J15587+1922sdO
SDSSJ155846.44+192219.1 · 15:58:46.44 19:22:19.16 · Culpan knownhsd
outside the grid χ²/N = 1.01
Spectrum
shaded: the intervals the fit used · │ a cancelled pixeldrag on either panel to zoom · dbl-click or Esc to reset · arrows to pan
The whole reduced spectrum above, the region marked on it below. Shaded bands are the intervals the fit used; a tick under the axis marks a pixel the rejection mask cancelled.
Line-profile fit — Bamberg
Results and provenance
Fit — Bamberg
| Teff [K] | 57596 ± 661 |
| log g | 5.845 ± 0.058 |
| log n(He)/n(H) | -1.097 ± 0.054 |
| reduced χ² | 1.005 over 745 points |
| radial velocity | -54.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 15 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| settled | outside the grid |
| fitted | 04/09/2026 19:09:33 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | boss |
| date | 2010-06-03 |
| exposure | 6306 s in 14 |
| pipeline | v5_13_2 |
| cosmic rays | 6 pixels cancelled |
| S/N (classifier) | 56.3 |
| source file | spec-3931-55350-0986.fits |
Gaia astrometry
| Gaia DR3 source | 1203338412004998016 |
| parallax [mas] | 0.1780 ± 0.0788 |
| G | 16.780 |
| μα [mas/yr] | -3.040 |
| μδ [mas/yr] | -6.211 |
| l, b | 33.009, 46.522 |
Published (Culpan et al. 2022)
| class (Culpan) | sdO |
| class (SIMBAD) | sdO |
| Teff [K] | 63952 ± 726 |
| log g | 5.64 ± 0.04 |
| log y | -1.02 ± 0.03 |
| reference | 2021ApJS..256...28L |
Classifier
AGREES
fitted Teff 63952 logg 5.64 logY -1.02 2021ApJS..256...28L
auto: He II/He I 8.9, EW 1.33, Mg I b suggests a companion but Ca II does not (0.8 sigma)
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -0.88 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -0.78 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.74 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.72 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.70 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.69 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.68 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.68 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -0.84 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -0.97 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -0.82 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -0.76 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -0.81 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.73 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -0.89 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |