6dFGS gJ182452.5-432858
Observation
| Spectrum ID | 203556779_sp1 |
|---|---|
| Alt name | g1824525-432858 |
| z | 0.0718 |
| RA, Dec | 276.2189, -43.4828 |
| MJD | 59019.57 |
| SNR/Å B/R | 23.3/35.5 |
| Obs Airmass | 1.04 |
| SMSS ID | 203556779 |
| Closest SMSS | 3.99'', 203556778 |
| SMSS Mean r6"ap | 16.2 ± 0.1 |
| 2MASS Kext | 12.6 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.069 |
| Power law αν | -0.23 ± 0.07 |
| log L5100,AGN | 43.89 ± 0.01 |
| log HβBr/[O III] | 0.61 ± 0.02 |
| log ML5100/M☉ | 8.08 ± 0.03 |
| log MHα/M☉ | 7.80 ± 0.03 |
| log MHβ/M☉ | 8.05 ± 0.03 |
| log M[O III]/M☉ | 7.93 ± 0.03 |
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 | 40.41 ± 0.12 | 355 ± 63 | 377 ± 30 | 1.26 ± 0.27 |
| Hγ Broad | 41.49 ± 0.02 | 3711 ± 134 | 1158 ± 40 | 15.09 ± 0.40 |
| [O III] 4364 | 39.67 ± 0.34 | 329 ± 63 | 139 ± 25 | 0.23 ± 0.13 |
| He II Narrow | 39.98 ± 0.18 | 329 ± 63 | 139 ± 25 | 0.53 ± 0.14 |
| He II Broad | 41.57 ± 0.03 | 7943 ± 249 | 3373 ± 105 | 20.68 ± 0.70 |
| Hβ Narrow | 40.74 ± 0.05 | 355 ± 63 | 377 ± 30 | 3.31 ± 0.30 |
| Hβ Broad | 42.00 ± 0.01 | 4093 ± 126 | 1644 ± 40 | 59.53 ± 0.62 |
| [O III] 5007 | 41.39 ± 0.01 | 355 ± 63 | 378 ± 30 | 15.55 ± 0.34 |
| He I Narrow | 39.99 ± 0.11 | 329 ± 63 | 139 ± 25 | 0.82 ± 0.15 |
| He I Broad | 41.37 ± 0.02 | 5529 ± 150 | 2348 ± 63 | 19.74 ± 0.53 |
| [O I] 6300 | 40.24 ± 0.05 | 329 ± 63 | 139 ± 25 | 1.67 ± 0.14 |
| Hα Narrow | 41.14 ± 0.01 | 329 ± 63 | 139 ± 25 | 14.11 ± 0.21 |
| Hα Broad | 42.51 ± 0.01 | 3113 ± 64 | 1436 ± 25 | 328.95 ± 0.86 |
| [N II] 6585 | 40.88 ± 0.02 | 329 ± 63 | 139 ± 25 | 7.71 ± 0.20 |
| [S II] 6718 | 40.67 ± 0.02 | 329 ± 63 | 139 ± 25 | 5.02 ± 0.19 |
| [S II] 6732 | 40.53 ± 0.03 | 329 ± 63 | 139 ± 25 | 3.64 ± 0.18 |
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 | 36.67 |
|---|---|
| Hβ Broad SNR | 12.68 |
| Hγ Broad SNR | 5.47 |
| AGN frac | 0.71 |
| Host frac | 0.29 |
| log L5100,Host | 43.51 |
| Fe II/Hβ | 0.16 |
| Fe II/[O III] | 0.65 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
hb_width | 0 |
balmer_width | 0 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.