2016MNRAS.463.2653D


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.05CET13:21:14

2016MNRAS.463.2653D - Mon. Not. R. Astron. Soc., 463, 2653-2666 (2016/December-2)

Extinction law in the range 0.4-4.8 µm and the 8620 Å DIB towards the stellar cluster Westerlund 1.

DAMINELI A., ALMEIDA L.A., BLUM R.D., DAMINELI D.S.C., NAVARETE F., RUBINHO M.S. and TEODORO M.

Abstract (from CDS):

The young stellar cluster Westerlund 1 (Wd 1: l = 339 .6, b = -0 .4) is one of the most massive in the local Universe, but accurate parameters are pending on better determination of its extinction and distance. Based on our photometry and data collected from other sources, we have derived a reddening law for the cluster line-of-sight representative of the Galactic plane (-5° < b <+5°) in the window 0.4-4.8 µm: The power-law exponent α = 2.13 ± 0.08 is much steeper than those published a decade ago (1.6-1.8) and our index RV = 2.50 ± 0.04 also differs from them, but in very good agreement with recent works based on deep surveys in the inner Galaxy. As a consequence, the total extinction AKs = 0.74 ± 0.08 (AV = 11.40 ± 2.40) is substantially smaller than previous results (0.91-1.13), part of which (AKs = 0.63 or AV = 9.66) is from the interstellar medium. The extinction in front of the cluster spans a range of ΔAV ∼8.7 with a gradient increasing from SW to NE across the cluster face, following the same general trend of warm dust distribution. The map of the J - Ks colour index also shows a trend of reddening in this direction. We measured the equivalent width of the diffuse interstellar band at 8620 Å (the 'GAIA DIB') for Wd 1 cluster members and derived the relation AKs = 0.612 EW - 0.191 EW2. This extends the Munari et al. relation, valid for EB–V < 1, to the non-linear regime (AV > 4).

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): dust, extinction - ISM: lines and bands - open clusters and associations: individual: Westerlund 1 - open clusters and associations: individual: Westerlund 1

