Fig. 12
Excitation temperature from Fe ii lines in the shell. The (red) stars indicate lines with the highest lower excitation energies (6.2 to 7.3 eV). The lowest-excitation lines (2.6−2.9 eV) are indicated by black squares. The black line indicates a 45° slope. This plot was made with θ = 0.55 or T = 9164 K with an uncertainty of ~±170 K (see text). Colors may be seen online.
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