281     B0.2IIIe 68 0
52 NGC 6913 22 * 20 23 46.2434288064 +38 31 16.205410704   13.00 12.15     B4V 17 0
53 M 29 OpC 20 23 46 +38 29.2   7.30 6.6     ~ 230 0
54 NGC 6913 7 * 20 23 48.8910280680 +38 30 03.790626624   12.99 12.10     B3 13 0
55 Cl* NGC 6913 KJ 122 * 20 23 49.6318770552 +38 21 29.590469280   13.75 13.16     ~ 6 0
56 NGC 6913 29 * 20 23 50.8353117792 +38 28 17.556374460   13.69 12.90     B4IV 14 0
57 V* V2031 Cyg EB* 20 23 51.0097880664 +38 29 34.282264164   8.97 8.645     F0III 48 0
58 NGC 6913 174 V* 20 23 52.1941466712 +38 44 39.000683184   14.61 13.53     ~ 7 0
59 HD 229227 * 20 23 55.0236831408 +38 27 58.857403176 10 9.98 9.36     O9.7III(n) 62 0
60 NGC 6913 27 * 20 23 55.0773217056 +38 29 08.056932036   11.76 11.47     B2V 20 0
61 NGC 6913 50 V* 20 23 55.8475513056 +38 36 54.100200816   14.21 13.15     ~ 10 0
62 NGC 6913 12 * 20 23 57.5027873712 +38 30 34.746602400   13.73 12.86     B2 15 0
63 NGC 6913 32 * 20 23 58.7287331592 +38 25 57.216186048   12.97 11.88     B1-1.5V 20 0
64 NGC 6913 13 * 20 23 58.9788139800 +38 29 46.552193520   14.42 13.52     B5 12 0
65 BD+38 4067 * 20 23 59.5420616568 +38 31 48.010610676 10.82 10.79 10.24     B0.5III 36 0
66 NGC 6913 14 * 20 23 59.6666876880 +38 30 09.505154016   12.31 11.85     B8 17 0
67 HD 229234 SB* 20 24 01.2995078760 +38 30 49.566276036 9.5 9.58 8.94     O9III 72 0
68 EM* AS 414 Em* 20 24 02.2626266880 +38 39 38.096093628   13.80 12.57     B5e 12 0
69 NGC 6913 28 * 20 24 03.2060808144 +38 28 16.210936056   13.30 12.54     B3 12 0
70 NGC 6913 51 V* 20 24 03.2657810304 +38 36 04.226374188 9.49 9.69 8.91     ~ 12 0
71 NGC 6913 34 * 20 24 03.5716355352 +38 24 10.022390424   14.28 12.96     ~ 11 0
72 HD 229238 s*b 20 24 04.6591638600 +38 32 17.278533708 9.72 9.70 8.942     B0.5Ia 60 0
73 HD 229239 Em* 20 24 06.5477540424 +38 29 33.170317728 9.83 9.73 9.05     B0.2III 77 0
74 NGC 6913 61 * 20 24 17.2197317112 +38 29 51.093199104   14.48 13.67 13.45   ~ 10 0
75 NGC 6913 57 V* 20 24 17.2450457520 +38 31 13.723919004   12.92 11.859     G6III 18 0
76 NGC 6913 60 * 20 24 18.5314021944 +38 29 58.407118476   14.87 13.20     ~ 10 0
77 NGC 6913 87 * 20 24 20.1375328056 +38 18 18.599894352   11.28 10.79     ~ 7 0
78 NGC 6913 55 * 20 24 22.7308218912 +38 33 22.737825396   12.87 12.35     ~ 10 0
79 Cl* NGC 6913 KJ 155 * 20 24 24.8339468520 +38 40 25.363739820   14.11 13.80     ~ 4 0
80 HD 229253 * 20 24 25.2258038448 +38 29 06.867238128 9.98 10.32 10.155     A2 29 0
81 NGC 6913 65 * 20 24 25.4979778008 +38 28 30.997553124   13.33 12.80     ~ 9 0
82 NGC 6913 183 * 20 24 28.1121566928 +38 29 26.170298916   14.85 13.84     K3III 8 0
83 NGC 6913 115 * 20 24 30.7617213456 +38 27 46.868523264   14.29 13.74     ~ 9 0
84 HD 229261 * 20 24 32.7712700640 +38 30 38.936945520 10.51 10.82 10.57     B8 23 0
85 Cl* NGC 6913 KJ 164 * 20 24 36.4667182200 +38 19 41.949747408   13.71 12.65     ~ 7 0
86 NGC 6913 79 * 20 24 39.9024514560 +38 21 46.490874984   13.25 12.70     ~ 8 0
87 NGC 6913 84 * 20 24 41.4677983368 +38 17 19.341998376   12.01 11.38     ~ 6 0
88 Cl* NGC 6913 KJ 167 * 20 24 47.4678506784 +38 18 45.657261900   13.88 13.32     F5 6 0
89 NGC 6913 82 * 20 24 50.3682971544 +38 18 34.604515440   12.96 11.53     ~ 6 0
90 Cl* NGC 6913 KJ 172 * 20 24 58.0668948600 +38 25 04.771279632   13.24 12.41     ~ 6 0
91 Cl* NGC 6913 SAND 198 * 20 24 58.5273681048 +38 25 34.126120992     13.56     G9III 3 0
92 Cl* NGC 6913 KJ 174 * 20 24 59.9347420296 +38 26 05.065927440   13.53 12.77     ~ 7 0
93 Cl* NGC 6913 KJ 175 * 20 25 06.3265673040 +38 48 43.134603228   12.49 11.76     G2III 6 0
94 Cl* NGC 6913 KJ 176 * 20 25 07.5452391240 +38 19 28.517153088   12.81 12.01     A5IV 7 0
95 NGC 6913 168 * 20 25 08.4448769736 +38 36 27.046547748   12.51 12.08     ~ 8 0
96 NGC 6913 70 * 20 25 08.6590759032 +38 29 23.143215624   12.71 12.22     ~ 7 0
97 HD 229283 ** 20 25 12.4142245752 +38 45 56.501455716   11.369 11.113 11.115   ~ 9 0
98 Cl* NGC 6913 KJ 181 * 20 25 12.6444587736 +38 43 09.183900648   14.37 13.34     G3III 4 0
99 Cl* NGC 6913 KJ 182 * 20 25 13.951 +38 38 02.02   12.99 12.45     ~ 7 0
100 Cl* NGC 6913 KJ 183 * 20 25 17.3197170720 +38 39 36.097929720   13.64 12.93     A8III 5 0
101 Cl* NGC 6913 KJ 185 * 20 25 22.3823637936 +38 47 25.652472828   13.53 11.90     B2V 6 0
102 Cl* NGC 6913 KJ 186 * 20 25 25.3706006976 +38 29 38.689852128   13.06 12.42     A1IV 5 0
103 Cl* NGC 6913 KJ 187 * 20 25 26.8596600480 +38 47 22.729256376   13.29 12.84     B8V 5 0
104 Cl* NGC 6913 KJ 191 * 20 25 36.9317184696 +38 44 31.156500120     12.28     B4IV 4 0

To bookmark this query, right click on this link: simbad:objects in 2000A&A...356..118W and select 'bookmark this link' or equivalent in the popup menu


2022.05.24-09:08:18

© Université de Strasbourg/CNRS

    • Contact