ESO 451-2
Observation
| Spectrum ID | 119612141_sp1 |
|---|---|
| Alt name | g1558468-320020 |
| z | 0.0258 |
| RA, Dec | 239.6951, -32.0054 |
| MJD | 60529.42 |
| SNR/Å B/R | 14.4/28.6 |
| Obs Airmass | 1.04 |
| SMSS ID | 119612141 |
| Closest SMSS | 12.75'', 119612129 |
| SMSS Mean r6"ap | 16.2 ± 0.1 |
| 2MASS Kext | 11.3 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.184 |
| Power law αν | -0.10 ± 0.26 |
| log L5100,AGN | 42.58 ± 0.04 |
| log HβBr/[O III] | — |
| log ML5100/M☉ | — |
| log MHα/M☉ | — |
| log MHβ/M☉ | — |
| log M[O III]/M☉ | — |
Spatial extraction & sky subtraction region
Spaxel scale: 1 arcsec² — Flux units: erg s⁻¹ cm⁻² Å⁻¹
Apertures: object (solid), background (dashed)
Spectrum decomposition
Emission line measurements
| Line | log L (erg s⁻¹) | FWHM (km s⁻¹) | σ (km s⁻¹) | EW (Å) |
|---|---|---|---|---|
| Hγ Narrow | 39.66 ± 0.09 | 310 ± 63 | 171 ± 28 | 4.47 ± 0.50 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.01 ± 0.29 | 301 ± 62 | 127 ± 25 | 1.01 ± 0.40 |
| He II Narrow | 38.90 ± 0.28 | 301 ± 62 | 127 ± 25 | 0.90 ± 0.37 |
| He II Broad | 39.88 ± 0.17 | 6948 ± 64 | 2951 ± 26 | 8.64 ± 1.79 |
| Hβ Narrow | 40.04 ± 0.04 | 310 ± 63 | 171 ± 28 | 13.54 ± 0.46 |
| Hβ Broad | — | — | — | — |
| [O III] 5007 | 40.03 ± 0.03 | 310 ± 63 | 171 ± 28 | 13.79 ± 0.46 |
| He I Narrow | 39.08 ± 0.16 | 301 ± 62 | 127 ± 25 | 2.09 ± 0.35 |
| He I Broad | 39.30 ± 0.21 | 1276 ± 64 | 542 ± 26 | 3.49 ± 0.71 |
| [O I] 6300 | 39.01 ± 0.15 | 301 ± 62 | 127 ± 25 | 2.05 ± 0.41 |
| Hα Narrow | 40.90 ± 0.01 | 301 ± 62 | 127 ± 25 | 116.79 ± 0.54 |
| Hα Broad | — | — | — | — |
| [N II] 6585 | 40.60 ± 0.01 | 301 ± 62 | 127 ± 25 | 60.23 ± 0.49 |
| [S II] 6718 | 40.02 ± 0.02 | 301 ± 62 | 127 ± 25 | 23.56 ± 0.56 |
| [S II] 6732 | 39.94 ± 0.02 | 301 ± 62 | 127 ± 25 | 19.92 ± 0.54 |
All narrow line widths are tied to narrow [O III] 5007Å. [O III] 5007Å and narrow Hβ include a second narrow component not tied to other narrow lines.
Emission summary
| Hα Broad SNR | 0.00 |
|---|---|
| Hβ Broad SNR | 0.00 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.36 |
| Host frac | 0.64 |
| log L5100,Host | 42.82 |
| Fe II/Hβ | — |
| Fe II/[O III] | 1.95 |
Quality flags
spurious_hab/hbb | 1.0/0 |
|---|---|
l5100 | 1 |
balmer | 2 |
balmer_snr | 2 |
hb_width | 2 |
balmer_width | 2 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.