J21250-0002sdOB
SDSSJ212504.92-000207.0 · 21:25:04.92 -00:02:07.01 · Culpan knownhsd
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] | 38554 ± 639 |
| log g | 5.890 ± 0.081 |
| log n(He)/n(H) | -1.555 ± 0.082 |
| reduced χ² | 1.008 over 639 points |
| radial velocity | -57.0 km s−1 |
| resolution (FWHM) | 2.50 Å |
| lines fitted | 12 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 18:33:29 |
Fit — Lei (TLUSTY)
| Teff [K] | 36740 ± 580 |
| log g | 5.730 ± 0.080 |
| log n(He)/n(H) | -1.430 ± 0.070 |
| grids | Lei et al. 2019, ApJ 881, 135 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid |
Observation
| S/N (classifier) | 58.3 |
| source file | spec-56948-EG212551N003203M01_sp04-129.fits.gz |
Gaia astrometry
| Gaia DR3 source | 2687886088269786112 |
| parallax [mas] | 0.3755 ± 0.0879 |
| G | 16.987 |
| μα [mas/yr] | -4.853 |
| μδ [mas/yr] | -3.301 |
| l, b | 52.774, -33.589 |
Published (Culpan et al. 2022)
| class (Culpan) | sdOB |
| class (SIMBAD) | sdBHe |
| Teff [K] | 38624 ± 224 |
| log g | 5.80 ± 0.04 |
| log y | -1.39 ± 0.05 |
| reference | 2021ApJS..256...28L |
Classifier
AGREES
fitted Teff 38624 logg 5.8 logY -1.39 2021ApJS..256...28L
auto: He II 0.44 (3.9 sigma), Mg I b suggests a companion but Ca II does not (-0.6 sigma)
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -0.92 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -0.83 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -0.78 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -0.75 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -0.74 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -0.73 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -0.72 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -0.72 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -0.89 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | -0.85 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -0.77 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -0.94 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |