Forbidden atomic carbon, nitrogen, and oxygen emission lines in the water-poor comet C/2016 R2 (Pan-STARRS)

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Table 2

Observed intensity ratios of atomic oxygen, carbon, and nitrogen emissions in C/2016 R2 at different nucleocentric projected distances.

Distance (10³ km)	[OI]	[CI] ^(*)	[NI]
0.3875 ± 0.3875	0.28 ± 0.03	0.12 ± 0.02	1.12 ± 0.22
1.5500 ± 0.7750	0.23 ± 0.02	0.07 ± 0.01	1.31 ± 0.26
3.1000 ± 0.7750	0.19 ± 0.02	0.06 ± 0.01	1.33 ± 0.27
5.4250 ± 1.5500	0.18 ± 0.02	0.06 ± 0.01	1.12 ± 0.22
8.4475 ± 1.4725	0.19 ± 0.02	0.02 ± 0.01	1.34 ± 0.27

Full slit	0.23 ± 0.01	0.08 ± 0.01	1.22 ± 0.09

Notes. ^(*) (9824 + 9850) emission intensity is calculated by multiplying the observed 9850 Å emission intensity with a factor of 1.34. See the main text for more details.

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