J21278+0029sdO
SDSSJ212749.34+002924.1 · 21:27:49.34 00:29:24.22 · Culpan knownhsd
outside the grid χ²/N = 0.99
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] | 58834 ± 556 |
| log g | 6.559 ± 0.106 |
| log n(He)/n(H) | -1.078 ± 0.126 |
| reduced χ² | 0.987 over 742 points |
| radial velocity | -14.0 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 19:10:42 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | boss |
| date | 2010-09-11 |
| exposure | 6306 s in 14 |
| pipeline | v5_13_2 |
| cosmic rays | 3 pixels cancelled |
| S/N (classifier) | 38.3 |
| source file | spec-4194-55450-0552.fits |
Gaia astrometry
| Gaia DR3 source | 2687977931850851584 |
| parallax [mas] | 0.3623 ± 0.1298 |
| G | 17.937 |
| μα [mas/yr] | 1.810 |
| μδ [mas/yr] | -9.450 |
| l, b | 53.755, -33.871 |
Published (Culpan et al. 2022)
| class (Culpan) | sdO |
| class (SIMBAD) | DAO/sdO |
| Teff [K] | 73371 ± 3025 |
| log g | 5.96 ± 0.08 |
| log y | -0.60 ± 0.07 |
| reference | 2021ApJS..256...28L |
Classifier
AGREES
fitted Teff 73371 logg 5.96 logY -0.6 2021ApJS..256...28L
auto: He II/He I 13.0, EW 1.95, red end too noisy for Ca II (S/N 14) -- a companion is neither seen nor excluded
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -0.23 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -0.20 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.19 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.19 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.18 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.18 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.18 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.18 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -0.22 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -0.25 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -0.21 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -0.20 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -0.21 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.19 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -0.23 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |