Selection of highly-accreting quasars - Spectral properties of Fe IIopt emitters not belonging to extreme Population A

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Table B.2.

Coefficients and limiting line ratios for [O II] in Eq. (B.2)

ℛ	a	b	c	ℛ_min^(a)	ℛ_max^(b)
[O II]λ3729/λ3726	0.3771	2468	638.4	0.3839	1.4558

Notes.

^(a)

Theoretical minimum line ratio calculated in the high-density limit of 100 000 cm⁻³.

^(b)

Theoretical maximum line ratio calculated in the low-density limit of 1 cm⁻³.

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