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Table 4

Spectral line parameters at the centers of the starless cores.

Source Line Δvchann v LSR (a,b) (a,b) ΔvFWHM(a,b) Δvtherm(c) Δvnon−therm I line(d)
[m/s] [km s-1] [K] [K] [km s-1] [km s-1] [km s-1] [K km s-1]
CB 4 12CO(2−1) 0.325 −11.423 ± 0.002 13.3 ± 0.3 0.11 0.510 ± 0.007 0.15 0.49 ± 0.01 7.8 ± 0.6
13CO(2−1) 0.34 −11.35 ± 0.01 7.3 ± 0.6 0.22 0.45 ± 0.02 0.15 0.42 ± 0.03 4.4 ± 0.3
C18O(2−1) 0.053 −11.442 ± 0.004 3.5 ± 0.3 0.15 0.19 ± 0.01 0.15 0.12 ± 0.04 0.73 ± 0.04
N2H+(1−0) 0.063 −11.355 ± 0.005 0.47 ± 0.09 0.09 0.17 ± 0.02 0.15 0.08 ± 0.08 0.38 ± 0.08
CB 17 12CO(2−1) 0.325 −4.74 ± 0.01 9.7 ± 0.5 0.15 0.97 ± 0.03 0.14 0.96 ± 0.03 12.8 ± 0.8
13CO(2−1) 0.34 −4.70 ± 0.01 6.2 ± 0.4 0.19 0.71 ± 0.03 0.14 0.70 ± 0.03 2.5 ± 0.4
C18O(2−1) 0.053 −4.764 ± 0.004 2.4 ± 0.1 0.07 0.45 ± 0.01 0.13 0.43 ± 0.02 1.2
N2H+(1−0) 0.063 −4.630 ± 0.001 1.5 ± 0.2 0.19 0.325 ± 0.002 0.14 0.29 ± 0.01 3.0
CB 26 12CO(2−1) 0.325 +5.590 ± 0.007 3.6 ± 0.1 0.08 1.17 ± 0.02 0.14 1.16 ± 0.02 6.3 ± 0.3
13CO(2−1) 0.34 +5.64 ± 0.01 2.7 ± 0.2 0.14 1.01 ± 0.03 0.14 1.00 ± 0.03 2.3 ± 0.5
C18O(2−1) 0.053 +5.60 ± 0.02 1.1 ± 0.1 0.15   0.70 ± 0.04(e) 0.14 0.69 ± 0.04 0.73 ± 0.09
N2H+(1−0) 0.063 (f) (f) 0.08 (f) (f) (f) 0.4 ± 0.1
CB 27 12CO(2−1) 0.325 +7.127 ± 0.005 4.1 ± 0.1 0.08 0.89 ± 0.01 0.14 0.88 ± 0.01 4.4 ± 0.2
13CO(2−1) 0.34 +7.14 ± 0.02     3.4 ± 0.05 0.10 0.61 ± 0.05 0.14 0.59 ± 0.06 2.2 ± 0.3
C18O(2−1) 0.053 +7.058 ± 0.005 3.0 ± 0.2 0.16 0.24 ± 0.01 0.13 0.20 ± 0.02 0.78 ± 0.06
N2H+(1−0) 0.063 +7.104 ± 0.001  2.1 ± 0.08 0.08   0.187 ± 0.004 0.14 0.12 ± 0.03 2.15 ± 0.07
B 68 12CO(2−1) 0.325 +3.30 ± 0.01 5.9 ± 0.4 0.16 0.63 ± 0.02 0.14 0.61 ± 0.03 4.4 ± 0.3
13CO(2−1) 0.34 +3.35 ± 0.01 3.1 ± 0.5 0.12 0.51 ± 0.05 0.14 0.49 ± 0.06 1.8 ± 0.3
C18O(2−1) 0.030 +3.292 ± 0.001 2.10 ± 0.02 0.02 0.200 ± 0.001 0.14 0.14 ± 0.02 0.45 ± 0.04
N2H+(1−0) 0.063 +3.347 ± 0.001 0.88 ± 0.01 0.01 0.249 ± 0.003 0.14 0.21 ± 0.02    1.5 ± 0.04
CB 130 12CO(2−1) 0.051 (f) 2.3(h) 0.08 4.2(i) 0.14 .. 11.6 ± 0.1
13CO(2−1) 0.053 +7.60 ± 0.01 1.2 ± 0.1 0.07         1.26 ± 0.04(e) 0.14 1.25 ± 0.04   1.8 ± 0.1
C18O(2−1) 0.053 +7.524 ± 0.006 0.96 ± 0.05 0.05 0.48 ± 0.01 0.14 0.46 ± 0.02   0.52 ± 0.03
N2H+(1−0) 0.063 +7.514 ± 0.002 1.34 ± 0.04 0.04 0.397 ± 0.005 0.14 0.37 ± 0.01    3.2 ± 0.05
CB 244 12CO(2−1) 0.325 +3.407 ± 0.008 4.2 ± 0.1 0.05 1.62 ± 0.02 0.13 1.61 ± 0.02 7.5 ± 0.5
13CO(2−1) 0.34 +3.86 ± 0.01 2.5 ± 0.1 0.07 0.98 ± 0.03 0.13 0.97 ± 0.03 2.7 ± 0.2
C18O(2−1) 0.053 +3.805 ± 0.007 3.0 ± 0.2 0.19 0.43 ± 0.02 0.13 0.41 ± 0.03 1.2 ± 0.1
N2H+(1−0) 0.063 +3.875 ± 0.002 1.90 ± 0.08 0.08    0.34 ± 0.005 0.13 0.31 ± 0.01 4.6 ± 0.2

Notes.

(a)

For the CO isotopologues determined from Gaussian fits, for N2H+ determined from fits of the hyperfine structure,

(b)

for N2H+ of the main line at 93 173.777 MHz,

(c)

assuming a constant gas temperature along the LoS that is equal to the dust temperature derived from modified black body fitting. We estimate an uncertainty of 0.02 km s-1.

(d)

Determined by integrating of the spectra (in the case of N2H+ all components).

(e)

This line is double peaked. The linewidth given here is given for a Gaussian fitted to the full spectrum,

(f)

not detected,

(g)

not determinable,

(h)

not fit with a Gaussian. Peak value taken directly from the spectrum.,

(i)

not fit with a Gaussian. Width of spectrum where .

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