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Table 3

Averaged rms value in 0.27 km s-1 bin and mean (dash) values of the FWHMb and FWZI for the three water lines and the 12CO J = 10–9 spectra for each sub-type of YSO.

H2O 202–111 211–202 312–303 12CO J = 10–9 12CO/H2O
FWHM b FWZI
(km s-1) (mK) (km s-1) (mK) (km s-1) (mK) (km s-1) (km s-1) (mK) (km s-1)

LM0 30 ± 12 23 86 ± 45 20 87 ± 47 17 86 ± 31 20 ± 9 112 36 ± 14 0.7 ± 0.3 0.5 ± 0.2
LMI 18 ± 5 22 34 ± 13 17 33 ± 15 9 42a 11 ± 1 115 24 ± 8 0.6 ± 0.1 0.8 ± 0.4
IM 29 ± 5 24 69 ± 19 22 63 ± 30 19 79a 20 ± 4 105 63 ± 21 0.7 ± 0.2 0.9 ± 0.1
HM 27 ± 10 78 47 ± 10 68 70 ± 32 45 71 ± 35 22a 180 81 ± 30b 0.9a 1.9 ± 0.2b

Notes. The averaged FWHMb and FWZI ratios calculated from the 12CO and H2O observations are also indicated in the last two columns. LM0: low-mass Class 0 protostars; LMI: low-mass Class I sources; IM: intermediate-mass YSOs; HM: high-mass objects. See specification in the FWZI calculation for the low-mass objects in Mottram et al. 2014.

(a)

No standard deviation is given because the number of observed or detected sources is less than four.

(b)

For the high-mass YSOs, the 12CO J = 3–2 spectra were included in the calculation of the mean value of the FWZI parameter.

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