VizieR on-line data: <Available at CDS (J/MNRAS/463/2653): table2.dat>

Simbad objects: 126

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Number of rows : 126

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME NGC 869/884 OpC 02 20.5 +57 08           ~ 51 0
2 BD+45 973 * 04 43 01.9719044625 +45 37 49.452406490 8.75 9.04 8.63     B3V 19 0
3 HD 90177 s*b 10 22 53.8426931454 -59 37 28.361118869 9.16 9.66 8 8.15   LBV 307 0
4 Cl Trumpler 14 OpC 10 43 56 -59 33.0   5.70 5.5     ~ 436 0
5 HD 94878 bL* 10 55 58.9150038252 -60 23 33.434805592 8.67 9.37 8.70 8.07   B0/2eq 141 0
6 V* AG Car WR* 10 56 11.5779283438 -60 27 12.809532379 7.00 7.57 6.96 7.73   WN11h 597 0
7 MR 35 s*b 11 08 40.0633818066 -60 42 51.718989987   12.33 10.20 11.66   LBV 117 0
8 NGC 3603 OpC 11 15 18.6 -61 15 26           ~ 965 1
9 [MCM2005b] 81 OpC 16 40 29.60 -46 23 25.6           ~ 19 0
10 Cl* Westerlund 1 W 3002 * 16 46 54.2 -45 51 54   23.6 18.93 16.08 13.26 B0Iab 5 0
11 WR 77a WR* 16 46 55.4 -45 51 34     20.3     WN 6 0
12 HD 151018 * 16 46 56.1174839681 -45 53 14.316404052 8.9 9.93 9.37 9.35   O9Ib 60 0
13 Cl* Westerlund 1 W 86 * 16 46 57.1592223945 -45 50 09.942344569   22.9 18.76 16.43 14.00 O9.5Ib 6 0
14 [B2007] J164657.71-455320.0 V* 16 46 57.7256759569 -45 53 20.034351977       14.741 12.318 B0Iab 7 0
15 Cl* Westerlund 1 W 228b * 16 46 58.0542750049 -45 53 00.930705088           O9Ib 6 0
16 Cl* Westerlund 1 W 55 * 16 46 58.4202565824 -45 51 31.291602492   21.6 18.030 15.283 12.758 O9.5B0.5Ia 12 0
17 [B2007] J164658.78-455431.9 V* 16 46 58.7769150922 -45 54 31.944699346     20.313 17.377 14.816 ~ 2 0
18 Cl* Westerlund 1 W 56b * 16 46 58.8 -45 51 45   22.8 18.88 16.36 13.76 O9.5Ib 7 0
19 Cl* Westerlund 1 W 84 * 16 46 59.03 -45 50 28.2   21.3 17.82 15.60 13.63 O9.5Ib 7 0
20 Cl* Westerlund 1 W 2 * 16 46 59.72 -45 50 51.3   20.4 16.978 14.287 11.771 O9.5B0.5Ia 13 0
21 WR 77c WR* 16 47 00.8819171237 -45 51 20.512015820     19 17.336 14.340 WN8o 11 0
22 Cl* Westerlund 1 W 21 V* 16 47 01.13 -45 51 13.4   22.5 18.41 15.619 12.861 B0.5Ia 8 0
23 Cl* Westerlund 1 W 50b * 16 47 01.1720907616 -45 50 26.809089235   22.8 19.66 17.21 14.69 O9III 5 0
24 Cl* Westerlund 1 W 57a * 16 47 01.3597701479 -45 51 45.799486574   20.7 16.877 13.83 11.13 B4Ia 11 0
25 Cl* Westerlund 1 BKS H * 16 47 01.4273629136 -45 50 37.260634424   18.781 14.47     F3Ia+ 24 0
26 Cl* Westerlund 1 W 232 s*b 16 47 01.4381680892 -45 52 35.095830848   21.3 17.53 14.98 12.45 B0Iab 5 0
27 WR 77d WR* 16 47 01.5 -45 51 45           WN 8 0
28 Cl* Westerlund 1 W 78 V* 16 47 01.5495728784 -45 49 57.921299756     17.413 14.621 12.04 B1Ia 8 0
29 WR 77e WR* 16 47 01.668 -45 51 20.40     19     WN 10 0
30 [B2007] J164701.69-455257.8 V* 16 47 01.6818173410 -45 52 58.068922232       15.393 12.966 O9.5Ib 6 0
31 Cl* Westerlund 1 W 52 * 16 47 01.8447542252 -45 51 29.440031536   21.8 17.876 14.745 12.065 B1.5Ia 8 0
