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Table 2:

Transitional line ratios for high-density tracer molecules.

Source 		Name $\frac{{\rm HCN~(1-0)}}{{\rm CO~(1-0)}}$ $\frac{{\rm HNC~(1-0)}}{{\rm HCN~(1-0)}}$ $\frac{{\rm HCO^+~(1-0)}}{{\rm HCN~(1-0)}}$ $\frac{{\rm CN~(1-0)}}{{\rm HCN~(1-0)}}$ $\frac{{\rm CN~(2-1)}}{{\rm HCN~(1-0)}}$ $\frac{{\rm CN~(2-1)}}{{\rm CN~(1-0)}}$ $\frac{{\rm CS~(3-2)}}{{\rm HCN~(1-0)}}$
IRAS                
00450-2533 NGC 253 -1.41 (-2.768) -0.13 (-1.406) -0.06 (-1.234) 0.24 (-0.805) 0.11 (-1.129) -0.13 (-1.190) -0.39 (-1.366)
01053-1746 IC 1623 -1.44 (-2.249) ... 0.06 (-0.731) ... ... ... ...
01403+1323 NGC 660 -1.34 (-1.778) -0.24 (-0.649) -0.00 (-0.502) <-0.58 ... ... <0.42
01484+2220 NGC 695 -1.84 ... 0.20 ... ... ... ...
02193+4207 NGC 891 -1.77 (-2.325) -0.30 (-0.749) 0.05 (-0.267) ... ... ... ...
02401-0013 NGC 1068 -1.08 (-2.196) -0.41 (-1.197) -0.04 (-1.038) 0.26 (-0.683) ... ... -0.49 (-1.297)
03317-3618 NGC 1365 -1.21 (-1.521) -0.43 (-0.709) -0.18 (-0.422) ... ... ... -0.45 (-0.727)
03419+6756 IC 342 -1.56 (-2.800) -0.47 (-1.658) -0.29 (-1.221) -0.10 (-1.154) -0.59 (-1.747) -0.49 (-1.606) -0.61 (-1.409)
04315-0840 NGC 1614 -1.53 (-2.784) ... ... 0.35 (0.051) 0.45 (-0.245) 0.10 (-0.167) ...
05059-3734 NGC 1808 -1.25 (-2.315) -0.37 (-1.000) -0.26 (-1.376) -0.02 (-1.292) -0.12 (-1.282) -0.10 (-1.345) -1.03 (-1.474)
05083+7936 VII Zw 31 -1.31 ... -0.15 ... ... ... ...
05414+5840 ... -1.44 (-2.211) <-0.59 -0.21 (-0.690) -0.11 (-0.878) <-0.16 <-0.05 <0.20
06106+7822 NGC 2146 -1.87 (-3.381) -0.32 (-1.045) 0.10 (-0.674) 0.31 (-0.289) ... ... <-0.23
07160-6215 NGC 2369 -1.37 (-1.841) <-0.24 ... ... ... ... <-0.06
09293+2143 NGC 2903 -1.62 (-2.316) -0.63 (-1.166) -0.44 (-0.906) ... ... ... ...
09517+6954 M 82 -1.59 (-2.690) -0.28 (-1.321) 0.20 (-0.860) 0.14 (-0.736) -0.13 (-1.144) -0.27 (-1.196) -0.20 (-0.961)
09585+5555 NGC 3079 -1.61 (-2.299) -0.13 (-0.723) <-0.66 ... ... ... -0.45 (-0.979)
10257-4338 NGC 3256 -1.42 (-2.142) <-0.04 0.11 (-0.549) -0.16 (-0.869) -0.31 (-0.992) -0.16 (-1.157) <-0.15
11143-7556 NGC 3620 -1.12 (-1.490) <-0.45 <-0.28 ... ... ... -0.05 (-0.387)
11176+1351 NGC 3628 -1.68 (-2.301) -0.23 (-0.803) -0.21 (-0.740) ... ... ... ...
11257+5850a Arp 299a -1.38 (-2.190) -0.38 (-0.925) 0.21 (-0.523) -0.14 (-0.670) ... ... <-0.05
11257+5850bc Arp 299bc -1.32 (-2.361) ... -0.10 0.45 (-0.244) ... ... ...
11506-3851 ... -0.74 (-1.333) <-0.25 <-0.49 ... ... ... -0.37 (-0.833)
12112+0305 ... -1.13 ... -0.22 ... ... ... ...
12243-0036 ... -1.10 (-2.017) 0.01 (-0.756) -0.13 (-0.816) -0.14 (-0.794) <0.09 <0.24 0.09 (-0.620)
12540+5708 Mrk 231 -0.77 -0.16 (-0.860) -0.41 -0.12 (-0.518) -0.64 (-1.199) -0.52 (-0.833) ...
12542+2157 NGC 4826 -1.89 (-3.065) ... -0.23 (-1.374) ... ... ... ...
13025-4911 NGC 4945 -1.37 (-3.114) -0.27 (-1.863) 0.03 (-1.675) 0.26 (-1.257) 0.16 (-1.496) -0.10 (-1.647) -0.18 (-1.823)
13126+2452 ... <-1.92 ... >0.23 ... >0.04 ... ...
13183+3423 Arp 193 -1.54 ... 0.28 ... ... ... ...
13341-2936 M 83 -0.98 (-1.483) -0.53 (-1.030) -0.35 (-0.640) ... ... ... -1.09 (-1.491)
13428+5608 Mrk 273 -0.79 <-0.41 -0.42 <-0.37 ... ... ...
15065-1107 ... -1.77 (-2.269) ... ... ... ... ... <-0.02
15107+0724 ... -0.96 (-1.510) -0.27 (-0.440) -0.30 (-0.651) -0.24 (-0.114) <0.32 <0.56 -0.04 (-0.441)
15327+2340 Arp 220 -1.05 (-2.440) -0.12 (-0.786) -0.32 (-1.259) 0.18 (-0.628) -0.06 (-0.574) -0.24 (-0.711) 0.10 (-0.538)
16504+0228 NGC 6240 -1.03 -0.59 (-0.894) -0.13 -0.32 (-1.161) 0.13 (-0.981) 0.45 (-0.340) <-0.07
17208-0014 ... -1.14 ... -0.17 <0.09 <-0.28 ... ...
20338+5958 NGC 6946 -1.49 (-3.484) -0.39 (-1.516) -0.07 (-1.874) ... ... ... -0.72 (-1.098)
21453-3511 NGC 7130 -1.19 (-2.470) -0.22 (-1.121) ... -0.09 (-0.786) 0.05 (-0.906) 0.14 (-0.505) ...
22025+4205 ... -0.82 (-1.611) <-0.29 -0.38 (-0.821) <-0.42 <-0.22 ... ...
22347+3409 NGC 7331 >-1.61 ... <-0.22 ... ... ... ...
23007+0836 NGC 7469 -1.41 0.20 (-0.650) 0.17 0.30 (-0.607) ... ... ...
23134-4251 NGC 7552 -1.28 (-1.917) -0.33 (-0.754) -0.05 (-0.597) ... ... ... -0.19 (-0.747)
23156-4238 NGC 7582 -1.52 (-2.051) <0.09 0.13 (-0.216) ... ... ... <0.04
23365+3604 ... -1.26 ... -0.21 ... ... ... ...
23488+1949 NGC 7771 -1.34 ... -0.02 ... ... ... ...
23488+2018 Mrk 331 -1.54 ... 0.10 ... ... ... ...

Notes. The ratios are given in logarithmic form.


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