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Table 2.

ALMA 3-mm flux densities of the known stars detected in these observations.

Source RA Dec Flux density (mJy)
α
Sp. Type Comments
J2000 J2000 3 mm 3.6 cm Radio 3 mm–3.6 cm
WR stars and hybrids
WR J 47 2.472 50 59.976 0.18 ± 0.04 > 0.03 WN5h No RV data, Not obvious Binary (NoB)
WR R 47 6.090 50 22.535 0.35 ± 0.07 > 0.30 WN5o No RV data, X-ray suggests binary
WR O 47 7.651 52 36.182 0.48 ± 0.06 > 0.42 WN6o X-ray suggests binary
WR U 47 6.538 50 39.184 0.40 ± 0.05 > 0.35 WN6o X-ray suggests binary
WR Q 46 55.528 51 34.608 0.40 ± 0.06 > 0.35 WN6o No RV data, NoB
WR A 47 8.347 50 45.571 3.98 ± 0.21 0.50 ± 0.06 0.00 ± 0.04 0.85 WN7b+OB? 7.63d binary
WR D 47 6.245 51 26.525 0.76 ± 0.07 > 0.61 WN7o X-ray suggests CWB
WR B 47 5.367 51 5.016 1.82 ± 0.12b > − 0.35b WN7o+OB? 3.52d binary
3.40 ± 0.17a 4.30 ± 0.04a +0.04 ± 0.07a −0.10 ± 0.02a
WR G 47 4.005 51 25.176 0.83 ± 0.07 > 0.65 WN7o X-ray suggests CWB
WR P 47 1.584 51 45.425 0.68 ± 0.06 > 0.57 WN7o No RV data, NoB
WR I 47 0.878 51 20.674 2.16 ± 0.12 >1.04 WN8o No RV data, NoB
WR V 47 3.799 50 38.916 1.25 ± 0.08 0.40 ± 0.06 0.00 ± 0.50 0.46 ± 0.07 WN8o No RV data, NoB
WR L 47 4.195 51 7.356 3.65 ± 0.19 0.40 ± 0.06 > 0.5 0.90 ± 0.07 WN9h+OB? RV binary
WR S 47 2.972 50 19.836 0.51 ± 0.06 0.30 ± 0.06 > 0.0 0.22 ± 0.10 WN10-11h/BHG Runaway, single
W13 47 6.451 50 26.224 0.37 ± 0.05 > 0.32 WNVL/BHG Eclipsing binary
WR K 47 3.230 50 43.956 0.32 ± 0.06 > 0.25 WC8 NoB
WR E 47 6.048 52 8.465 0.91 ± 0.07 > 0.69 WC9 RV variable 10–20 km s−1
WR F 47 5.203 52 25.116 1.44 ± 0.09 0.30 ± 0.06 +0.66 ± 0.09 0.64 ± 0.09 WC9d+OB? 5.05d Binary
WR C 47 4.402 51 3.756 0.39 ± 0.05 > 0.34 WC9d Dust production suggests binary
WR H 47 4.204 51 19.956 0.49 ± 0.06 > 0.43 WC9d Dust suggests binary
WR M 47 3.954 51 37.776 0.55 ± 0.06 > 0.48 WC9d RV shift suggests binary
Yellow hypergiants and red supergiants
W16a 47 6.607 50 42.334 0.69 ± 0.07b > − 0.34b A5Ia+
1.46 ± 0.15a 1.60 ± 0.30a −0.33 ± 0.09a −0.04 ± 0.09a
W12a 47 2.205 50 59.166 1.00 ± 0.10b > − 0.44b F1Ia+
1.63 ± 0.14a 2.90 ± 0.30a −0.06 ± 0.08a −0.23 ± 0.06a
W4 47 1.422 50 37.385 1.66 ± 0.11b 0.78 ± 0.07b 0.49 ± 0.31b 0.30 ± 0.05b F3Ia+
2.03 ± 0.25c 0.80 ± 0.08c −0.23 ± 0.07c 0.00 ± 0.07c
W32 47 3.678 50 43.686 0.38 ± 0.07 0.40 ± 0.06 0.00 ± 0.05 −0.03 ± 0.10 F5Ia+
W237 47 3.101 52 19.086 1.80 ± 0.20b −0.06 ± 0.10b M3Ia
1.60 ± 0.14a 7.40 ± 2.21a −0.35 ± 0.19a −0.05 ± 0.14a
W75 47 8.914 49 58.589 0.45 ± 0.07 0.30 ± 0.06 > 0.0 0.16 ± 0.11 M4Ia
W20 47 4.686 51 24.096 1.45 ± 0.11b > 0.00b M5Ia
3.66 ± 0.19a 3.80 ± 0.40a −0.11 ± 0.07a −0.02 ± 0.05a
W26 47 5.375 50 36.486 114.75 ± 5.76 20.10 ± 2.00 0.07 ± 0.11 0.71 ± 0.05 M5-6Ia
Blue hypergiants, LBVs, OB supergiants and the sgB[e] star
W25 47 5.831 50 33.785 0.18 ± 0.01 > 0.01 O9Iab Faint X-ray, no RV data
W17 47 6.167 50 49.355 0.75 ± 0.04 1.70 ± 0.20 −0.42 ± 0.11 −0.33 ± 0.06 09.5Ia Faint X-ray, no RV data
W43a 47 3.549 50 57.816 0.17 ± 0.05 > 0.01 B0Ia 16.27d binary from RV shifts
W61a 47 2.300 51 41.826 0.10 ± 0.05 > − 0.22 B0.5Ia No RV data, NoB, 4.5σ
W46a 47 3.911 51 19.866 0.35 ± 0.06 > 0.30 B1Ia No RV data, NoB
W56a 46 58.939 51 49.110 0.11 ± 0.05 > − 0.18 B1.5Ia No RV data, NoB
W52 47 1.843 51 29.495 0.11 ± 0.05 > − 0.16 B1.5Ia 6.7d ellipsoidal modulation
W8b 47 4.953 50 26.856 0.15 ± 0.05 > − 0.06 B1.5Ia No RV data, NoB
W243 47 7.496 52 29.252 9.96 ± 0.50 1.50 ± 0.20 0.87 ± 0.30 0.77 ± 0.13 B2Ia (LBV) RV pulsator, NoB
W28 47 4.660 50 38.646 0.20 ± 0.05 > 0.07 B2Ia No RV data, NoB
W2a 46 59.707 50 51.332 0.12 ± 0.05 > − 0.16 B2Ia RV pulsator, NoB, 4.5σ
W11 47 2.231 50 47.286 0.11 ± 0.05 > − 0.19 B2Ia No RV data or X-ray detection, 4.5σ
W23a 47 2.567 51 9.066 0.23 ± 0.05 > 0.12 B2Ia+OB RV data, NoB
W71 47 8.450 50 49.530 0.27 ± 0.07 > 0.19 B2.5Ia RV pulsator, NoB
W33 47 4.117 50 48.636 0.23 ± 0.05 > 0.13 B5Ia+ No RV data, NoB
W7 47 3.618 50 14.526 0.37 ± 0.05 > 0.31 B5Ia+ RV pulsator, NoB
W42a 47 3.239 50 52.326 0.25 ± 0.06 > 0.16 B9Ia+ No RV data, NoB
W9 47 4.140 50 31.430 152.92 ± 0.08b 24.90 ± 2.50b 0.68 ± 0.70b 0.74 ± 0.04b SgB[e] X-ray suggests CWB
16.15 ± 0.90c 30.50 ± 3.00c 0.16 ± 0.17c −0.26 ± 0.05c
D09-R1 47 9.071 51 10.139 1.05 ± 0.12 0.70 ± 0.07b −0.23 ± 0.27b 0.17 ± 0.09a BSG
6.5 ± 1.2c −0.61 ± 0.11c
D09-R2 47 6.908 50 37.204 0.68 ± 0.08 0.70 ± 0.06 −0.43 ± 0.11 −0.01 ± 0.06 BSG
W30 47 4.117 50 39.456 0.17 ± 0.06 > 0.00 O+O X-ray suggests CWB

Notes. 3.6 cm flux densities and spectral indices taken from Do10 are also listed. Radio to mm spectral indices have been calculated using the total flux density unless both core and resolved components are separated in both the radio and ALMA images. Where no flux density is reported for a source in D010, we find a limiting spectral index based on a 3.6 cm flux density limit of 170 μ Jy beam−1 (see Do10 for details). Spectral type identifications have been taken from Crowther et al. (2006a) for WR stars, Clark et al. (2010) for the YHGs and RSGs, Negueruela et al. (2010) for the OB stars and Do10 for the two D09 sources,

(a)

total flux density,

(b)

core component flux density,

(c)

resolved flux density (not including core component).

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