J14520+4533sdO
SDSSJ145203.94+453329.6 · 14:52:03.94 45:33:29.59 · Culpan knownhsd
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] | 48451 ± 1114 |
| log g | 5.917 ± 0.083 |
| log n(He)/n(H) | -1.991 ± 0.076 |
| reduced χ² | 0.989 over 750 points |
| radial velocity | 142.0 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 18:31:28 |
Fit — Lei (TLUSTY)
| Teff [K] | 49470 ± 1360 |
| log g | 5.650 ± 0.080 |
| log n(He)/n(H) | -1.980 ± 0.140 |
| grids | Lei et al. 2020, ApJ 889, 117 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid |
Observation
| S/N (classifier) | 46.4 |
| source file | spec-58605-HD145433N463537M02_sp05-036.fits.gz |
Gaia astrometry
| Gaia DR3 source | 1586890398971315200 |
| parallax [mas] | 0.2860 ± 0.0701 |
| G | 17.194 |
| μα [mas/yr] | -5.680 |
| μδ [mas/yr] | -0.821 |
| l, b | 78.545, 59.811 |
Published (Culpan et al. 2022)
| class (Culpan) | sdO |
| class (SIMBAD) | sdO |
| Teff [K] | 49358 ± 5000 |
| log g | 5.56 ± 0.20 |
| log y | -2.01 ± 0.40 |
| reference | 2009PhDT.......273H |
Classifier
AGREES
fitted Teff 49358 logg 5.56 logY -2.01 2009PhDT.......273H
auto: He II/He I 6.8, EW 1.02
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | 2.30 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | 2.06 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | 1.94 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | 1.88 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | 1.84 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | 1.82 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | 1.80 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | 1.79 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | 2.22 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | 2.56 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | 2.15 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | 1.99 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | 2.12 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | 1.91 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | 2.33 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |