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Table 2

Derived CCS(21–10) line parameters and column densities for CCS and ammonia, and the corresponding abundance ratio NNH3/NCCS.

Source Group υLSR Tmb Δυobs Δυnth NCCS NNH3 (Ref.) NNH3/NCCS
[km s-1] [mK] [km s-1] [mK km s-1] [km s-1] [1012 cm-2] [1014 cm-2]
CB 3 0 ...  < 96 ... ... ...  < 1.42 1.54  ±  0.26* (1)  > 104
CB 6 I ...  < 90 ... ... ...  < 1.32 0.29  ±  0.07*  > 22
CB 12  −I    ...  < 117 ... ... ...  < 1.70 1.45  ±  0.24* (1)  > 86
CB 17   − I a  −4.65  ±  0.02 233  ±  37 0.45  ±  0.06 112  ±  12 0.44  ±  0.06 4.89  ±  0.53 13.84  ±  3.74 201  ±  47  
CB 22  −I     −1.03  ±  0.01 233  ±  37 0.15  ±  0.05   36  ±  7 0.08  ±  0.08 1.42  ±  0.29 3.64  ±  0.87 (1) 257  ±  80
CB 23  −I    4.86  ±  0.01 375  ±  39 0.17  ±  0.02   66  ±  8 0.11  ±  0.03 2.39  ±  0.28 10.1  ±  1.1 (1) 422  ±  67
CB 26 I ...  < 114 ... ... ...  < 1.67 0.48  ±  0.18* (1)  > 28
CB 28  −I    9.01  ±  0.02 223  ±  40 0.29  ±  0.04   69  ±  9 0.26  ±  0.05 3.48  ±  0.45 1.95  ±  1.18 (1) 56  ±  34
CB 34 0 0.17  ±  0.05 119  ±  37 0.60  ±  0.14   57  ±  10 0.59  ±  0.15 2.64  ±  0.53 0.92  ±  0.44* (1) 34  ±  17
CB 44 (−I)    ...  < 132 ... ... ...  < 1.95 0.65  ±  0.15* (1)  > 34
CB 68 0 ...  < 120 ... ... ...  < 1.48 12.7  ±  0.9 (1)  > 860
CB 125 (I) ...  < 132 ... ... ...  < 1.88 6.01  ±  1.63 (1)  > 320
CB 179  −I    ...  < 102 ... ... ...  < 1.49 0.59  ±  0.15* (1)  > 40
CB 188 I 6.14  ±  0.04 111  ±  35 0.44  ±  0.08   52  ±  10 0.42  ±  0.09 2.21  ±  0.41 1.10  ±  0.33* (1) 50  ±  17
CB 222  −I     −2.70  ±  0.05 102  ±  25 0.34  ±  0.12   36  ±  12 0.31  ±  0.14 1.54  ±  0.53 0.65  ±  0.08* 42  ±  15
CB 224    0 b ...  <144 ... ... ...  <2.61 6.23  ±  1.17 (1)  >239
CB 230    I c 2.41  ±  0.03 190  ±  49 0.33  ±  0.12   66  ±  16 0.30  ±  0.13 2.79  ±  0.66 0.71  ±  0.24* (1) 26  ±  9
CB 232   − I d 12.50  ±  0.03 138  ±  41 0.23  ±  0.07   34  ±  9 0.19  ±  0.09 1.42  ±  0.38 0.54  ±  0.21* (1) 38  ±  15
CB 243   − I e ...  <114 ... ... ...  <1.67 2.77  ±  1.04 (1)  >166
CB 244 0 4.18  ±  0.03 162  ±  41 0.31  ±  0.07   54  ±  10 0.29  ±  0.07 1.96  ±  0.37 8.08  ±  2.37** (1) 412  ±  143
CB 246  −I     −0.65  ±  0.01 462  ±  39 0.24  ±  0.03 120  ±  11 0.21  ±  0.03 5.67  ±  0.49 7.70  ±  1.01 (1) 136  ±  18 
BHR 12 I+0 f  6.36  ±  0.07 190  ±  68 0.35  ±  0.15   71  ±  23 0.33  ±  0.16 2.75  ±  0.88 5.4 (2) 196  ±  62
BHR 13 (I) ...  <294 ... ... ...  <7.14 0.68  ±  0.22*  >10
