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Table 1

Parameters of 6.7 GHz methanol maser cloudlets with detected linear polarization.

Radiative transfer model
Feature V LSR F peak P χ pol χ vel ΔVi TbΔΩ θ
# (km s-1) (Jy beam-1) (%) (°) (°) (km s-1) (log K sr) (°)

Northern region – Dec (J2000) >−9:00:38.30
1 74.76 105.50 4.0 ± 0.1 −61 ± 2 +22 ± 14
2 75.55 34.52 1.1 ± 0.1 −14 ± 1 ...
3 74.32 44.47 2.2 ± 0.3 −22 ± 4 +108 ± 19
4 74.54 97.84 1.1 ± 0.1 +51 ± 1 +5 ± 7
5 74.81 45.39 0.9 ± 0.2 +81 ± 2 ...
7 75.86 38.56 1.1 ± 0.1 +76 ± 1 ...
11 72.70 30.90 2.2 ± 0.1 +36 ± 5 +140 ± 14
13 74.41 8.24 4.6 ± 0.8 +36 ± 2 ...
14 74.32 19.42 3.3 ± 0.3 +27 ± 1 ...
15 74.67 11.37 0.9 ± 0.3 0 ± 9 +96 ± 8
18 73.75 9.48 1.7 ± 0.3 +17 ± 5 +75 ± 7
19 73.49 10.69 1.4 ± 0.1 −17 ± 1 −160 ± 10
21 76.60 10.09 1.4 ± 0.3 −10 ± 3 +97 ± 6
24 73.93 4.03 1.5 ± 0.3 0 ± 12 ... <0.5
26 73.18 11.29 0.6 ± 0.2 −88 ± 6 −24 ± 10
31 73.27 4.32 3.8 ± 0.4 +33 ± 2 +147 ± 38
65 78.71 0.82 9.2 ± 0.4 −58 ± 2 +11 ± 31 <0.5
82a 74.85 6.16 1.2 ± 0.2 +3 ± 9 ...
Southern region – Dec (J2000) <−9:00:38.30
6 80.73 64.62 0.7 ± 0.1 +56 ± 7 −16 ± 7
12 81.26 8.45 0.4 ± 0.1 −12 ± 3 −131 ± 14
16 79.50 17.14 2.1 ± 0.3 −22 ± 8 −31 ± 12
27 79.37 4.45 1.8 ± 0.2 +89 ± 3 +151 ± 12 <0.5
38 82.84 1.90 2.3 ± 0.2 −44 ± 3 −77 ± 13 <0.5
55 70.28 0.61 6.2 ± 0.8 −7 ± 3 −155 ± 21 <0.5
58 82.49 1.77 3.5 ± 0.7 −49 ± 2 ... <0.5

Notes. Column 1: cloudlets’ labels (same labels as for corresponding cloudlets identified in Table 4 of Sanna et al. 2010b). Columns 2 and 3: LSR velocity and brightness of the brightest spot of each cloudlet on 2011 May 29, respectively. Columns 4 and 5: measured linear polarization fraction and position angle (east of north) of the linear polarization vectors for each cloudlet, respectively. Column 6: position angle of the velocity vectors as measured from Sanna et al. (2010b), for comparison with Col. 5. Columns 7–9: model results for the emerging brightness temperature, the intrinsic thermal linewidth, and the angle between the magnetic field and the maser propagation direction for each cloudlet, respectively.

(a)

New feature, see Fig. 2.

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