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Table A.2

Parameters of the 6.7-GHz CH3OH maser features detected in G30.76-0.05.

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)
Maser RAa Deca Peak flux Vlsr ΔvL χb TbΔΩc PV ΔVZ |B||| θd
offset offset Density(I)
(mas) (mas) (Jy/beam) (km/s) (km/s) (%) (°) (km/s) (log K sr) (%) (m/s) (mG) (°)
G308.E01 -168.187 -21.082 0.215 ± 0.005 89.28 0.50
G308.E02 -163.384 -23.605 0.274 ± 0.012 88.22 0.29
G308.E03 -81.835 116.776 0.113 ± 0.004 92.61 0.27
G308.E04 -72.856 103.867 0.159 ± 0.006 89.54 0.44
G308.E05 -41.918 -19.604 0.578 ± 0.007 89.89 0.45
G308.E06 -31.682 -239.437 0.239 ± 0.029 91.08 0.99
G308.E07 -30.824 61.823 0.436 ± 0.048 91.21 0.33
G308.E08 -30.709 -0.284 13.831 ± 0.067 91.38 0.41 0.4 ± 0.1 − 81 ± 19
G308.E09 -29.165 62.798 0.222 ± 0.018 90.90 0.57
G308.E10 -27.850 111.902 0.287 ± 0.019 90.94 0.15
G308.E11 -19.386 10.185 0.077 ± 0.008 91.78 1.87
G308.E12 -17.213 -3.788 0.183 ± 0.006 90.24 0.33
G308.E13 -16.813 2.300 0.076 ± 0.008 90.59 2.74
G308.E14 -14.526 -66.776 0.081 ± 0.006 90.46 0.97
G308.E15 -11.437 -16.159 1.070 ± 0.029 91.12 0.41
G308.E16 -10.694 19.527 0.829 ± 0.006 93.71 0.24
G308.E17 -2.173 -175.463 0.093 ± 0.018 92.17 0.87
G308.E18 -1.601 13.784 1.531 ± 0.009 93.32 0.34
G308.E19 -0.515 64.768 0.303 ± 0.040 91.82 0.48
G308.E20 0 0 14.074 ± 0.085 91.82 0.38 1.9 ± 0.4 8 ± 3
G308.E21 5.947 18.745 0.088 ± 0.005 92.53 0.27
G308.E22 11.495 -400.833 0.519 ± 0.074 91.87 0.38
G308.E23 31.396 -26.608 0.166 ± 0.023 92.13 0.19
G308.E24 45.807 -77.103 0.098 ± 0.007 93.93 0.23

Notes. (a)The reference position is α2000 = 18h47m39s.732 and δ2000 = −01°57′21″.975 (see Sec. 3). (b)Pl and χ are the mean values of the linear polarization fraction and the linear polarization angle measured across the spectrum, respectively. (c)The best-fitting results obtained using a model based on the radiative transfer theory of methanol masers for Γ + Γν = 1 s-1 (Vlemmings et al. 2010; Surcis et al. 2011b). The errors were determined by analyzing the full PDFprobability distribution function. (d)The angle between the magnetic field and the maser propagation direction is determined using the observed Pl and the fitted emerging brightness temperature. The errors were determined by analyzing the full PDF. The boldface indicates that |θ+ − 55°| < |θ− 55°|, i.e., the magnetic field is parallel to the linear polarization vector (see Sect. 4).

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