32 Cl* Westerlund 1 W 49 * 16 47 01.9032261354 -45 50 31.657908629   22.6 18.76 16.392 13.638 B0Iab 9 0
33 Cl* Westerlund 1 W 24 * 16 47 02.1549780316 -45 51 12.574291870   23.0 18.71 15.96 13.24 O9.2Ia 14 0
34 Cl* Westerlund 1 W 12 * 16 47 02.23 -45 50 59.1   22.0 17.575 13.611   F1Ia+ 21 0
35 Cl* Westerlund 1 W 11 * 16 47 02.2393028215 -45 50 47.194497409   21.2 17.508 14.599 11.898 O9.5B0.5Ia 13 0
36 Cl* Westerlund 1 W 61a * 16 47 02.2999490685 -45 51 41.769006403   21.2 17.506 14.633 12.01 O9.5B0.5Ia 12 0
37 Cl* Westerlund 1 W 62a * 16 47 02.5 -45 51 37           O9.2Iab 7 0
38 Cl* Westerlund 1 W 23 * 16 47 02.56 -45 51 08.8   22.1 18.316 14.986 12.081 O9.5B0.5Ia 13 0
39 Cl* Westerlund 1 W 61b * 16 47 02.5661124892 -45 51 41.865044969   22.7 18.59 16.00 13.31 O9.5Iab 13 0
40 Cl* Westerlund 1 W 41 * 16 47 02.70 -45 50 56.9   21.3 17.87 15.39 12.78 O9.2Ia 12 0
41 Cl* Westerlund 1 W 38 * 16 47 02.8 -45 50 46   23.2 19.10 16.47 13.81 O9Iab 7 0
42 Cl* Westerlund 1 W 6b * 16 47 02.93 -45 50 22.3   23.6 20.20 17.91 15.25 O9.5III 5 0
43 WR 77f WR* 16 47 02.96 -45 50 19.7   21.552 17.792 15.035 12.508 WN10-11h 25 0
44 Cl* Westerlund 1 W 54 * 16 47 03.06 -45 51 30.5           B0.5Iab 5 0
45 Cl* Westerlund 1 BKS B * 16 47 03.1074828977 -45 52 18.957165027   22.8 19.008 13.634   M3Ia 21 0
46 WR 77g WR* 16 47 03.15 -45 50 43.8     19     WN 11 0
47 Cl* Westerlund 1 W 42 * 16 47 03.25 -45 50 52.2         10.764 B9Ia+ 16 0
48 Cl* Westerlund 1 W 10 s*b 16 47 03.3403089792 -45 50 34.601286210   22.720 18.516 15.257   O9.5/B0.5Iae 14 0
49 Cl* Westerlund 1 W 63a * 16 47 03.39 -45 51 57.7   22.6 18.56 16.20 13.68 B0Iab 5 0
50 Cl* Westerlund 1 W 43b * 16 47 03.52 -45 50 56.5           B1Ia 5 0
51 Cl* Westerlund 1 W 43 * 16 47 03.56 -45 50 57.6   22.8 18.05 15.378 12.647 O9.5B0.5Ia 14 0
52 Cl* Westerlund 1 W 46b * 16 47 03.61 -45 51 20.0           O9.5Ib 5 0
53 Hen 3-1250 Em* 16 47 03.6265799796 -45 50 14.357624931   20.0 15.972     B5Ia+ 23 0
54 Cl* Westerlund 1 BKS F s*y 16 47 03.6836562279 -45 50 43.530430986     15.05     F5Ia+ 19 0
55 Cl* Westerlund 1 W 43c * 16 47 03.76 -45 50 58.3   20.4 18.35 16.18 13.66 O9Ib 6 0
56 Cl* Westerlund 1 W 65 * 16 47 03.8 -45 51 46   22.9 18.73 16.27 13.68 O9Ib 7 0
57 Cl* Westerlund 1 CN V WR* 16 47 03.8075338672 -45 50 38.730155095           WN8o 7 0
58 Cl* Westerlund 1 W 46a s*b 16 47 03.93 -45 51 19.6   23.0 18.55 15.537 12.499 B1Ia 12 0
59 Cl Westerlund 1 OpC 16 47 04.00 -45 51 04.9           ~ 482 0
60 Cl* Westerlund 1 W 6a * 16 47 04.00 -45 50 21.0   22.2 18.41 15.80 13.16 B0.5Iab 7 0
61 Cl* Westerlund 1 CN G WR* 16 47 04.03 -45 51 25.1   22.7 20.87 17.75 14.68 WN7o 15 0
62 Cl* Westerlund 1 W 30 ** 16 47 04.11 -45 50 39.0   22.4 18.45 15.80 13.20 O+O 17 0
63 Cl* Westerlund 1 W 33 * 16 47 04.1266525740 -45 50 48.475675980   20.090 15.61 12.803   B5Ia+ 20 0
