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Table 1
Adopted physical conditions, and derived values of the ionization parameter y for eight angular distances from the star HD 200775 in NGC 7023 NW.
| d(″) | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 |
| G0 | 11 004 | 7042 | 4890 | 3593 | 2751 | 2173 | 1760 | 733 |
| T(K) | 750 | 750 | 750 | 750 | 750 | 750 | 350 | 150 |
| nH (104cm−3) | 1.5 | 1.5 | 1.5 | 1.5 | 2 | 2 | 2 | 2 |
| γ(K1/2cm3) | 125 567 | 80 363 | 55 807 | 41 001 | 23 543 | 18 602 | 10 293 | 2807 |
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