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Table 5

Comparison of systemic velocities, linewidths, and non-thermal velocity dispersions for selected pairs of transitions for Cha I and III.

Transitions N cores a v LSR,mean b FWHM mean c σ nth,mean d e f
(km s-1) (km s-1) (km s-1)
Chamaeleon I
N2H+ 1–0 14 4.72±0.36 0.36±0.11 0.14±0.05 0.75 0.75±0.28
C34S 2–1 14 4.74±0.33 0.47±0.16 0.19±0.07 – 1.04±0.38
N2H+ 1–0 12 4.68±0.35 0.38±0.11 0.15±0.05 0.85 0.80±0.26
C17O 2–1 12 4.63±0.30 0.46±0.12 0.19±0.05 – 0.99±0.29
N2H+ 1–0 19 4.65±0.34 0.37±0.13 0.14±0.06 0.77 0.77±0.31
C18O/C17Og 19 4.67±0.29 0.50±0.20 0.20±0.09 – 1.09±0.47
N2H+ 1–0 19 4.65±0.34 0.37±0.13 0.14±0.06 0.87 0.77±0.31
CH3OH 20–10 A+ 19 4.66±0.32 0.41±0.13 0.16±0.06 – 0.88±0.31
HC3N 10–9 17 4.89±0.40 0.30±0.14 0.12±0.06 0.63 0.64±0.32
C34S 2–1 17 4.83±0.35 0.46±0.15 0.19±0.07 – 1.01±0.35
HC3N 10–9 15 4.87±0.40 0.31±0.14 0.12±0.06 0.71 0.66±0.33
C17O 2–1 15 4.73±0.33 0.43±0.12 0.17±0.05 – 0.93±0.29
HC3N 10–9 18 4.87±0.39 0.31±0.15 0.13±0.07 0.68 0.68±0.35
C18O/C17Og 18 4.75±0.33 0.46±0.16 0.19±0.07 – 1.00±0.37
HC3N 10–9 18 4.87±0.39 0.32±0.15 0.13±0.07 0.75 0.68±0.35
CH3OH 20–10 A+ 18 4.78±0.36 0.41±0.11 0.16±0.05 – 0.88±0.26
HC3N 10–9 14 4.75±0.36 0.35±0.15 0.14±0.07 0.96 0.76±0.36
N2H+ 1–0 14 4.69±0.36 0.38±0.13 0.15±0.06 – 0.80±0.31
C17O 2–1 24 4.68±0.37 0.41±0.11 0.17±0.05 1.09 0.89±0.27
CH3OH 20–10 A+ 24 4.76±0.34 0.39±0.11 0.16±0.05 – 0.84±0.26
C34S 2–1 18 4.86±0.35 0.45±0.15 0.19±0.06 1.14 1.00±0.34
C17O 2–1 18 4.78±0.32 0.42±0.12 0.17±0.05 – 0.91±0.28
CH3OH 20–10 A+ 28 4.72±0.31 0.41±0.13 0.17±0.06 1.11 0.88±0.32
CH3OH 21–11 E 28 4.72±0.32 0.40±0.16 0.16±0.07 – 0.86±0.39
C18O/C17Og 41 4.67±0.33 0.45±0.17 0.18±0.07 1.18 0.98±0.40
CH3OH 20–10 A+ 41 4.70±0.32 0.41±0.18 0.17±0.08 – 0.89±0.42
C18O/C17Og 22 4.77±0.35 0.45±0.13 0.18±0.06 1.18 0.97±0.32
C34S 2–1 22 4.84±0.36 0.43±0.15 0.18±0.06 – 0.94±0.34
Chamaeleon III
HC3N 10–9 3 1.51±0.04 0.23±0.04 0.09±0.02 0.54±0.04 0.48±0.10
C18O 2–1 3 1.40±0.13 0.42±0.08 0.17±0.04 – 0.91±0.19
HC3N 10–9 3 1.51±0.04 0.23±0.04 0.09±0.02 0.60±0.19 0.48±0.10
CH3OH 20–10 A+ 3 1.43±0.13 0.40±0.08 0.16±0.04 – 0.86±0.19
C18O 2–1 15 1.41±0.16 0.43±0.10 0.18±0.05 1.15 0.94±0.25
CH3OH 20–10 A+ 15 1.41±0.18 0.39±0.09 0.16±0.04 – 0.85±0.22
CH3OH 20–10 A+ 10 1.38±0.15 0.38±0.11 0.15±0.05 1.09 0.83±0.26
CH3OH 21–11 E 10 1.37±0.15 0.39±0.12 0.16±0.06 – 0.85±0.30
C18O 2–1 5 1.30±0.07 0.46±0.07 0.19±0.03 1.04±0.16 1.00±0.17
H13CO+ 1–0 5 1.33±0.07 0.46±0.10 0.19±0.05 – 0.99±0.25
H13CO+ 1–0 5 1.33±0.07 0.46±0.10 0.19±0.05 1.35±0.36 0.99±0.25
CH3OH 20–10 A+ 5 1.29±0.09 0.36±0.08 0.14±0.04 – 0.76±0.20

Notes.All uncertainties are dispersions around the mean of each distribution apart from the uncertainty of the ratio of the non-thermal velocity dispersions. The latter is the dispersion above or below the mean computed by taking the difference between the largest value within 68% of the population (above or below the mean) and the mean value itself.

(a)

Number of cores with detections in both tracers.

(b)

Average systemic velocities.

(c)

Average FWHM linewidths.

(d)

Average non-thermal velocity dispersion, calculated for T = 10 K.

(e)

Mean ratio of the non-thermal dispersions of each pair of tracers. The transition listed first is denoted with the subscript 1 and the second with the subscript 2.

(f)

Average ratio of the non-thermal to the mean thermal velocity dispersions.

(g)

Composite C18O and C17O sample (see Sect. 3).

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