Table 6
Samples used for comparison of N2H+ deuteration in the G202 region.
| Sample | Size | N2D+ (%) | [N2D+]/[N2H+] | R[N2D+] (pc) | R[N2H+] (pc) | Reference |
|---|---|---|---|---|---|---|
| Low-mass starless cores from various regions | 31 | 94 | 0.02–0.44 | 0.2/0.01 | 0.2 | Crapsi et al. (2005) |
| Class 0 and Class 0/I objects from various regions | 20 | 100 | <0.029–0.271 | 0.04 | 0.03 | Emprechtinger et al. (2009) |
| High-mass cores from various regions | 27 | 100 | 0.012–0.43 | 0.1–0.4 | 0.16–0.6 | Fontani et al. (2011) |
| G202 | 5 | 100 | 0.07–0.32 | 0.11 | ~0.08 | This article |
Notes. The columns are: (1) type of sample, (2) the full size of the sample, (3) detection rate of N2D+ in %, (4) deuterium fractionation, (5) effective spatial resolution of the N2D+ observations, (5) effective spatial resolution of the N2H+ observations, (7) article reference. The distances used to calculate the spatial resolutions: a median distance of 157 pc for Crapsi et al. (2005), an average distance of 240 pc for Emprechtinger et al. (2009), and 1.28 kpc and 5 kpc for Fontani et al. (2011).
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