J18103-5449
Culpan hotsd
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] | 31713 ± 1036 |
| log g | 5.956 ± 0.165 |
| log n(He)/n(H) | -2.088 ± 0.204 |
| reduced χ² | 0.958 over 610 points |
| radial velocity | -109.0 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 |
| fitted | 04/09/2026 19:10:12 |
Fit — uli
| Teff [K] | 30971 ± 959 |
| log g | 5.848 ± 0.183 |
| log n(He)/n(H) | -2.043 ± 0.199 |
| reduced χ² | 0.963 over 610 points |
| radial velocity | -109.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 12 |
| grids | h667.grid h909.grid h97.grid h99.grid +1 more |
| fitted | 04/09/2026 18:36:57 |
Observation
| source file | spec-025921-60167-27021599431125746.fits |
Gaia astrometry
| Gaia DR3 source | 6653092839029855616 |
| parallax [mas] | 0.5817 ± 0.0815 |
| G | 16.715 |
| BP − RP | -0.326 |
| Gabs | 5.539 |
| μα [mas/yr] | -0.851 |
| μδ [mas/yr] | -1.038 |
| RUWE | 1.088 |
| l, b | 339.140, -16.330 |
| selection | f_plx |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -1.77 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -1.58 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -1.49 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -1.44 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -1.41 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -1.39 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -1.38 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| H\d11 3770.63 ---- | |||||
| He II 4686 | 4685.70 | -1.70 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | -1.63 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -1.46 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -1.79 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 31713 K · log g 5.956 · E(44−55) 0.102 · χ²r 0.25 over 31 bands
distance 1719 pc · parallax 0.5800 ± 0.0800 mas (14%) · R 0.1072 +0.0176 −0.0132 R☉ · M 0.379 +0.147 −0.096 M☉ · L 10.5 +3.7 −2.5 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.