64 Cl* Westerlund 1 W 60 * 16 47 04.1334135473 -45 51 52.256261673   22.8 18.50 16.041 13.384 O9.5B0.5Ia 14 0
65 Cl* Westerlund 1 W 9 WR* 16 47 04.1422943113 -45 50 31.307461802   21.8 17.47 14.47 11.74 Be 46 0
66 Cl* Westerlund 1 W 35 * 16 47 04.2013795259 -45 50 53.715343785   22.7 18.59 16.00 13.31 O9.5B0.5Ia 10 0
67 WR 77k WR* 16 47 04.2024907825 -45 51 07.245158203   22.6 18.86 15.61 12.52 WN7 22 0
68 Cl* Westerlund 1 W 34 * 16 47 04.39 -45 50 47.2   22.1 18.15 15.40 12.69 ~ 6 0
69 Cl* Westerlund 1 W 29 s*b 16 47 04.41 -45 50 39.8   22.6 18.66 16.02 13.38 O9.5/B0.5Ia 10 0
70 Cl* Westerlund 1 W 238 * 16 47 04.4262088378 -45 52 27.766019210   21.4 17.820 14.98 12.45 O9.5B0.5Ia 13 0
71 Cl* Westerlund 1 W 28 s*b 16 47 04.63 -45 50 38.4   20.9 17.146 14.303   B2Ia 12 0
72 Cl* Westerlund 1 W 20 s*r 16 47 04.6954939457 -45 51 23.957603850       15.660   M6I 18 0
73 Cl* Westerlund 1 W 8 * 16 47 04.81 -45 50 25.2   19.9 15.913     F8Ia+ 15 0
74 Cl* Westerlund 1 W 19 * 16 47 04.8656136905 -45 50 59.294757475   22.6 18.784 15.366 12.452 O9.5B0.5Ia 13 0
75 Cl* Westerlund 1 W 8b * 16 47 04.95 -45 50 26.7           B1.5Ia 7 0
76 Cl* Westerlund 1 W 36 * 16 47 05.0818815492 -45 50 55.159484121   22.8 18.89 16.09 13.38 ~ 8 0
77 Cl* Westerlund 1 W 27 * 16 47 05.1556032855 -45 50 41.414756475   21.5 17.94 15.35 12.80 O9I+OI 7 0
78 WR 77o WR* 16 47 05.37 -45 51 04.7     20.99 17.50 14.37 WN7o 21 0
79 Cl* Westerlund 1 BKS AS * 16 47 05.4063692757 -45 50 36.608299661   22.1 16.79     M5-6Ia 29 0
80 2MASS J16470570-4550506 V* 16 47 05.71 -45 50 50.7   21.2 17.610 14.898 12.228 B0.5Ia 7 0
81 Cl* Westerlund 1 W 25 * 16 47 05.7848583644 -45 50 33.418949115   21.9 17.85 15.22 12.61 O9Iab 9 0
82 Cl* Westerlund 1 W 39a * 16 47.1 -45 51           ~ 3 0
83 Cl* Westerlund 1 W 37 * 16 47 06.01 -45 50 47.4   22.8 19.11 16.40 13.65 O9Ib 5 0
84 WR 77q WR* 16 47 06.01 -45 50 23.4       17.652 15.223 WN5o 12 0
85 WR 77p WR* 16 47 06.0558179916 -45 52 08.310667517     18.379 15.675 12.940 WC9 18 0
86 Cl* Westerlund 1 W 17 * 16 47 06.2491553642 -45 50 49.290357352   22.7 18.87 16.19 13.56 O9Iab 13 0
87 Cl* Westerlund 1 W 265 * 16 47 06.2786920752 -45 49 23.781230202   22.0 17.739   10.54 F1-5Ia+ 20 0
88 WR 77r WR* 16 47 06.28 -45 51 26.4     19 18.935 15.600 WN7o 15 0
89 Cl* Westerlund 1 W 13 EB* 16 47 06.4536718776 -45 50 26.067083031   21.1 17.19 14.63 12.06 BIa+ 28 0
90 [CMN2008] J164706.5-455039 WR* 16 47 06.60 -45 50 38.6   23.7 19.81 16.98 13.99 WN6o 6 0
91 Cl* Westerlund 1 W 16 * 16 47 06.6152064188 -45 50 42.171179650   20.5 16.248     A5Ia+ 23 0
92 Cl* Westerlund 1 W 15 * 16 47 06.6298019596 -45 50 29.720379477   22.8 18.96 16.38 13.75 O9.2Ia 21 0
93 Cl* Westerlund 1 W 74 * 16 47 07.0789459358 -45 50 13.090797987       15.835 13.312 O9.2Ia 10 0
