Table 1.
Atomic parameters of the five infrared Fe I absorption lines in the observed spectral window.
| Ion | λ0 [Å] | geff | χl [eV] | log(gf) | σb (a0) | αb | Electronic configuration |
|---|---|---|---|---|---|---|---|
| Fe I | 15645.02 (a) | 2.1 (d) | 6.31 (a) | −0.65 (d) | 1035 (d) | 0.291 (d) | 7P2−7P2(a) |
| Fe I | 15648.52 (a) | 3.0 (b) | 5.43 (a) | −0.675 (b) | 977 (b) | 0.229 (b) | 7D1−7D1(a) |
| Fe I | 15652.87 (a) | 1.5 (b) | 6.25 (a) | −0.043 (b) | 1445 (b) | 0.33 (b) | 7D5−6D4.5 4f[3.5]0(a) |
| Fe I | 15662.02 (a) | 1.5 (c) | 5.83 (a) | 0.19 (c) | 1200 (c) | 0.239 (c) | 5F5−5F4(a) |
| Fe I | 15665.25 (a) | 0.8 (c) | 5.98 (a) | −0.42 (c) | 1283 (c) | 0.234 (c) | 5F1−5D1(a) |
Notes. The laboratory rest wavelength is denoted by λ0, while χl and log(gf) denote the excitation potential of the lower level and the logarithm of the multiplicity of the level upon the oscillator strength, respectively. The σb and αb are collisional broadening parameters from the quantum mechanical theory of Anstee, Barklem, and O’Mara, with σb given in units of the Bohr radius, a0.
Values taken from Nave et al. (1994).
Values taken from Borrero et al. (2003).
Values taken from Bloomfield et al. (2007).
Values taken from Milić et al. (2019).
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