Table 8: Velocities of C18O and HCO+ lines and asymmetry parameters.

Source		 v [km s-1] v [km s-1] $\delta v$ R/B
  N2H+ HCO+    
L 1448 IRS 2 4.12 4.53 0.82* 1.28
L 1448 IRS 3 4.62 5.40 0.84 -
L 1448 C 4.95 5.45 0.66 2.21
L 1455 A1 5.10 5.12 0.03 -
L 1455 A2 4.88 4.94 0.17 -
Per 4 S 7.52 7.25 -0.92 -
Per 4 N 7.57 7.44 -0.40 -
Per 5 8.15 7.65 -1.31 -
Per 6 5.94 6.02 0.05 1.82
IRAS 03282 6.06 6.62 -0.91 0.57
Barnard 1-B 6.62 6.01 -0.74 0.45
HH 211 9.12 9.27 0.37* 1.47
Barnard 5 IRS 1 10.27 10.29 0.05 3.88
L 1527 5.90 5.38 -1.60 -
L 483 5.40 5.87 1.06 3.18
SMM 5 8.12 8.18 -0.33 -
L 723 11.11 11.43 0.46 1.61
L 673 A 6.87 6.97 0.19 -
B 335 8.34 7.90 -1.10* 0.833
L 1157 2.67 3.16 0.75 1.54
Values for $\delta v$ marked with * are ambiguous due to nearly equal peak intensities
of the double-peaked HCO+ line, i.e. the R/B ratio is close to one.

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