Table 4
Diagnostic indicated physical conditions.
| Ion | I.P. | Lines | Ratio | Ne,Te(K)1 | HES | 1995 | 2001 |
|
|
|||||||
| (eV) | Ne(cm-3) | –Te(K)– | (K) | (K) | |||
| [S iii ] | 23.3 | I(9069+9531)/I(6312)* | 71.9 (9.1%) | (10 000) | 9300 ± 340 | 9500 | 9200 |
| [Ar iii ] | 27.6 | I(7751+7136)/I(5192)* | 276 (11%) | (10 000) | 8500 ± 250 | 8900 | 8000 |
| [O iii ] | 35.1 | I(4959+5007)/I(4363) | 237 (11%) | (10 000) | 9500 ± 210 | 9850 | 9500 |
| [Cl iv ] | 39.61 | I(5323)/I(7530+8045)* | 0.0274 (8.1%) | (10 000) | 11 000 ± 900 | 11 000 | – |
|
|
|||||||
| Te(K) | –log Ne(cm-3)– | (cm-3) | (cm-3) | ||||
| [S ii ] a | 10.4 | I(6716+6731) /I(4069+4076)* | 2.86 (9.2%) | 9000 | 3.86 ± 0.04 | – | – |
| [O ii ] a | 13.6 | I(3726+3729)/I(7319+7330)* | 3.64 (8.1%) | 9000 | 4.73 ± 0.42 | 4.04 | 4.78 |
| [Ar iv ] a | 40.7 | I(4711+4740)/I(7171)* | 61.0 (8.7%) | 9500 | 4.86 ± 0.05 | 4.85 | 4.88 |
| [N i ] | -0- | I(5198)/I(5200) | 1.58 (8.9%) | (8500) | 3.06 ± 0.11 | 3.03 | 3.13 |
| [S ii ] | 10.4 | I(6716)/I(6731) | 0.531 (4.8%) | (9000) | 3.93 ± 0.12 | 4.03 | 4.10 |
| [O ii ] | 13.6 | I(3726)/I(3729) | 2.18 (8.1%) | (9000) | 3.45 ± 0.09 | 3.50 | 3.42 |
| [N ii ] | 14.5 | I(5755)/I(6548+6583) | 0.0141 (5.4%) | 9000 | 4.33 ± 0.01 | 4.40 | 4.33 |
| [Cl iii ] | 23.8 | I(5518)/I(5538) | 0.578 (2.6%) | (9500) | 4.13 ± 0.03 | 4.12 | 4.15 |
| [Ar iv ] | 40.7 | I(4711)/I(4740) | 0.658 (8.7%) | (9500) | 4.10 ± 0.08 | 3.95 | 4.16 |
Notes. The 1995 and 2001 diagnostics in Cols. 7 and 8 are for the long exposures, except those for [O iii ] . 1Tes were obtained assuming Ne ~ 10 000 cm-3 while Nes were obtained assuming Te = 8500 K, 9000 K, and 9500 K as in Col. 5. The letter “a” as in [S ii ] a indicates the auroral-to-nebular transition ratio. * highly uncertain since the wavelength difference involving the line ratio is so large.
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