1999AJ....117.2882W

Query : 1999AJ....117.2882W

1999AJ....117.2882W - Astron. J., 117, 2882-2894 (1999/June-0)

Multicolor polarization study of Ara OB1.

WALDHAUSEN S., MARTINEZ R.E. and FEINSTEIN C.

Abstract (from CDS):

We present the results of a multicolor polarimetric study of stars in the association Ara OB1. Several objects belonging to the clusters NGC 6204, 6193, and 6167 and the local field were observed as part of a global study of the region. The polarimetry shows that the orientation of the polarimetric vectors of each star is very similar within each cluster. The average values are 35°.5±15°.1 and 52°.2±16° for NGC 6204 and 6193, respectively. An average value of 106°.5±9°.9 is found for NGC 6167, but the angle distribution is asymmetric, and a second component can be fitted to the angle histogram (P.A.∼120°.8±11°.6), showing a behavior not observed in NGC 6204 and 6193. So, we suggest that some of the observed stars perhaps belong to another stars grouping, located behind NGC 6167 and between a dust layer with a different orientation of the grains. The large difference in the polarization angle between NGC 6167 and the other two clusters could also be explained because NGC 6167 is supposed to be at the center of a gas-expanding structure and it is possible that this cluster was the origin of the star formation process in the Ara OB1 association, triggered by stellar winds or supernova explosions.

Abstract Copyright: ∼

Journal keyword(s): ISM: Dust, Extinction - Galaxy: Open Clusters and Associations: Individual: Name: Ara OB1 - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 6167 - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 6193 - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 6204 - Techniques: Polarimetric

Nomenclature: Tables 1A, 1C, 1D: WMF NN (Nos 1-18).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 103