94 Cl* Westerlund 1 W 243 s*b 16 47 07.5028508821 -45 52 29.152464693   19.873 15.730     LBV 53 0
95 WR 77sa WR* 16 47 07.6210887572 -45 49 22.083635800           WN6h 7 0
96 WR 77sb WR* 16 47 07.6628412189 -45 52 35.973599868       16.886 14.047 WN6o 11 0
97 WR 77s WR* 16 47 08.3531944202 -45 50 45.405753222     19.69 16.59 13.68 WN7b 23 0
98 Cl* Westerlund 1 W 71 * 16 47 08.4569033058 -45 50 49.327340354   21.5 17.531 14.158 11.16 B2.5Ia 17 0
99 Cl* Westerlund 1 BKS E * 16 47 08.9189383747 -45 49 58.452680562     16.70     M4Ia 18 0
100 Cl* Westerlund 1 W 70 * 16 47 09.3840936441 -45 50 49.680751506   21.2 16.88   11.352 B3Ia 13 0
101 Cl* Westerlund 1 W 3003 V* 16 47 11.6071818028 -45 49 22.481518691       16.211 13.314 B0Ib 5 0
102 [B2007] J164713.39-454910.5 V* 16 47 13.3836504044 -45 49 10.640529609       15.960 12.990 B0Iab 5 0
103 WR 77sd WR* 16 47 14.14 -45 48 32.1           WN5o 5 0
104 HD 151804 s*b 16 51 33.7215112148 -41 13 49.928887100 4.45 5.29 5.22     O8Iaf 356 0
105 HD 153159 * 17 00 02.7947508352 -47 04 00.931472700 10.38 10.33 9.58 9.29   B5Ib 14 0
106 Cl VDBH 222 OpC 17 18 45 -38 17.7           ~ 20 0
107 HD 160529 sg* 17 41 59.0257256544 -33 30 13.702939546 8.17 7.87 6.66 5.50 4.51 A2Ia 187 1
108 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11850 0
109 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 643 0
110 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 456 0
111 HD 168607 s*b 18 21 14.8855350307 -16 22 31.760520819 10.23 9.82 8.28 8.55   B9Iaep 175 1
112 HD 168625 s*b 18 21 19.5486475779 -16 22 26.077308888 10.15 9.78 8.37 8.76   B6Iap 253 2
113 HD 169054 * 18 24 59.6667407784 -44 41 24.774648474   10.24 9.68     G5/K0+A/F 3 0
114 RSGC 1 OpC 18 37 58 -06 53.0           ~ 91 0
115 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 86 0
116 RSGC 3 OpC 18 45 20.0 -03 24 43           ~ 49 0
117 BD+40 4220 EB* 20 32 22.4241357648 +41 18 18.942382590 11.32 10.79 9.185     O6.5-7f+O5.5-6f 372 0
118 Schulte 12 s*b 20 32 40.9574572449 +41 14 29.276333992 16.1 14.45 11.702     B3-4Ia+ 363 0
119 Schulte 9 s*b 20 33 10.7366753544 +41 15 08.222187463 13.38 12.77 10.96     O4.5If 209 0
120 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 811 0
121 Schulte 7 * 20 33 14.1095790591 +41 20 21.903381641 12.24 12.00 10.55     O3If* 131 0
122 BD+40 4227A SB* 20 33 15.0780900764 +41 18 50.478859468 10.42 10.27 8.98 8.03 6.83 O6Ib(fc)+O4.5:III:(fc) 219 0
123 BD+41 3807 SB* 20 34 08.5147839926 +41 36 59.407506888 11.74 11.52 10.03     O5.5Ifc 114 0
124 * pi. Aqr Be* 22 25 16.6228499 +01 22 38.634579 3.64 4.60 4.64 4.48 4.48 B1III-IVe 389 0
125 NAME Local Group GrG ~ ~           ~ 7117 0
126 NAME Galactic Bulge reg ~ ~           ~ 3493 0

    Equat.    Gal    SGal    Ecl

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2020.12.05-13:21:14

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