Table 3
Conversion factors and applicability of the analysis method for different spectral lines and species.
| Species | Peak frequency |
|
Typical values from observations | Analysis method safely | |
| ν0 [MHz] | Line width Δv [km s-1] | Field strength BLOS [μG] | usable up to B [μG] | ||
|
|
|||||
| OH1,3 | 1665.4 | 1 | ~[0.5,15] | ~[10,3100] | <300 |
| OH1,3 | 1667.3 | ~1.7 | ~[0.5,15] | ~[10,3100] | <500 |
| CN2 | 113 144.3 | ~100 | ~[1,4] | ~[10,1100] | <60 000 |
| CN2 | 113 170.9 | ~680 | ~[1,4] | ~[10,1100] | <430 000 |
| CN2 | 113 191.3 | ~340 | ~[1,4] | ~[10,1100] | <220 000 |
| CN2 | 113 488.4 | ~100 | ~[1,4] | ~[10,1100] | <60 000 |
| CN2 | 113 491.2 | ~380 | ~[1,4] | ~[10,1100] | <240 000 |
| CN2 | 113 499.7 | ~340 | ~[1,4] | ~[10,1100] | <220 000 |
| CN2 | 113 509.1 | ~130 | ~[1,4] | ~[10,1100] | <80 000 |
| SO1 | 99 299.9 | ~110 | − | − | − |
| SO1 | 138 178.6 | ~200 | − | − | − |
| SO1 | 158 971.8 | ~180 | − | − | − |
| SO1 | 219 949.9 | ~510 | − | − | − |
| SO1 | 236 452.3 | ~160 | − | − | − |
Notes. The conversion factor 
and maximum magnetic field strength up to which the analysis method can be used are calculated with Eqs. (21), (23), and (24).
Reference. (1) Bel & Leroy (1989); (2) Falgarone et al. (2008); (3) Crutcher (1999).
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