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Number of rows : 103
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 HD 149019 V* 16 34 23.0722613856 -49 46 11.306039412 8.43 8.30 7.43 8.02   B9/A0Iab 58 0
2 CD-49 10780 * 16 34 25.5804695184 -49 38 27.319759224 11.14 11.56 10.88 10.78   O7V 25 0
3 NGC 6167 OpC 16 34 41.4 -49 46 02   7.58 6.7     ~ 87 0
4 HD 149065 * 16 34 42.0399553248 -49 51 11.063716920 7.70 8.39 8.42 8.75   B2V 32 0
5 HD 330950 Be* 16 34 43.5422771880 -49 33 09.520080048 9.37 9.92 9.42 9.88   B1Ve 43 0
6 HD 330946 * 16 34 50.9632932552 -49 19 54.173862228 8.80 9.36 8.97 9.51   B2k 25 0
7 CD-49 10799 * 16 35 08.5706445600 -49 46 43.314081420 11.67 11.72 11.05 10.97   B0V 18 0
8 HD 149298 Be* 16 36 11.7797380488 -49 15 47.445348852 9.84 10.32 9.94 9.96   B2(II) 44 0
9 HD 149589 * 16 38 03.8932680048 -48 59 21.400073664 9.1 9.653 9.46 9.52 9.15 B2/3III 26 0
10 HD 149658 * 16 38 29.6799715848 -48 48 50.092820280 9.52 10.02 9.70 9.59 9.15 B2IV 20 0
11 Ass Ara OB 1 As* 16 39.5 -46 46           ~ 95 0
12 CD-48 11039 * 16 40 00.0882315576 -48 46 58.371343032   11.32 10.92 11.092   B3V 26 0
13 GUM 53 HII 16 40 00.1 -48 51 45           ~ 98 1
14 CD-48 11043 * 16 40 12.5410444392 -48 47 09.473524008   10.55 10.18     F2 5 0
15 GSC 08333-00200 * 16 40 43.1128348944 -48 49 28.869730392   12.37 12.12     ~ 6 0
16 HD 150041 * 16 40 44.5831489080 -48 45 22.209141924 6.39 7.16 7.07 8.05   B0II 83 0
17 CD-48 11061 * 16 40 53.2588334064 -48 45 35.222884848   11.43 11.21     B7 11 0
18 CD-48 11063 * 16 41 04.4041599768 -48 46 34.032884124   10.98 10.79     B7 14 0
19 CD-48 11065 * 16 41 08.4761998680 -48 52 21.637675668   11.28 11.03     B7 15 0
20 [HH77] 272 * 16 41 11.0718294552 -48 46 55.746762780   12.47 11.98 11.93   ~ 10 0
21 NGC 6193 OpC 16 41 14.9 -48 46 47           ~ 169 0
22 Cl* NGC 6193 HG 1175 * 16 41 21.8427430392 -48 50 42.932487804   12.36 12.08 12.11   B9 10 0
23 CD-48 11069 * 16 41 22.0940750424 -48 44 56.992596576 7.86 10.07 9.71 9.92   B0IV 31 0
24 CD-48 11071 SB* 16 41 25.8575675328 -48 45 14.265224424   8.57 8.44     B0V 30 0
25 CD-48 11072 * 16 41 26.8470301248 -48 50 47.219309196   10.86 10.76     B8 8 0
26 CD-48 11074 * 16 41 28.8572157360 -48 47 47.702194800   9.89 9.03     ~ 5 0
27 CPD-48 8709 * 16 41 29.6968312728 -48 50 10.977362196   12.01 10.80     A0 6 0
28 Cl* NGC 6193 VF 8 * 16 41 32.5490772360 -48 47 54.425873724   12.37 11.94 12.12   B9: 5 0
29 CD-48 11076 * 16 41 33.0722266848 -48 33 59.632324560 9.99 10.47 10.29 10.08 9.56 B1IV 18 0
30 CD-48 11075 * 16 41 33.2046689064 -48 45 06.634861308   10.29 10.07     B2V 22 0
31 CD-48 11077 SB* 16 41 34.9085304048 -48 46 24.152761236 10.41 10.62 10.28 10.55   B3V 27 0
32 CD-48 11078 * 16 41 35.3076689808 -48 43 21.624483684 9.72 12.06 11.73 11.77   ~ 17 0
33 Cl* NGC 6193 VF 21 * 16 41 37.6049240928 -48 52 16.573002312   12.25 11.30     ~ 4 0
34 HD 150198 * 16 41 43.8524285784 -48 03 49.165767864 8.64 8.97 8.92 9.01 8.982 B9Ib/II 22 0
35 CD-48 11082 * 16 41 46.3057846464 -48 47 41.481171600 10.03 10.6 10.4 10.06 9.947 B2IV 30 0
36 CD-48 11083 * 16 41 46.7020803456 -48 51 36.275560596   11.11 10.20     ~ 4 0
37 GSC 08330-05262 * 16 41 47.7897863376 -48 40 32.181677076   12.91 12.49     ~ 2 0
38 CD-48 11086 * 16 41 54.8205257928 -48 45 22.766172912   10.74 10.36     B7 12 0
39 Cl* NGC 6193 VF 11 * 16 41 54.8728365912 -48 46 24.699786852   13.44 11.58     ~ 3 0
40 Cl* NGC 6193 VF 41 * 16 41 55.6823919072 -48 47 07.729613844   12.79 12.38     ~ 8 0
