The mean value of Fe ii/Mg ii ratio across redshift bins. The second column shows the mean observed value, and the third column shows the adjusted value by applying equation (12) in Sameshima et al. (2017) with each object’s Eddington ratio. For the low redshift objects in Shin et al. (2021), we also listed the mean Fe ii/Mg ii for four high-Eddington ratio objects (log λ• > 0.5) to make a better comparison for the high redshift objects.
| redshift . | (Fe ii/Mg ii)obs . | (Fe ii/Mg ii)adj . | No. objects . | Reference . |
|---|---|---|---|---|
| zγ < 0.367 | 2.88 (3.80) | 4.17 (3.63) | 13 (4) | Shin et al. (2021) |
| 0.7 < zγ < 2.3 | 3.13 | 3.60 | 69 202 | Shen et al. (2011) |
| 4.5 < zγ < 4.7 | 4.62 | – | 5 | Dietrich et al. (2003) |
| 4.5 < zγ < 5.1 | 2.95 | 2.84 | 10 | De Rosa et al. (2011) |
| 5.7 < zγ < 6.4 | 4.56 | 4.37 | 28 | Wang et al. (2022) |
| 5.8 < zγ < 6.4 | 3.03 | 2.44 | 14 | De Rosa et al. (2011) |
| 5.9 < zγ < 6.9 | 5.47 | 5.11 | 32 | Schindler et al. (2020) |
| redshift . | (Fe ii/Mg ii)obs . | (Fe ii/Mg ii)adj . | No. objects . | Reference . |
|---|---|---|---|---|
| zγ < 0.367 | 2.88 (3.80) | 4.17 (3.63) | 13 (4) | Shin et al. (2021) |
| 0.7 < zγ < 2.3 | 3.13 | 3.60 | 69 202 | Shen et al. (2011) |
| 4.5 < zγ < 4.7 | 4.62 | – | 5 | Dietrich et al. (2003) |
| 4.5 < zγ < 5.1 | 2.95 | 2.84 | 10 | De Rosa et al. (2011) |
| 5.7 < zγ < 6.4 | 4.56 | 4.37 | 28 | Wang et al. (2022) |
| 5.8 < zγ < 6.4 | 3.03 | 2.44 | 14 | De Rosa et al. (2011) |
| 5.9 < zγ < 6.9 | 5.47 | 5.11 | 32 | Schindler et al. (2020) |
The mean value of Fe ii/Mg ii ratio across redshift bins. The second column shows the mean observed value, and the third column shows the adjusted value by applying equation (12) in Sameshima et al. (2017) with each object’s Eddington ratio. For the low redshift objects in Shin et al. (2021), we also listed the mean Fe ii/Mg ii for four high-Eddington ratio objects (log λ• > 0.5) to make a better comparison for the high redshift objects.
| redshift . | (Fe ii/Mg ii)obs . | (Fe ii/Mg ii)adj . | No. objects . | Reference . |
|---|---|---|---|---|
| zγ < 0.367 | 2.88 (3.80) | 4.17 (3.63) | 13 (4) | Shin et al. (2021) |
| 0.7 < zγ < 2.3 | 3.13 | 3.60 | 69 202 | Shen et al. (2011) |
| 4.5 < zγ < 4.7 | 4.62 | – | 5 | Dietrich et al. (2003) |
| 4.5 < zγ < 5.1 | 2.95 | 2.84 | 10 | De Rosa et al. (2011) |
| 5.7 < zγ < 6.4 | 4.56 | 4.37 | 28 | Wang et al. (2022) |
| 5.8 < zγ < 6.4 | 3.03 | 2.44 | 14 | De Rosa et al. (2011) |
| 5.9 < zγ < 6.9 | 5.47 | 5.11 | 32 | Schindler et al. (2020) |
| redshift . | (Fe ii/Mg ii)obs . | (Fe ii/Mg ii)adj . | No. objects . | Reference . |
|---|---|---|---|---|
| zγ < 0.367 | 2.88 (3.80) | 4.17 (3.63) | 13 (4) | Shin et al. (2021) |
| 0.7 < zγ < 2.3 | 3.13 | 3.60 | 69 202 | Shen et al. (2011) |
| 4.5 < zγ < 4.7 | 4.62 | – | 5 | Dietrich et al. (2003) |
| 4.5 < zγ < 5.1 | 2.95 | 2.84 | 10 | De Rosa et al. (2011) |
| 5.7 < zγ < 6.4 | 4.56 | 4.37 | 28 | Wang et al. (2022) |
| 5.8 < zγ < 6.4 | 3.03 | 2.44 | 14 | De Rosa et al. (2011) |
| 5.9 < zγ < 6.9 | 5.47 | 5.11 | 32 | Schindler et al. (2020) |
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