Table 1
Fluorescence efficiency (g factor) in photons s−1 ion−1computed for comet C/2016 R2 at the time of observations and for any comet at 1 au and a heliocentric velocity of 0.0 km s−1).
| Band (v',v") | g | g (at 1 au) |
|---|---|---|
| (0, 0) | 6.26 × 10−3 | 4.90 × 10−2 |
| (0,0)[3885.5–3915Å] | 5.41 × 10−3 | |
| (0, 1) | 2.05 × 10−3 | 1.59 × 10−2 |
| (0, 2) | 4.22 × 10−4 | 3.31 × 10−3 |
| (1, 0) | 1.43 × 10−3 | 1.08 × 10−2 |
| (1, 1) | 9.65 × 10−4 | 7.24 × 10−3 |
| (1, 2) | 1.02 × 10−3 | 7.67 × 10−3 |
| (2, 0) | 1.67 × 10−4 | 1.24 × 10−3 |
| (2, 1) | 1.39 × 10−3 | 1.04 × 10−2 |
| (2, 2) | 1.58 × 10−4 | 1.18 × 10−3 |
Notes. For C/2016 R2, the heliocentric distance is 2.76 au and the heliocentric velocity is −5.99 km s−1. The gfactor restricted to the [3885.5–3915 Å] wavelength range is not given for 1 au because it cannot be simply compared to the factor computed for the heliocentric distance of C/2016 R2. The relative intensities between the different lines are different.
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