J19042-5455
Culpan hotsd
χ²/N = 0.95
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] | 31340 ± 711 |
| log g | 5.732 ± 0.103 |
| log n(He)/n(H) | -2.286 ± 0.177 |
| reduced χ² | 0.949 over 626 points |
| radial velocity | -453.0 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 19:10:22 |
Fit — uli
| Teff [K] | 31929 ± 731 |
| log g | 5.625 ± 0.085 |
| log n(He)/n(H) | -2.241 ± 0.186 |
| reduced χ² | 0.953 over 626 points |
| radial velocity | -453.0 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 18:37:05 |
Observation
| source file | spec-025830-60140-27021599434692682.fits |
Gaia astrometry
| Gaia DR3 source | 6644034826019637760 |
| parallax [mas] | 0.9975 ± 0.0401 |
| G | 15.639 |
| BP − RP | -0.310 |
| Gabs | 5.634 |
| μα [mas/yr] | -28.028 |
| μδ [mas/yr] | 0.853 |
| RUWE | 1.010 |
| l, b | 341.725, -23.692 |
| selection | f_plx |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -7.35 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -6.56 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -6.20 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -6.00 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -5.88 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -5.80 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -5.74 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -5.70 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -7.08 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | -6.76 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -6.08 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -7.44 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 31340 K · log g 5.732 · E(44−55) 0.086 · χ²r 0.11 over 35 bands
distance 1003 pc · parallax 1.0000 ± 0.0400 mas (4%) · R 0.1016 +0.0046 −0.0043 R☉ · M 0.203 +0.032 −0.027 M☉ — below the 0.47 canonical mass · L 9.0 +0.9 −0.8 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.