Table 1
Scale lengths and fluorescence efficiency of different molecules at 1 au scaled by 
.
| Molecules | Parent | Daughter | g-factors |
|---|---|---|---|
| (km) | (km) | (erg s−1 mol−1) | |
| OH(0,0) | 2.4 × 104 | 1.6 × 105 | 1.49 × 10−15 |
| NH(0,0) | 5.0 × 104 | 1.5 × 105 | 6.27 × 10−14 |
| CN(Δυ = 0) | 1.3 × 104 | 2.1 × 105 | 2.62 × 10−13 |
| C3(λ = 4050 Å) | 2.8 × 103 | 2.7 × 105 | 1.00 × 10−12 |
| C2(Δυ = 0) | 2.2 × 104 | 6.6 × 104 | 4.50 × 10−13 |
Notes. The scale lengths are equivalent to the lifetimes of molecules as we used a constant radial velocity of 1 km s−1 (A’Hearn et al. 1995). The fluorescence efficiency is taken from Schleicher’s website (https://asteroid.lowell.edu/comet/gfactor.html).
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