J09121+1613
PG0909+164 · Culpan knownhsd
χ²/N = 0.98
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] | 42635 ± 341 |
| log g | 5.571 ± 0.029 |
| log n(He)/n(H) | -3.227 ± 0.067 |
| reduced χ² | 0.981 over 747 points |
| radial velocity | -134.0 km s−1 |
| resolution (FWHM) | 2.50 Å |
| lines fitted | 15 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 18:29:35 |
Fit — Lei (TLUSTY)
| Teff [K] | 39490 ± 990 |
| log g | 5.370 ± 0.040 |
| log n(He)/n(H) | -3.020 ± 0.220 |
| grids | Lei et al. 2018, ApJ 868, 70 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid |
Observation
| source file | spec-56656-VB137N18V1_sp01-161.fits.gz |
Gaia astrometry
| Gaia DR3 source | 607898538520616704 |
| parallax [mas] | 0.8439 ± 0.0430 |
| G | 13.792 |
| Gabs | 3.487 |
| μα [mas/yr] | -4.594 |
| μδ [mas/yr] | -2.169 |
| l, b | 213.192, 38.289 |
Published (Culpan et al. 2022)
| class (Culpan) | sdB |
| class (SIMBAD) | sdO8VIIHe1 |
| Teff [K] | 35300 ± 500 |
| log g | 5.33 ± 0.05 |
| log y | -2.76 ± 0.10 |
| reference | 2013A&A...557A.122G |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -2.17 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -1.94 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -1.83 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -1.77 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -1.74 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -1.71 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -1.70 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -1.69 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -2.09 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -2.42 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -2.03 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -1.88 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -2.00 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -1.80 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -2.20 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |