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Table 7
Spatially resolved abundances in NGC 6781.
| Positiona | ΔRAb | C+/H+ | N+/H+ | N2+/H+ | O2+/H+ | C/O | N/O | C | N | O |
| (′′) | (×10-4) | (×10-5) | (×10-5) | (×10-4) | ||||||
|
|
||||||||||
| Cen5 | −20 | 4.2 ± 1.1 | 7.6 ± 1.5 | 10.5 ± 1.3 | 5.3 ± 1.1 | 1.1 ± 0.5 | 0.2 ± 0.1 | 9.0 ± 0.2 | 8.3 ± 0.1 | 9.0 ± 0.1 |
| Cen4 | −10 | 2.3 ± 0.5 | 4.8 ± 0.6 | 8.7 ± 0.6 | 4.0 ± 0.5 | 1.1 ± 0.3 | 0.2 ± 0.1 | 8.8 ± 0.1 | 8.1 ± 0.1 | 8.8 ± 0.1 |
| Cen3 | 0 | 0.9 ± 0.1 | 2.8 ± 0.2 | 8.8 ± 0.3 | 3.9 ± 0.3 | 0.7 ± 0.1 | 0.2 ± 0.1 | 8.5 ± 0.1 | 8.1 ± 0.1 | 8.7 ± 0.1 |
| Cen2 | 10 | 1.2 ± 0.2 | 3.2 ± 0.2 | 9.6 ± 0.4 | 4.5 ± 0.4 | 0.8 ± 0.2 | 0.2 ± 0.1 | 8.7 ± 0.1 | 8.1 ± 0.1 | 8.8 ± 0.1 |
| Cen1 | 20 | 2.4 ± 0.5 | 5.0 ± 0.6 | 9.0 ± 0.6 | 4.2 ± 0.5 | 1.0 ± 0.3 | 0.2 ± 0.1 | 8.8 ± 0.1 | 8.2 ± 0.1 | 8.8 ± 0.1 |
| Rim5 | 30 | 11.5 ± 6.2 | 17.8 ± 8.2 | 9.9 ± 1.1 | 4.3 ± 0.8 | 1.5 ± 1.3 | 0.2 ± 0.1 | 9.3 ± 0.3 | 8.4 ± 0.1 | 9.1 ± 0.2 |
| Rim4 | 40 | 4.7 ± 1.2 | 9.7 ± 1.8 | 5.8 ± 0.4 | 2.8 ± 0.3 | 1.0 ± 0.4 | 0.2 ± 0.1 | 8.9 ± 0.2 | 8.2 ± 0.1 | 8.9 ± 0.1 |
| Rim3 | 50 | 9.8 ± 3.4 | 15.9 ± 4.7 | 1.7 ± 0.1 | 0.9 ± 0.1 | 1.2 ± 0.8 | 0.2 ± 0.1 | 9.0 ± 0.2 | 8.3 ± 0.1 | 8.9 ± 0.1 |
| Rim2 | 60 | <46. | <78. | <6.8 | <3.8 | <1.0 | <0.2 | <9.7 | <8.9 | <9.7 |
| Rim1 | 70 | <140. | <240. | <100. | <18. | <2.2 | <0.6 | <10. | <9.5 | <9.8 |
Notes.
(a)
As designated in Fig. 12
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