J15410+3638
SDSSJ154100.52+363840.9 · 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] | 40994 ± 670 |
| log g | 5.395 ± 0.068 |
| log n(He)/n(H) | -2.405 ± 0.138 |
| reduced χ² | 0.991 over 744 points |
| radial velocity | 165.0 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 |
| fitted | 04/09/2026 19:09:29 |
Observation
| source file | spec-4974-56038-0870.fits |
Gaia astrometry
| Gaia DR3 source | 1374648744586858624 |
| parallax [mas] | 0.0736 ± 0.0808 |
| G | 17.700 |
| μα [mas/yr] | 1.765 |
| μδ [mas/yr] | -0.919 |
| l, b | 58.687, 53.086 |
Published (Culpan et al. 2022)
| class (Culpan) | sdOB |
| class (SIMBAD) | sdO |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | 2.68 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | 2.39 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | 2.26 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | 2.19 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | 2.14 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | 2.11 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | 2.09 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | 2.08 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | 2.58 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | 2.98 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | 2.50 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | 2.31 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | 2.46 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | 2.22 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | 2.71 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 40994 K · log g 5.395 · E(44−55) 0.042 · χ²r 0.17 over 9 bands
distance 13587 pc · parallax 0.0700 ± 0.0800 mas (114%) · R 0.3171 +0.5420 −0.1397 R☉ · M 0.913 +5.781 −0.629 M☉ · L 256.2 +1623.7 −175.9 L☉
Photometry against the model, with the residual beneath it in units of the error. The horizontal bar on each point is the passband, not an error; a hollow point was not fitted and the tooltip says why. Drag a box to zoom, double-click or Esc to come back out.