Table 3
Electron number density and temperature for different features in the AR 12356.
| AR Locations | LogNe from ratios | LogNe from ER | LogT from ER | ||||
| R1 | R3 | R4 | (A) | (B) | (A) | (B) | |
| (cm-3) | (cm-3) | (K) | |||||
|
|
|||||||
| Plage | 11.02 | 11.32 | 12.68 | 10.95 | 10.95 | 5.02 | 4.93 |
| Loop | 10.70 | 11.34 | 12.17 | 10.60 | 10.60 | 5.01 | 4.92 |
| BP | 11.06 | 11.08 | 12.49 | 11.00 | 10.95 | 5.00 | 4.90 |
Notes. Columns 2–4: electron number density for the three AR features obtained from the O iv(R1), S iv(R3) and Si iv/O iv(R4) line intensity ratios. R1, R3 and R4 are calculated at the peak temperature of formation for each ion. Columns 5–8: density and temperature diagnostics from the ER methods A and B respectively. The ER method “A” uses ionization balances at low densities (Ne ≈ 108 cm-3). The ER method “B” takes into account the Ne dependence of the ionization balance, see Sect. 5.1 for more detail.
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