J19451-5034
EC19413-5041 · Culpan knownhsd
outside the grid χ²/N = 0.96
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
Line-profile fit — uli
Results and provenance
Fit — Bamberg
| Teff [K] | 42466 ± 901 |
| log g | 6.620 ± 0.115 |
| log n(He)/n(H) | -5.623 ± 1.796 upper limit |
| reduced χ² | 0.961 over 573 points |
| radial velocity | -139.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 12 |
| 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 19:10:26 |
Fit — uli
| Teff [K] | 41284 ± 988 |
| log g | 6.499 ± 0.110 |
| log n(He)/n(H) | -3.577 ± 0.225 upper limit |
| reduced χ² | 0.968 over 573 points |
| radial velocity | -139.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 12 |
| grids | h667.grid h909.grid h97.grid h99.grid +1 more |
| settled | outside the grid |
| fitted | 04/09/2026 18:37:07 |
Observation
| source file | spec-025377-60168-27021599438369404.fits |
Gaia astrometry
| Gaia DR3 source | 6646081051517197568 |
| parallax [mas] | 0.8576 ± 0.0810 |
| G | 16.373 |
| Gabs | 6.043 |
| μα [mas/yr] | -1.879 |
| μδ [mas/yr] | -9.476 |
| l, b | 347.821, -28.912 |
Published (Culpan et al. 2022)
| class (Culpan) | He-sdO |
| class (SIMBAD) | sdOHe |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -2.25 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -2.01 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -1.90 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -1.84 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -1.80 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -1.78 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| H\d10 3797.90 ---- | |||||
| H\d11 3770.63 ---- | |||||
| He II 4686 | 4685.70 | -2.17 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | -2.07 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -1.87 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -2.28 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 42466 K · log g 6.620 · E(44−55) 0.026 · χ²r 0.13 over 32 bands
distance 1166 pc · parallax 0.8600 ± 0.0800 mas (9%) · R 0.0613 +0.0065 −0.0053 R☉ · M 0.571 +0.150 −0.112 M☉ · L 11.0 +2.5 −1.9 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.