Table 1.
Best-fit values of the most prominent emission line components in the SDSS-DR15 spectrum of SDSS J1431+4358 (see Fig. 1).
| Spectral line | λpeak | Δλpeak | Δvpeak | vred − vblue | Flux | Luminosity |
|---|---|---|---|---|---|---|
| [Å] | [Å] | [km s−1] | [km s−1] | [10−17 erg cm−2 s ] | [1040 erg s−1] | |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) |
| Hβλ4862.7 Å | 4860.3 ± 2.0 | ∼−2.4 | ∼−148 | ∼250 | ∼12 | ∼0.3 |
| 4864.3 ± 2.0 | ∼1.6 | ∼100 | ∼9 | ∼0.2 | ||
| [OIII]λ4960.3 Å | 4957.1 ± 1.5 | −3.2 ± 2.1 | −194 ± 128 | 436 ± 100 | 13 ± 10 | 0.3 ± 0.6 |
| 4964.3 ± 0.7 | 4.0 ± 1.0 | 242 ± 60 | 31 ± 20 | 0.7 ± 0.2 | ||
| [OIII]λ5008.2 Å | 5005.6 ± 0.5 | −2.6 ± 0.7 | −156 ± 42 | 366 ± 42 | 77 ± 15 | 1.8 ± 0.4 |
| 5011.7 ± 0.5 | 3.5 ± 0.7 | 210 ± 42 | 89 ± 28 | 2.1 ± 0.4 | ||
| [NII]λ6549.9 Å | 6545.0 ± 2.0 | −4.9 ± 2.8 | −223 ± 130 | 310 ± 110 | 22 ± 14 | 0.5 ± 0.3 |
| 6551.8 ± 1.3 | 1.9 ± 1.8 | 87 ± 84 | 37 ± 24 | 0.9 ± 0.4 | ||
| Hαλ6564.6 Å | 6561.5 ± 0.5 | −3.1 ± 0.7 | −142 ± 32 | 348 ± 30 | 87 ± 22 | 2.1 ± 0.4 |
| 6569.1 ± 0.4 | 4.5 ± 0.6 | 206 ± 26 | 94 ± 24 | 2.2 ± 0.4 | ||
| [NII]λ6585.3 Å | 6581.5 ± 1.3 | −3.8 ± 1.8 | −173 ± 85 | 296 ± 87 | 96 ± 25 | 2.2 ± 0.5 |
| 6588.0 ± 1.4 | 2.7 ± 1.9 | 123 ± 90 | 110 ± 30 | 2.6 ± 0.5 | ||
| [SII]λ6718.3 Å | 6714.3 ± 1.2 | −4.0 ± 1.7 | −179 ± 76 | 335 ± 120 | 36 ± 10 | 0.8 ± 0.2 |
| 6721.8 ± 2.4 | ∼3.5 | ∼156 | 32 ± 16 | 0.7 ± 0.3 | ||
| [SII]λ6732.7 Å | 6728.8 ± 3.4 | ∼−3.9 | ∼−174 | ∼263 | ∼24 | ∼0.6 |
| 6734.7 ± 3.4 | ∼2.0 | ∼89 | ∼40 | ∼0.9 |
Notes. The best-fit parameters were obtained by imposing the widths of all the blue (red) Gaussian components to be on the same order, in units of km s−1, of the width estimated for the blue (red) [OIII]λ5008.2 Å component, where FWHM([OIII]blue) = 288 ± 42 km s−1 and FWHM([OIII]red) = 329 ± 72 km s−1. Column (1): Spectral lines (rest-frame vacuum wavelengths). Column (2): Rest-frame wavelengths of the peaks of the blue- and redshifted emission line components. Column (3): Doppler shifts of the blue and red emission line components. Column (4): Line-of-sight velocity offsets of the blue- and redshifted components. Column (5): Line-of-sight velocity offset between red and blue peaks. Columns (6) and (7): Fluxes and luminosities, corrected for Galactic extinction, of the blue- and redshifted components.
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