41 CD-48 11088 SB* 16 42 00.4657872192 -48 42 32.493492324   10.34 9.99     B7 19 0
42 CPD-48 8725 * 16 42 00.5781931488 -48 45 25.093455588   11.85 11.53     A0 3 0
43 CD-48 11090 * 16 42 05.6899749096 -48 42 56.763214236   10.94 10.55     B8 18 0
44 HD 150401 * 16 43 05.7619434864 -48 11 39.928801092 9.43 9.75 9.25 9.67   B3II/III 17 0
45 HD 150500 * 16 43 44.3676787920 -47 06 20.541876372   7.02 7.07     ApSi 35 0
46 CD-47 10989 * 16 43 54.4187556096 -47 51 44.642120112   11.20 10.53     ~ 6 0
47 HD 328862 bC? 16 44 08.8986364200 -47 19 04.486886580 9.89 10.40 10.18 10.20   B3 29 0
48 HD 328847 * 16 46 00.6614970240 -47 01 19.561655676 9.81 9.89 9.63     B5 24 0
49 HD 328848 * 16 46 04.3762844376 -47 00 01.899217944   10.60 10.32     A 12 0
50 NGC 6204 6 * 16 46 07.6618808856 -47 00 07.338756492   12.33 11.87 11.84   ~ 4 0
51 CD-46 11006s EB* 16 46 08.8600589568 -47 01 45.300205416   11.09 10.82     B_ 12 0
52 NGC 6204 OpC 16 46 09.1 -47 01 29   8.51 8.2     ~ 139 0
53 CPD-46 8213 * 16 46 30.2421031488 -47 01 10.392834792 11.03 11.44 10.89     ~ 12 1
54 CD-46 11016p * 16 46 30.7049796168 -47 04 04.108183140   11.11 10.49 10.43   ~ 8 1
55 CPD-46 8217 * 16 46 31.5320417160 -46 58 57.852443820 10.76 11.49 11.35     ~ 8 1
56 HD 328856 * 16 46 33.3553009152 -47 04 50.959695432 8.32 9.95 9.48 9.19 8.485 O9.7II 48 1
57 CPD-46 8220 * 16 46 35.7041764416 -47 05 26.822831064 10.01 10.58 10.27     B0III 18 1
58 CD-46 11017 * 16 46 36.0142148208 -47 05 11.294995668 8.99 10.19 9.81 9.63   O9.7II-III 31 1
59 HD 150958 ** 16 46 38.8728467256 -47 05 24.623668536 7.01 7.64 7.30 8.22   O6.5Ia(n)f 86 1
60 NGC 6167 834 * ~ ~           ~ 1 0
61 NGC 6167 836 * ~ ~           ~ 1 0
62 NGC 6167 900 * ~ ~           ~ 1 0
63 NGC 6167 901 * ~ ~           ~ 1 0
64 NGC 6167 913 * ~ ~           ~ 1 0
65 NGC 6167 914 * ~ ~           ~ 1 0
66 NGC 6167 921 * ~ ~           ~ 1 0
67 NGC 6167 923 * ~ ~           ~ 1 0
68 NGC 6167 948 * ~ ~           ~ 1 0
69 NGC 6167 966 * ~ ~           ~ 1 0
70 NGC 6167 969 * ~ ~           ~ 1 0
71 NGC 6167 973 * ~ ~           ~ 1 0
72 NGC 6167 983 * ~ ~           ~ 1 0
73 NGC 6167 1004 * ~ ~           ~ 1 0
74 NGC 6167 1008 * ~ ~           ~ 1 0
75 NGC 6167 1052 * ~ ~           ~ 1 0
76 NGC 6167 1064 * ~ ~           ~ 1 0
77 NGC 6167 1065 * ~ ~           ~ 1 0
78 NGC 6167 1104 * ~ ~           ~ 1 0
79 NGC 6167 1119 * ~ ~           ~ 1 0
80 [HH77] 418 * ~ ~   16.13 14.08     ~ 2 0
81 Cl* NGC 6193 VF 44 * ~ ~   12.44 12.14     ~ 3 0
82 NGC 6167 1109 * ~ ~           ~ 1 0
83 NGC 6167 860 * ~ ~   12.64 11.86     ~ 2 0
84 NGC 6167 861 * ~ ~   12.58 11.74     ~ 2 0
85 NGC 6167 868 * ~ ~   13.16 12.35     ~ 2 0
86 NGC 6167 870 * ~ ~   13.01 12.22     ~ 2 0
87 NGC 6167 871 * ~ ~   13.72 12.94     ~ 2 0
88 NGC 6167 936 * ~ ~   12.38 11.56     ~ 2 0
89 NGC 6167 949 * ~ ~   12.39 11.65     ~ 2 0
90 NGC 6167 953 * ~ ~   12.46 11.83     ~ 2 0
91 NGC 6167 826 * ~ ~           B3III 2 0
92 NGC 6167 278 * ~ ~           B3III 2 0
93 NGC 6167 840 * ~ ~           B2III 2 0
94 Cl* NGC 6204 W 8 * ~ ~   12.61 11.48     ~ 3 0
95 Cl* NGC 6204 W 15 * ~ ~   11.86 11.30     ~ 4 0
96 Cl* NGC 6204 W 19 * ~ ~   10.71 9.68     ~ 4 0
97 Cl* NGC 6204 W 33 * ~ ~   12.68 12.24     ~ 3 0
98 Cl* NGC 6204 W 43 * ~ ~   12.18 11.91     ~ 3 0
99 Cl* NGC 6204 W 60 * ~ ~   12.05 11.63     ~ 3 0
100 Cl* NGC 6204 W 70 * ~ ~   11.47 11.11     ~ 3 0
101 Cl* NGC 6167 BS H8 * ~ ~           ~ 1 0
102 NGC 6167 218 * ~ ~           ~ 1 0
103 NGC 6167 271 * ~ ~           ~ 1 0

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