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Table B.1

Line parameters for HCO.

Source Frequency rms T mb Δv Integrated intensity Error on int. intensity
MHz mK mK km s-1 K km s-1 K km s-1
L1689B 86 670.76 2.6 545 0.50 0.290 0.029
86 708.36 2.4 360 0.51 0.196 0.020
86 777.46 2.2 360 0.50 0.192 0.019
86 805.78 2.1 145 0.48 0.073 0.008
L1709A 86 670.76 3.7 265 0.50 0.141 0.014
86 708.36 2.8 170 0.55 0.100 0.010
86 777.46 3.1 165 0.51 0.089 0.009
86 805.78 3.3 55 0.52 0.031 0.004
L429 86 670.76 4.6 140 0.50 0.075 0.008
86 708.36 4.1 100 0.65 0.069 0.007
86 777.46 4.8 95 0.51 0.050 0.006
86 805.78 4.9 35 0.46 0.018 0.003
L1495A-S 86 670.76 4.5 350 0.37 0.155 0.016
86 708.36 5.5 230 0.47 0.123 0.013
86 777.46 4.7 235 0.40 0.110 0.011
86 805.78 4.6 95 0.37 0.041 0.004
TMC2 86 670.76 5.6 155 0.38 0.063 0.007
86 708.36 5.6 100 0.55 0.057 0.006
86 777.46 5.1 90 0.37 0.035 0.004
86 805.78 5.3 35 0.35 0.013 0.002
L1521E 86 670.76 3.7 120 0.46 0.059 0.006
86 708.36 3.4 285 0.50 0.151 0.015
86 777.46 3.1 75 0.50 0.039 0.004
86 805.78 2.9 20 0.41 0.009 0.002
L1512 86 670.76 4.7 70 0.36 0.026 0.003
86 708.36 4.4 40 0.48 0.020 0.003
86 777.46 4.1 50 0.31 0.016 0.002
86 805.78 4.6 − − < 0.003 −
L1517B 86 670.76 4.2 55 0.41 0.024 0.003
86 708.36 4.6 25 0.38 0.011 0.002
86 777.46 4.0 30 0.35 0.012 0.002
86 805.78 4.8 − − < 0.004 −

Notes. The line intensity Tmb, the linewidth Δv, and the integrated intensity were determined from Gaussian fits to the line. The error is the quadratic sum of the statistical fit error and a calibration error taken as 10% at 3 mm. The HCO line at 86 708.36 MHz in L1521E is blended with the J:15−14 C3S line at 86 708.38 MHz, which explains that for this source, the relative intensities of the HCO lines deviate strongly from the statistical 5:3:3:1 ratios expected in the optically thin case. The 86 708.36 MHz line was therefore excluded from the fit in L1521E.

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