BHR 15 (−I)    ...  <221 ... ... ...  <5.40 0.7 (2)  >13
BHR 23 (I) ...  <206 ... ... ...  <5.01 4.07  ±  0.67* (2)  >81
BHR 28 (−I)    ...  <209 ... ... ...  <5.08 3.2 (2)  >63
BHR 34 0 ...  <244 ... ... ...  <5.95 0.91  ±  0.50*  >15
BHR 36 I 5.23  ±  0.11 125  ±  61 0.94  ±  0.17 124  ±  26 0.93  ±  0.17 4.13  ±  0.86 7.22  ±  2.01 175  ±  60
BHR 41    I g ...  <198 ... ... ...  <5.07 1.02  ±  0.54*  >20
BHR 55    0 h  −5.36  ±  0.05 173  ±  93 0.27  ±  0.10 100  ±  62 0.25  ±  0.11 3.38  ±  2.11 5.30  ±  1.45 157  ±  107
BHR 59 (0) ...  <221 ... ... ...  <5.37 2.19  ±  0.32* (2)  >41
BHR 71    0 i  −4.52  ±  0.08 209  ±  78 0.87  ±  0.14 193  ±  33 0.86  ±  0.14 6.63  ±  1.15 12.25  ±  2.75 185  ±  51
BHR 74 (−I)     −5.89  ±  0.09 111  ±  45 0.52  ±  0.22   61  ±  18 0.50  ±  0.22 2.19  ±  0.66 1.3 (2) 59  ±  18
BHR 86 0 ...  <264 ... ... ...  <7.23 5.0 (2)  >69
BHR 111 (0)  −0.07  ±  0.03 186  ±  44 0.30  ±  0.06   59  ±  12 0.28  ±  0.07 2.42  ±  0.48 3.6 (2) 149  ±  29
BHR 121-1 I ...  <212 ... ... ...  <5.14 0.42  ±  0.23*  >8
BHR 121-2 I ...  < 201 ... ... ...  <4.90 0.48  ±  0.35*  >10
BHR 137 (0) ...  <245 ... ... ...  <5.95 4.3 (2)  >72
BHR 138 0 ...  <223 ... ... ...  <5.41  <0.46* ...
BHR 139-1 I ...  <211 ... ... ...  <5.12  <0.45* ...
BHR 140-1 0  −0.63  ±  0.07 221  ±  55 1.21  ±  0.16 285  ±  31 1.21  ±  0.16 11.1  ±  1.20 20.4 (2) 184  ±  20
BHR 148 0 ...  <282 ... ... ...  <3.52  <0.80* ...

Notes. (*) Optical thin approximation was used to derive NNH3, (**) NNH3 derived from available map and map-averaged Trot and Tex, since NH3 peak lies outside the CCS beam.

(a)

Main core is prestellar (SMM1+2), but there is a low-luminosity Class I source 20′′  away, slightly outside the beam.

(b)

Main core is Class 0 (SMM1), but there is a Class I source 30′′  away (not inside the telescope beam).

(c)

Contains two Class I IR sources 10′′  apart.

(d)

Main core is most likely prestellar (SMM), but there is a Class I source 12′′  away.

(e)

Main core is most likely prestellar (SMM1), but there is a Class I source 10′′  away.

(f)

A Class 0 and Class I YSO with cores of similar mass separated by 20′′  inside the beam.

(g)

Two close (4′′  separation) infrared sources of Class I (Santos et al. 1998).

(h)

Two close lines with comparable width  ≈ 0.27 km s-1 in CCS.

(i)

Double protostellar core with two IR sources 17′′  apart.

References. (1) Lemme et al. (1996); (2) Bourke et al. (1995b).

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